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Hot!3090 (Kingpin & others!) - Get that backside VRAM cool!

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Dabadger84
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2021/02/10 18:41:43 (permalink)
Aight, I've been scowering a bit, but I want to get some definitive answers, hoping someone that's gutted their card already for LN2 or whatever can answer:
 
I'm specifically wanting to know the BACKSIDE/Backplate-side Thermal Pad sizes.  I know there are supposedly only pads on the VRAM on that side, I'm looking to get pads for the other areas - My guess is the vRAM is 1.5mm, which means I should get 2mm for the other areas, or is it 1mm on the chips & 1.5mm elsewhere?
 
Looking to further improve my heat dissipation following this crazyiness that the rest of the post will be.
 
Basic premise here is we tryin' to get them backplate/backside vRAM chips nice & cool, and reduce the other temps as a result - I think one of the primary reasons the 3090 FTW3 & other SKUs run as warm as they do is because of PCB heatsoak, which is even higher on the Kingpin because of it's thicker, gold-laced PCB, which is magnified by the vRAM chiplets being stacked on top of each other - adding heatsinks to those areas (since on most of the 3090 SKUs from eVGA I believe have thermal pads already present, maybe not the XC3s) can help.  Here is what I went through so far:
 
 
Inspecting nekkid PCB pics of the Kingpin to figure out WHERE to put stuff, without removing the backplate:
 

Sorry for the blurryness of these ones, they're not mine:


 
So the target areas of the backside, are basically these, you need to cover these areas, but on the backside:
 
\
Which translates to, roughly: 

 
Now my first attempt was a cheap $11 set of Raspberry Pi-oriented heatsinks... I did not know they were so small, or I would not have ordered them:
 

 
The results from just that, with a fan blowing over them, however, were pretty impressive:
 

 
At this point I was like "Wowee, this actually works quiet well".  These temps are in an hour plus long gaming session in Cyberpunk 2077, at 5120 x 1440 with Ray Tracing fully cranked including the last setting being on "Psycho" - so pretty much the highest load I can throw at the card outside of Mining.
 
As you can see, the net drop in temps was already as little as 1C in some areas, but as much as 8.9C on one of the Memory iCX sensors!
 
I decided to go "overboard" and get more next, resulting in this look after some tinkering with the setup (I'll add a picture of what it currently looks like in a second post) :
 

 
And as expected, even with no thermal pads between the backplate & the VRM areas, we got further drops in temps, at the same settings in game in over an hour of playing again.  Here's a comparison of the original (no heatsinks) configuration vs what I'm running now:
 

We've now gone up to +1000MHz memory OC, and despite that higher clock, memory temps are 11.6C, 5.9C & 3.2C cooler respectively!
 
Feel free to post your own heatsink setups & results, I want this to be sort of a comparison of notes, and sharing of information type thread, for both 3090 XC3s, 3090 FTW3s & Kingpins... Throw in your non-eVGA 3090 too if you have one!
post edited by Dabadger84 - 2021/02/24 22:16:24

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 18:46:37 (permalink)
    Next step is going to be getting thermal pads between the backside of the GPU die, and VRM areas, and the backplate... which I would love to know if anyone has any idea what size to get - I'm guessing it's .5mm thicker than the vRAM size, but not sure what exactly that size is on the Kingpin specifically, still 1.5mm or maybe 1mm?
     
    Going to shut down & get a picture of the current heatsink layout, it's slightly different than the final layout pic in the above post - I adjusted them after looking at Buildzoid's PCB review & realizing the places I put the VRM heatsinks were kind of wrong.
     
    EDIT: 
    SCROLL DOWN FOR FTW3 & XC3 backside guide pics
     
    Edit 2:
     
    GUIDE TO KINGPIN LAYOUT & THERMAL PAD SIZES IN THIS POST LATER IN THE THREAD IF YOU WANT TO SKIP FORWARD: https://forums.evga.com/FindPost/3228558 
    post edited by Dabadger84 - 2021/02/24 22:00:29

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:14:40 (permalink)
    Some pictures of the current (probably final) layout:
     


     
    And yes if you want maximum efficiency with the heatsinks, you definitely want a fan on them.
     
