Hi. I saw The_Scarlet_One's post about thermal pads awhile ago. Here is the quote I wanted to post about.
 
"The thermal rating on the pads has shown to be less honest than what most assume, from what I have been reading lately. I guess the company can use their own specific testing methods to make their product look better. I noticed that people (to include myself) have purchased the “extreme 17w/mk fujipoly thermal pads” just to find out they perform almost exactly the same as the 5w/mk pads because all of the other surfaces become limiting factors."
 
I have a EVGA 3080 FTW Ultra that I am putting a water block on. I was trying to get the Optimus WB first but that guy is unreliable yet according to him he has alot of science knowledge, putting together mars rover and stuff (Something like that). The Fujipoly pads across the entire backplate caught my eye on the Optimus WB. I am going to do the same thing but Im at a fork in the road over AYIYUNNI 7w on the entire backplate versus Fuji 17W (maybe 11W) (across the backplate where the gpu, vrm and mosfets are) and AYI 7w over everything else. What am I trying to achieve? Well I am putting it together right now so if I can do a few extra little things to get the lowest temp thats okay with me. If money is no issue what is your recommendation? Based on what Scarlet has said in the past, you might say just get the AYIYUNNI, just wanted to double check. First water cooling build btw.
 
Thanks.

Dabadger84
 
 
I would say get the Ayiyunni myself, the backside of the 3080 is mostly dissipating PCB heatsoak and the heat generated from the components in the immediate areas above them - it will help in some areas quite a bit, and do just about nothing in others. 

Thanks. Im assuming the parts of the PCB that dont get hot and have the thermal pad over them will just heat up from the heat spreading thru out the pad. since heat travels to colder areas

Iv got a 3090 and just pumped the whole back plate full of thermal putty up to the LED and slits in the PCB.
But that was mainly because using the pads that came with EKWB back plate amplified the coil whine.

That's fairly accurate, the warmest areas of the back of the card & thereby the backplate would likely be the backside of the VRMs, & the GPU die area.  The vRAM on the 3080 not being double-stacked on either side of the PCB like it is on the 3090 makes them slightly less of a heatsoak source.
 
It would be interesting to see what good some thermal pads or tape with heatsinks would do on the backplate of a 3080 though.  Imagine it'd be a less dramatic effect, but still a help.
 
With the 3090 Kingpin specifically, the backplate is thicker, but from what I understand (I haven't removed my backplate but I've seen stuff from people that have) there's thermal pads between it & the vRAM chiplets, and some other areas.  I'd love to see an image of what exactly the stuff looks like freshly after it's been pulled off the card the first time, unfortunately we never got a "disassembly" video from Gamers Nexus or anywhere because Kingpins were thrown straight at LN2 by most YouTube Reviewers - which is fair enough, but still, disappointing for me.
 
Based on what I've seen from what I already have on there, where some temps are going down more than others, I'm thinking adding the additional heatsinks will further help with that.
 
The ones I'm buying have the thermal tape pre installed... the tiny ones I already have (Do not recommend buying, the ENTIRE pack is almost entirely in the picture I posted earlier of the backside of my card currently): https://smile.amazon.com/gp/product/B084X4VMP9/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 and the ones I'm getting in tomorrow: https://smile.amazon.com/gp/product/B07BDKN3XV/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 that are bigger also have thermal tape already applied.
 
I'm sure it's not as effective as paste or a thin, better-heat-conductivity pad, but I am not stickin' crap to my card with paste lol

Dabadger84
Just what I have on there now has already dropped 4-6C off my load temps on 2 of the 3 memory iCX sensors, as well as dropping my Memory Junction Temp a few degrees, and other temps 1-3C as well, which is pretty crazy considering how little I've done so far:
 

 
Just those with a fan blowing over them has made that difference - granted, the 3090 is a whole 'nother beast because of the vRAM chips being on the back of the PCB too, but I imagine it will still help with the 3080's thermals to have more heat dissipation like you are planning to do.

How do you have those little aluminum heatsinks attached? What's your case cooling look like for airflow? I'd like to get my 3090 memory temps down, they are horrific. What did that get yours down to and at what memory speed? 
 
I'm tempted to give these guys a shot but not sure how I want to attach them. 

https://smile.amazon.com/...XKGXPP9Y1BT8&psc=1
 

Came across these today:
https://www.amazon.com/Watercool-HEATKILLER-Water-Block-microSW-X/dp/B075CLWNTX/ref=sr_1_2?dchild=1&keywords=Heatkiller+DIY&qid=1612863555&s=electronics&sr=1-2

What's to stop you from putting these on the back? (Only thing is that if you attached it right to the heatsink, you're mixing copper and aluminum.
 But does it matter if they're not in the loop together?
 

the_Scarlet_one

Lord Winchester

 
 
 Have you seen this before? It's a Backplate Waterblock, you clip on your gpu. Seems like they are quite new on the market.
 
 
The size is about 15 cm, but how big is the heat generating area on a Kingpin or ftw3 Backplate really? 

Here is a Facebook user that has one:

https://www.facebook.com/...66347393985&type=3

I can only see the Fotos. Does he say anything about temperature improvements?

Lord Winchester

 
 
 Have you seen this before? It's a Backplate Waterblock, you clip on your gpu. Seems like they are quite new on the market.
 
 
The size is about 15 cm, but how big is the heat generating area on a Kingpin or ftw3 Backplate really? 

