wmmills
Luckily, my temps weren't that bad when i first got my card. I wasn't mining either, just gaming on very high settings at 4k. I knew they were only going to get worse so the Hybrid kit was going on at some point. The backside of the card was a different deal. I searched and searched to see if anyone did it the way i was thinking of, and did eventually, and there wasnt anyone i could get results off of from that particular setup/mod. So i just did it myself and it made a big difference. Thankfully cause i was gonna spend the money and go full custom loop for both the gpu and cpu, which i really didnt want to get into. Lol, though i understand what you mean about the heat comin outta that thing and thank goodness i don't have that much cause the little that does come out is enough. Summer must be terrible for you if your trapped in a small room!

Well it's bad enough that I have decided I can't deal with it.  Within 5 minutes I have to wander off and find cooler air.  As much as I greatly prefer pusher fans to pullers, I'm reversing the whole setup.  The fans I started with simply can't move enough air at 1500rpm.  I got some replacements just 15 minutes ago (some idiot seller on amazon would only allow you to buy two boxes, so I had to buy 2 boxes to my house and 1 to my office which took a day longer even though it's only 3/4 of a mile from my house,,,,,,go figure)
Tonight the flow reverses.  My desk is next to a window so I may be working on something to vent outdoors.  It's that much heat.  And I'm in a huge vaulted ceiling room that is open to our kitchen so there's a massive airspace to work with.
The extent of my gaming these days is every so often I fire up Wow and remember how great it "used" to be before they let it go to ****.

stang99x

wmmills
Luckily, my temps weren't that bad when i first got my card. I wasn't mining either, just gaming on very high settings at 4k. I knew they were only going to get worse so the Hybrid kit was going on at some point. The backside of the card was a different deal. I searched and searched to see if anyone did it the way i was thinking of, and did eventually, and there wasnt anyone i could get results off of from that particular setup/mod. So i just did it myself and it made a big difference. Thankfully cause i was gonna spend the money and go full custom loop for both the gpu and cpu, which i really didnt want to get into. Lol, though i understand what you mean about the heat comin outta that thing and thank goodness i don't have that much cause the little that does come out is enough. Summer must be terrible for you if your trapped in a small room!

Well it's bad enough that I have decided I can't deal with it.  Within 5 minutes I have to wander off and find cooler air.  As much as I greatly prefer pusher fans to pullers, I'm reversing the whole setup.  The fans I started with simply can't move enough air at 1500rpm.  I got some replacements just 15 minutes ago (some idiot seller on amazon would only allow you to buy two boxes, so I had to buy 2 boxes to my house and 1 to my office which took a day longer even though it's only 3/4 of a mile from my house,,,,,,go figure)
Tonight the flow reverses.  My desk is next to a window so I may be working on something to vent outdoors.  It's that much heat.  And I'm in a huge vaulted ceiling room that is open to our kitchen so there's a massive airspace to work with.
The extent of my gaming these days is every so often I fire up Wow and remember how great it "used" to be before they let it go to ****.

Lol, it sounds like you built yourself a torture room. It def sounds like you have some good ideas though, like venting the room air outside if possible. Yeah, i think most of us feel the same way about WoW anymore.... i left when Cataclysm first started.

I recently changed my pads with ktiticalpads (precuts 20w/mk they claimed). However, after replacing all pads I actually see memory temp goes up 10-15c. I will say the oem pads are decent enough. Just not sure about those thermal putty. I also repasted gpu chip with noctua H1, the core temperature dropped 5C. Oem thermal paste seems too thin and dry

Papawes
I recently changed my pads with ktiticalpads (precuts 20w/mk they claimed). However, after replacing all pads I actually see memory temp goes up 10-15c. I will say the oem pads are decent enough. Just not sure about those thermal putty. I also repasted gpu chip with noctua H1, the core temperature dropped 5C. Oem thermal paste seems too thin and dry

Yeah, thats not a good sign if your temps are going up. Either the pads arent as good as claimed, the heatsink/plate isnt touching enough or with enough pressure to cool the vram or maybe not at all. Def take a look and check that cause if the heatsink isnt taking heat away then your just suffocating them with pads/putty on there. Im sure you dont want to take it apart and have to reapply but pastes and pads are cheap compared to your gpu price.

I am planning on do doing the copper plate mod to my 3090 FTW3 Ultra so while I am doing this I wanted upgrade the thermal pads since I will have to replace them anyway.
I plan on using Gelid Extreme for replacing the thermal pads on the backplate but not sure what thickness or how much to get. Can anyone advise?

I been looking into these guys because they have a really good 3080 tear down video and the have custom sets for each GPU model to include 3090FTW3

Youtube: JaNoOwwtd1A
kriticalpads
.com
/
evga-3090-ftw3

Also on the site they list the following specs, if anyone wants to cross check please do so:

EVGA 3090 FTW3
Thin (1mm) and wide (10mm) stripes go on the grey power modules where EVGA used thermal putty, on both sides of the GPU die.
Thick (2.6-2.8mm) and narrow stripes go on the mosfets, on both sides of the GPU die.
Thinner VRAM pads (2.25mm) go on the front side (i.e. die-side) of the PCB.
Thicker VRAM pads (2.5mm) are now black and go on the back side of the PCB.