    Links to the heatsinks (the black/newer ones), currently out of stock on Amazon I believe: https://smile.amazon.com/gp/product/B07BDKN3XV/
     
     

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    anchang233
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:21:13 (permalink)
    Whats your MEM temp during mining? Also which MEM readout is the backside?
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:33:25 (permalink)
    anchang233
    Whats your MEM temp during mining? Also which MEM readout is the backside?



    I don't really do mining.  I tried it out previously, and the junction temp peaked at 82-84C during Ethereum mining.  That was with the first-try of the heatsinks (just the small silver ones) with a fan on it.  So I would assume they'd be slightly lower now.  Keep in mind, The Memory Junction Temp is always a fair bit warmer than the iCX Memory readouts, because (we think) the Junction Temp is from inside one of the memory chiplets, so it's an actual internal temp.
    I would assume the hottest of the 3 temps are the backside vRAM (so Mem2) - it only makes sense, but I don't know that for sure.  I was really hoping Buildzoid would touch on it during his PCB analysis, but he didn't point out any of the iCX sensors on the Kingpin :(

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    anchang233
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:53:23 (permalink)
    Dabadger84
    anchang233
    Whats your MEM temp during mining? Also which MEM readout is the backside?



    I don't really do mining.  I tried it out previously, and the junction temp peaked at 82-84C during Ethereum mining.  That was with the first-try of the heatsinks (just the small silver ones) with a fan on it.  So I would assume they'd be slightly lower now.  Keep in mind, The Memory Junction Temp is always a fair bit warmer than the iCX Memory readouts, because (we think) the Junction Temp is from inside one of the memory chiplets, so it's an actual internal temp.
    I would assume the hottest of the 3 temps are the backside vRAM (so Mem2) - it only makes sense, but I don't know that for sure.  I was really hoping Buildzoid would touch on it during his PCB analysis, but he didn't point out any of the iCX sensors on the Kingpin :(


    Hmm that's pretty good. The Strix/Gaming X Trio is at or above 90C according to HWINFO, FE is above 100C constantly, so that's pretty good improvement with the hybrid.
     
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:56:34 (permalink)
    anchang233
     
    Hmm that's pretty good. The Strix/Gaming X Trio is at or above 90C according to HWINFO, FE is above 100C constantly, so that's pretty good improvement with the hybrid.
     



    I assume that's junction temp?  That's partly the Hybrid Cooler & partly the heatsinks, I had the first set of silver heatsinks on while doing that mining test to see what my temps/load wattage was like.

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    anchang233
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 19:57:44 (permalink)
    Dabadger84
    anchang233
     
    Hmm that's pretty good. The Strix/Gaming X Trio is at or above 90C according to HWINFO, FE is above 100C constantly, so that's pretty good improvement with the hybrid.
     



    I assume that's junction temp?  That's partly the Hybrid Cooler & partly the heatsinks, I had the first set of silver heatsinks on while doing that mining test to see what my temps/load wattage was like.


    Yeah junction temperature
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 21:06:11 (permalink)
    So apparently backside vRAM thermal pads are supposed to be 2mm... I'm going to order 1mm (for the backside of the GPU die, I think that will be the right size), 2mm & 3mm, with a little 1.5mm as well just in case.
    That's more than I planned on spending on the thermal pads, but at least I'll have a little bit of everything in case I need it.

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    anchang233
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 21:07:18 (permalink)
    Dabadger84
    So apparently backside vRAM thermal pads are supposed to be 2mm... I'm going to order 1mm (for the backside of the GPU die, I think that will be the right size), 2mm & 3mm, with a little 1.5mm as well just in case.
    That's more than I planned on spending on the thermal pads, but at least I'll have a little bit of everything in case I need it.