Anyone have a link where this is sold?
 
Edit: https://mp5works.com/
 
Tempting

Lord Winchester

Clovis559

Lord Winchester

 
 
 Have you seen this before? It's a Backplate Waterblock, you clip on your gpu. Seems like they are quite new on the market.
 
 
The size is about 15 cm, but how big is the heat generating area on a Kingpin or ftw3 Backplate really? 

Anyone have a link where this is sold?
 
Edit: https://mp5works.com/
 
Tempting

I´m going to get one of these.
Too bad UK decided to leave the EU. Now i have to pay a Custom fee

Good news: The site lists prices in pounds. So no Customs fee.
Bad News: Website is out of stock.
 
The website only lists the outside of the tubing included as OD 4mm, that is going to make for some tiny tiny tubing.

osb40000

Dabadger84
Just what I have on there now has already dropped 4-6C off my load temps on 2 of the 3 memory iCX sensors, as well as dropping my Memory Junction Temp a few degrees, and other temps 1-3C as well, which is pretty crazy considering how little I've done so far:
 

 
Just those with a fan blowing over them has made that difference - granted, the 3090 is a whole 'nother beast because of the vRAM chips being on the back of the PCB too, but I imagine it will still help with the 3080's thermals to have more heat dissipation like you are planning to do.

How do you have those little aluminum heatsinks attached? What's your case cooling look like for airflow? I'd like to get my 3090 memory temps down, they are horrific. What did that get yours down to and at what memory speed? 
 
I'm tempted to give these guys a shot but not sure how I want to attach them. 

https://smile.amazon.com/...XKGXPP9Y1BT8&psc=1
 

They came with thermal tape pre-applied, as do the ones I'll be getting in today, which I'll be putting over the VRM areas & other places - the ones I have on now (in that picture) are quite small, but they do a decent job (apparently) based on the temp reductions I've already seen: https://smile.amazon.com/gp/product/B07BDKN3XV/ref=ppx_yo_dt_b_asin_image_o04_s00?ie=UTF8&psc=1 
 
An example of before vs after:
 
Before, at 2130MHz @ 1025mV, +250 memory OC:
 

 
After, at 2160MHz @ 1068mV, with +1000 memory OC:
 

 
So my temps went DOWN despite clocks going UP.  And that's just with the heatsinks in the picture in the quote above, so not exactly a whole lot going on yet, with a single 120mm fan running at ~1000RPM blowing air over them. 

Clovis559

Lord Winchester

Clovis559

Lord Winchester

 
 
 Have you seen this before? It's a Backplate Waterblock, you clip on your gpu. Seems like they are quite new on the market.
 
 
The size is about 15 cm, but how big is the heat generating area on a Kingpin or ftw3 Backplate really? 

Anyone have a link where this is sold?
 
Edit: https://mp5works.com/
 
Tempting

I´m going to get one of these.
Too bad UK decided to leave the EU. Now i have to pay a Custom fee

Good news: The site lists prices in pounds. So no Customs fee.
Bad News: Website is out of stock.
 
The website only lists the outside of the tubing included as OD 4mm, that is going to make for some tiny tiny tubing.

No customs for you I guess. I'm from Germany and with the whole Brexit situation it can be (depending on the custom officer) no import fee or or a bucket of Gold on top of the price. 
 
 
 
As for the tubing: They do a version with G1/4 Thread. I will get this and hook it up to the Cpu loop. Gpu itself goes in the second loop with an external radiator

Curious to see the results, that's a ton of surface area assuming that they can transfer the heat properly. May need to slap a 120mm fan on top of them.
 

Think I'm going to post a separate thread with a full workup of this cuz this is impressive stuff I think:
 
Before any heatsinks were applied, idle temps were as follows with probably 70-72F air (can't remember for sure):
 

And now, with an ambient of 71F and the new heatsinks:

 
The middle #s are the "lowest recorded".  Look at the differences, they're small, but at idles that close to ambient, they really mean something:
 
Then: 22C  22.4C  22.1C  23.4C  22.2C  23.5C  25.9C  25.3C  24.7C  23.7C
Now:  22C  22C     21.6C  22.9C  21.9C  22.9C  24.9C  24.7C  23.6C  22.6C
 
Everything across the board is lower.  Unfortunately I don't have junction temp idle from before cuz it wasn't a thing, that hadn't been released yet in HWInfo.

So far it's a bit of mixed bag - I think removing some of the heat-coverage I had on the one set of memory had a negative effect on one particular temperature.  But still, VRM temps are mostly lower (as expected now that I actually have heatsinks above them), and it looks promising, just need to do some fine tuning & maybe put a different fan that can sit further off the heatsinks, I think the deadzone in the middle is having negative effects too, before I had a different fan sitting on rubber standoffs blowing air on the littler heatsinks.
 
But, out of the 11 temperature readouts, 7 of them were lower with the newer setup than the original heatsink setup - and for the original "before" any heatsinks temps, memory readouts are 9.5C, 3C & 2C LOWER - and keep in mind the before heatsinks temps I have are with a LOWER OC as well - and VRM/PWR temps are lower across the board too, only 1C on some, but 3C on others.
 
Wish I'd done more thorough documenting of temps before doing the heatsinks at all, but that 9.5C drop/difference between a 2130MHz Core & stock memory before and the 2160MHz core, +1000MHz memory after is pretty impressive for what amounts to less than $40 worth of heatsinks being added.