EVGATech_LeeM
 
3090/3080 FTW3 Pads:
 
1pcs: 7.7mm x 6.5mm x 2.75mm
2pcs: 53mm x 14mm x 2.25mm
1pcs: 37.5mm x 14mm x 2.25mm
1pcs: 15mm x 12mm x 2.25mm
1pcs: 110mm x 5mm x 2.5mm
 
3090/3080 FTW3 BP Pads:
 
2pcs: 51mm x 12mm x 2mm
1pcs: 38mm x 12mm x 2mm
1pcs: 14mm x 10mm x 2mm

 
Ordering Gelid Extreme to replace pads on both sides of my 3090 FTW3 Ultra Gaming. According to the EVGA Tech that I quoted, those are the thicknesses needed, however most kits I see that come precut include 1mm pads, but I see none listed above. Did EVGA use something else for this?   Also, since Gelid does not have 2.25, should I go to 2.50.
 

This helped me a lot. Thank you!

gmzombie
So i am another lucky one who got in the 3090 pad club. Lol. Anyways after reading a bunch on this subject I decided to change pads. after trying a few different pads and getting worse temps I did this. I got the gelid extreme 2.5 pads, the putty that is recommended and used the putty on the memory pads first. Just a thin layer over all memory pads and then uses those 2.5mm gelid pads. I also used notura cpu paste on the gpu itself along with replacing the putty for pads in the vrm. But i also did a light cover of putty on them too. Used a 1mm over those and used a 2.0m and a 1.0m on the other thin pad. Got my temps in a decent warm room to 90c and i found if i put a cpu cooler with fan in the back side of card i can drop the temps another 8c to 12c. Amazing. Ive ordered a big heatsink for the back and have fans for that. Just wanted to share my journey with it. Oh my old readings were 96c in a room with the window open and a fan on it.

This helped me a lot. Used some putty on the pads and saw 10c drop. Ive taken the card apart a dozen times in the past year trying to perfect it. So hard to get the temps on these under control. Your advice helped.
Edit: im using Thermalright Extreme 2mm+0.5 and a thin layer of paste.

Soooo it's not possible to mine on an aircooled 3090.  I measured everything out, had proper pad thickness (2.0mm is good for front and back) and verified via disasembly that everything was making good contact.  It doesn't matter, the vram on the back need active cooling that even a fan pointed at won't help.
 
You don't need 2.25mm pads.  The gap between the copper and the front vram is about 1.3mm based on the standoff height.  However you need to get above the metal gpu die package frame which is 2.5mm tall.  So the VRAM is 1.0mm high, so if you put 2.0mm pad on top you get 3.0mm total height, which is 0.5mm of compression then down to the GPU package.
 
I know 2.0mm is fine for the front VRAM because I do that on 3080Ti's without overheating and every GPU regardless of the AIB is going to have the same 2.5mm gpu die package.
 
If you're gaming and asking what pads to use in a repad job:
Inductors: 1.0mm
VRM: 2.5mm
VRAM front + back: 2.0mm
VRM back: 3.0mm
 
All of these visually made good contact with Gelid Extreme 12W/mK pads that are fairly squishy, and I calipered the heatsink and pcb to make sure I was hitting 20-30% compression ratios.  You need to warm up your pcb / pads a little bit (don't do it in a cold room), make sure to press them on with your thumb to squeeze out any air bubbles, etc.  Make sure they're cut fairly precise because there's some capacitors near the VRAM that you don't want getting pinched on a thermal pad.  This is basic stuff that should be standard on any GPU pad job.

IMO ignore the Kritical or Gelid Ultimate pads.  They're just so stiff that you're begging for trouble especially on a lot of 3000 series cards where they don't really use that many screws to clamp everything together.  On the 1000 series you would have 9 screws holding the heatsink down so you could get away with stiffer pads.

I bought a 3090 ftw3 ultra. I bought it on ebay, the card got very hot when mining was started, the core was under 80C and the memory was 110C, they already tried to change and even replaced the backplate from Bulsky with a thicker one and installed mini radiators, but apparently everything was unsuccessfully matched and poor-quality gaskets, as much as 3mm was put on the back panels and that even the textolite is bent.

 
I had to sort it out myself. It turned out like this.
 
I used such thermal pads, they have non-standard sizes
 
front
back
I put thermal pads 1.5mm on the backplate
 
I put a needle aluminum radiator 122mm * 38mm cut to length 290mm (the weight of this radiator is 1.2kg). I tighten with nylon ties 5mm * 500mm, working temperature up to 80C.
 
I connect two 120mm * 120mm fans through the splitter through the side 4pin connector on the card.
 
WOW it happened. Turn on dual mining ETH+ and test.
 
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