    Which ones are the really good ones? Thermal grizzly is super expensive and I don't know the other brands very well.
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 21:12:11 (permalink)
    anchang233
    Dabadger84
    So apparently backside vRAM thermal pads are supposed to be 2mm... I'm going to order 1mm (for the backside of the GPU die, I think that will be the right size), 2mm & 3mm, with a little 1.5mm as well just in case.
    That's more than I planned on spending on the thermal pads, but at least I'll have a little bit of everything in case I need it.


    Which ones are the really good ones? Thermal grizzly is super expensive and I don't know the other brands very well.



    I think Fujipoly is the "best" brand, I'm just buying some regular-grade ones that are rated at 6W/mK - I'm just trying to get SOME heat transference from the backside VRM & die areas to the backplate (and then to the heatsinks), not looking to spend a $100+ on thermal pads :-D $55 is bad enough - but mine is only that much because I'm buyin' 4 different kinds, and 3 of the 4 are 200mm x 200mm sheets so they're quite big, way more than I'll need (I think).

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    Clovis559
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 21:31:44 (permalink)
    Yo, I wish I had a more scientific way to measure these for you:

     
    It's weird we think alike, but from what I seen, Fujipoly doesn't have a high quality pad at 2mm:

     
    I actually tried stacking them, but the performance vs the Ziitek pads on the front wasn't.. mind blowing. Ziitek makes 11 W/ mk pads, and so the pads you have might be good, who knows.
     
    I think next time I would just go with the brand that makes a 2mm. Fyi the pad behind the GPU is shorter.
     


    Hope that helps
    post edited by Clovis559 - 2021/02/10 21:34:29
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 22:30:14 (permalink)
    Clovis559
    Yo, I wish I had a more scientific way to measure these for you:

     
    I actually tried stacking them, but the performance vs the Ziitek pads on the front wasn't.. mind blowing. Ziitek makes 11 W/ mk pads, and so the pads you have might be good, who knows.
     
    I think next time I would just go with the brand that makes a 2mm. Fyi the pad behind the GPU is shorter.
     


    Hope that helps




    Yeah I figured the GPU-die specifically needs to be thinner cuz the stuff on the back is pretty thicc.
     
    So the memory specifically is 2mm?  I'm guessing the memory chip themselves are like .5, meaning I might need 2.5 for the areas not having chips... but then the VRM areas do have the little other things on the back so maybe 2 would be okay?
     
    I think I'm just gonna buy 1mm-2mm-3mm and go with that.  I don't want to get the backplate off until I have the pads to replace any I might mess up, so I'll just get some of each & hope that covers everything.
     
    I'll look up the Ziitek ones, probably get some of that too.  I'd rather have too much than not enough.

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    Clovis559
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 22:32:53 (permalink)
    Dabadger84
    Clovis559
    Yo, I wish I had a more scientific way to measure these for you:

     
    I actually tried stacking them, but the performance vs the Ziitek pads on the front wasn't.. mind blowing. Ziitek makes 11 W/ mk pads, and so the pads you have might be good, who knows.
     
    I think next time I would just go with the brand that makes a 2mm. Fyi the pad behind the GPU is shorter.
     


    Hope that helps




    Yeah I figured the GPU-die specifically needs to be thinner cuz the stuff on the back is pretty thicc.
     
    So the memory specifically is 2mm?  I'm guessing the memory chip themselves are like .5, meaning I might need 2.5 for the areas not having chips... but then the VRM areas do have the little other things on the back so maybe 2 would be okay?
     
    I think I'm just gonna buy 1mm-2mm-3mm and go with that.  I don't want to get the backplate off until I have the pads to replace any I might mess up, so I'll just get some of each & hope that covers everything.
     
    I'll look up the Ziitek ones, probably get some of that too.  I'd rather have too much than not enough.


     
    I just eyeballed it! There's no way you could tell me the coolant temp of a Kingpin like they have for Corsair AIO's etc, I could set my Chiller to that and tell you what temps I get if you wanna get crazy with an AIO on the back side.
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 22:41:46 (permalink)
    I don't think there's any way to get coolant temp no.
     
    How thin did you go for the back of the GPU die?  I'm trying to determine if I should bother buying 1.5mm pads at all or just stick to 1-2-3.

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 22:47:17 (permalink)
    Heck, do I even need 3?  I think maybe not O_o  Thinking about it:
     

     
    I feel like those areas on the backside of the VRMs mostly have areas thicker than the vRAM chips... so I'm not seeing where 3mm would actually be necessarily needed.  Maybe on the one area where there's a VRM on the other side, in between the two memory rows on the left-bottom area.
    Maybe I'll just order a smaller thing of the 3mm just in case.
     
    Edit: think I got a good smatterin' of pads figured out:
     

     
    Hopefully that's not a waste lol
    post edited by Dabadger84 - 2021/02/10 22:54:11

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    Clovis559
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 23:23:18 (permalink)
    Don't judge this picture! I'm fixing what you see coming up here, The plate currently sits about 2mm away from the memory because it's pushed out on the edges. I didn't cut the thermal pads right. Luckily I didn't because it looks like at the top I almost hit something.
    That should leave the middle at 1mm , but instead I had to use 2mm of pads in the middle. 
     

     
    But I don't like guessing. You know, if we keep getting crazy with stuff we'll need measurements. I bought one of these just now: https://www.amazon.com/gp/product/B017KUC6XQ/ref=ox_sc_act_title_1?smid=A1JAAL829ACROK&psc=1
    I can get us better measurements on Friday.
     
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    EvgaUser2711201
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/10 23:39:15 (permalink)
    Across the border ive been having a hard time finding quality thermal pads with a decent thermal conductivity.
    ~50x50 fuji for 50-70$ isnt happening.
    1.2w ~ 2.0w conductivity is about all I can find on amazon. 


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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 00:52:59 (permalink)
    Clovis559
    Don't judge this picture! I'm fixing what you see coming up here, The plate currently sits about 2mm away from the memory because it's pushed out on the edges. I didn't cut the thermal pads right. Luckily I didn't because it looks like at the top I almost hit something.
    That should leave the middle at 1mm , but instead I had to use 2mm of pads in the middle. 
     
    snip
     
    But I don't like guessing. You know, if we keep getting crazy with stuff we'll need measurements. I bought one of these just now: https://www.amazon.com/gp/product/B017KUC6XQ/ref=ox_sc_act_title_1?smid=A1JAAL829ACROK&psc=1
    I can get us better measurements on Friday.
     




    Wouldn't it be prudent to figure out what size you need in the other areas & just put pads everywhere under the coldplate to avoid any possibility of contacting something with the memory plate & shorting it out?  Like just doing 1mm everywhere else just to make sure shorting doesn't happen I mean. 
    I'm really curious if I'm actually gonna need that 3mm for anywhere under there.  If not, I'll figure out a use for it :-D might redo some of the cooling areas on one of the two laptops I got goin' since they're back to "repairing trust factors" on CSGO accounts again.  

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    Clovis559
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 00:59:06 (permalink)
    Dabadger84
    Clovis559
    Don't judge this picture! I'm fixing what you see coming up here, The plate currently sits about 2mm away from the memory because it's pushed out on the edges. I didn't cut the thermal pads right. Luckily I didn't because it looks like at the top I almost hit something.
    That should leave the middle at 1mm , but instead I had to use 2mm of pads in the middle. 
     
    snip
     
    But I don't like guessing. You know, if we keep getting crazy with stuff we'll need measurements. I bought one of these just now: https://www.amazon.com/gp/product/B017KUC6XQ/ref=ox_sc_act_title_1?smid=A1JAAL829ACROK&psc=1
    I can get us better measurements on Friday.
     




    Wouldn't it be prudent to figure out what size you need in the other areas & just put pads everywhere under the coldplate to avoid any possibility of contacting something with the memory plate & shorting it out?  Like just doing 1mm everywhere else just to make sure shorting doesn't happen I mean. 
    I'm really curious if I'm actually gonna need that 3mm for anywhere under there.  If not, I'll figure out a use for it :-D might redo some of the cooling areas on one of the two laptops I got goin' since they're back to "repairing trust factors" on CSGO accounts again.  




    That’s why I got the measuring tool, because right now I’m eyeballing it with a ruler. Hopefully I’ll be able to measure everything on the back, share, we can and go from there! Then design what ever craziness we’re going to design.
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 13:17:25 (permalink)
    Clovis559
     
    That’s why I got the measuring tool, because right now I’m eyeballing it with a ruler. Hopefully I’ll be able to measure everything on the back, share, we can and go from there! Then design what ever craziness we’re going to design.



    I might pick one of those up myself depending on how sketchy things are once my thermal pads come in which will hopefully all be here by Tuesday.

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    anchang233
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 19:08:42 (permalink)
    Dabadger84
    Clovis559
     
    That’s why I got the measuring tool, because right now I’m eyeballing it with a ruler. Hopefully I’ll be able to measure everything on the back, share, we can and go from there! Then design what ever craziness we’re going to design.



    I might pick one of those up myself depending on how sketchy things are once my thermal pads come in which will hopefully all be here by Tuesday.


    FTW3 Ultra got here early, VRAM junction temp is much higher than EVGA's readout
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 19:43:47 (permalink)
    anchang233
     
    FTW3 Ultra got here early, VRAM junction temp is much higher than EVGA's readout



    Unfortunately the Junction Temp readout wasn't available in HWInfo yet when I last had my 3090 FTW3 Hybrid, so I can't really compare notes on that aspect.
    But for the Kingpin, pre heatsinks, it was only 4C higher than the highest iCX Memory temperature... so I imagine in more regular airflow situations on the FTW3 Ultra it'd be... 8-10C higher perhaps?  Keep in mind, the iCX sensors are most likely edge temps on the given things they're reading the temperature of - the Memory Junction Temperature is (we assume, and mostly is) an internal TJunction from one of the memory chips - so that's more of what they're actually running at internally... but also keep in mind GDDR6X can run up to something like 110C internally before anything "bad" happens.

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    MiztahSparklez
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 21:17:21 (permalink)
    I think this also applies to other 3090 cards.. but I've only got the memory stuck on for now and I'm seeing a 6 degree drop in junction, and 2-4 degree drop for memory.  Most importantly, gpu boost clocks are almost a solid 2050+ (hybrid).
     
    In the Pic I have heatsinks for the VRMs, but I haven't attached it yet since I haven't put thermal pads underneath the back plate.
     
    Unfortunately, I had to pick low profile heatsinks (4mm) to clear the vertical GPU mount bracket.  I'm waiting for my 90mm fan to come so I can put it directly behind the card to cool these better.  Right now I just stuck a fan behind the computer blowing into the case, as the case fans on the bottom seem to be blocked by the vertical mount (running at higher RPMs don't change the temperatures much).
     
    I would probably advise against the ICEPC brand, since they have their logo printed on the block.  I would have much rather had the plain ones.
     

    Attached Image(s)

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/11 23:25:35 (permalink)
    MiztahSparklez
    I think this also applies to other 3090 cards.. but I've only got the memory stuck on for now and I'm seeing a 6 degree drop in junction, and 2-4 degree drop for memory.  Most importantly, gpu boost clocks are almost a solid 2050+ (hybrid).
     
    In the Pic I have heatsinks for the VRMs, but I haven't attached it yet since I haven't put thermal pads underneath the back plate.
     
    Unfortunately, I had to pick low profile heatsinks (4mm) to clear the vertical GPU mount bracket.  I'm waiting for my 90mm fan to come so I can put it directly behind the card to cool these better.  Right now I just stuck a fan behind the computer blowing into the case, as the case fans on the bottom seem to be blocked by the vertical mount (running at higher RPMs don't change the temperatures much).
     
    I would probably advise against the ICEPC brand, since they have their logo printed on the block.  I would have much rather had the plain ones.



    Yes, this definitely applies to all 3090s.  I plan to add layouts for the 3090 FTW3 & 3090 XC3 soon, I just have to find quality shots of the PCB on both sides to know where the "target areas" are for the back side in terms of adding thermal pads & heatsinks optimally.

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/12 00:00:58 (permalink)
    Marked up PCB pics of the eVGA RTX 3090 FTW3 Ultra/Hybrid PCB for those wanting to thermal pad/heatsink their backplate area - do not forget the lil' bastard VRM that's near one of the mount holes, it's important because it's a memory VRM:
     

     

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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/13 01:13:25 (permalink)
    So the Thermal Pads shipped todae, looks like one set of them isn't slated to be here til Wednesday... the wait continues.  Looking forward to it though!
     
    @Clovis since you merced your card already, how many screws were involved in removing the backplate, or do you remember?

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    _Gir_
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/13 17:18:34 (permalink)
    I've noticed that the messaging about pad size is inconsistent from EVGA.  I am starting to think that sometimes they're just giving us the clearance between parts and we should size up appropriately for decent pad compression.  Or sometimes it's for the pads they use which will likely have different firmness/density than what we'll purchase aftermarket.
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    Dabadger84
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/13 21:17:03 (permalink)
    _Gir_
    I've noticed that the messaging about pad size is inconsistent from EVGA.  I am starting to think that sometimes they're just giving us the clearance between parts and we should size up appropriately for decent pad compression.  Or sometimes it's for the pads they use which will likely have different firmness/density than what we'll purchase aftermarket.



    Indeed, that's why I got a smattering of everything.  1mm, 1.5mm, 2mm & 3mm incoming - got the most of the 2mm I think, cuz I'm pretty sure that's what I'll need for most of what I want to "cover" with thermal pads.  The 3mm is probably not going to get much use, but I got it anyway just in case.  If I don't use it at all on the video card I'll find another use for it, like redoing some ancient 2012/2014 internals on the old laptops I use for "CS:GO Trust Factor repairs" lol

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    MiztahSparklez
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    Re: 3090 (Kingpin) - Get that backside VRAM cool! Also: Thermal Pad size (backplate side)? 2021/02/13 23:32:19 (permalink)
    _Gir_
    I've noticed that the messaging about pad size is inconsistent from EVGA.  I am starting to think that sometimes they're just giving us the clearance between parts and we should size up appropriately for decent pad compression.  Or sometimes it's for the pads they use which will likely have different firmness/density than what we'll purchase aftermarket.



    The back vram on my ftw3 ultra was more like 2.5 instead of 2 like they said... I was able to use 3mm for my rear vrm (bare circuit board on the ftw3 ultra) and the stock 2.25/2.5 pads from the front vram side for the rear vram and back plate when I changed out my hybrid cooler. 2mm gelid extreme didn’t have enough compression, it barely touched and 2+1mm pads stacked was way to high. 3mm gelid has about the same give as the stock putty.

    One thing I did notice that dropped my hybrid temps was to use new thermal grease on the gpu chip and between the AIO pump and copper hot plate that attaches to the vram. With adequate airflow around all the heat sinks , I was able to get around -8 junction temp. -4 or so for everything else. If I was able to horizontal mount, I’d probably get even more.
    post edited by MiztahSparklez - 2021/02/13 23:34:33
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