the_Scarlet_one
The Fujipoly pads have no give to them, which causes the majority of the bowing.

Are you using the stock backplate? If so, there wasn’t much need to change the pads out unless you needed to remove the backplate.

Personally, I like the primochill pads as they have seemed to last longer and have slightly more give to them for conforming to the products they are covering.

Razgriz2006

glocked89
3090 ftw3 here. I replaced the backplate vram pads with TG minus pad 8 3mm. Definitely a slight bow there, but the minus pads are pretty squishy so I think I'm okay.
 
I ran out of 3mm on one section of the vram on the back so I stacked a few spare pads there and going to replace with Fujipolys (minus pad 8s all sold out). I know the 17w/mk are super stiff so I bought the 11w/mk stuff. I was hoping the 11w/mk version has better squish.
 
Anyone have any experience with Fujipolys 11w(x-e) vs 17w(xr-m)?

What are your Vram Tj max temps?

Kylearan

Razgriz2006

gsrcrxsi
well, why did you use the wrong size pads?

Per EvgaJacob the back Vram is supposed to use 2mm pads. Ive heard of some folks on here using 3mm very soft pads but they also get Backplate bow.
 
My thought is to try some 1.5 mm 17w/mk fujipolys tonight. Can anyone comment on if those do better or not?

17 w/mk Fujipoly pads are highway robbery.
It takes so many packs just to do one side of a card.  The packages are THAT small.
Paying $37 for a 60mm * 50mm square?  Are you really that rich, man?
 
Here.  Instead of throwing away your money, buy a collection of these of different thicknesses.
You can get 0.5mm, 1.0mm, 1.5mm and 2.0mm for the same price as ONE fujipoly 17 w/mk pad.
The 200mm * 200mm * 1.5m pad is out of stock, you can buy the 100mm*100mm version of that.  
 
https://www.amazon.com/gp/product/B086VYKZN4/ref=ox_sc_saved_title_10?smid=A2XFN3HMWVK6C2&th=1
 
Buy the 200mm * 200mm ones unless they're OOS.
Then you can practice experimenting on the backplate until you find the proper thicknesse that works best and gives you decent temps and improvement over stock.
 
Once you know the exact thickness, THEN buy something better, like Gelid 12 w/mk pads or Thermalright Odyssey 12.8 w/mk pads! :)
 
You can buy large, better value for the size, samples like these, and then have good heat transfer.
 
https://www.aliexpress.com/item/33011777612.html
https://www.aliexpress.com/item/1005002064420392.html
https://www.aliexpress.com/item/4000134361013.html (best price for 120mm * 120mm).

anchang233

Dabadger84
So it's 1.5mm for the vRAM areas of the backplate on the 3090 FTW3?  Wonder if it's the same measurements for the Kingpin.  I'm debating buying some thermal pads for other areas of the backside of my card, wondering if I should get 1.5mm or 2mm, or a mixture of both, since I'll be putting some in areas other than the vram chiplets.

If I remember correctly, you got a FTW3 3090 Hybrid, is it possible for you to get some temps on the back of the card? Thinking about doing a hybrid kit but I doubt that's going to affect the back VRAM temp :(

Razgriz2006

Well they say fools are easily separated from their money... the 1.5mm fujipolys are already on my desk.

If i dont get equivalent to stock i will try your recommendations

Dabadger84

glocked89
I replaced the thermal pads and added heatsinks to the back. Also have a fan blowing on them too. Dropped my memory junction temps by 10c. Not an exaggeration either, I topped out at 92c on furmark prior and now I'm peaking at 82c.
 
https://imgur.com/a/a0oP0T3

That's what I'm figuring with the heatsink layout I'm doing - people that have higher temps will see larger drops in temperature than I did.  I started out with fairly docile temps compared to most, so the fact that even I'm seeing 3-11C drops in memory temps is pretty darn impressive.
I'm going to be replacing probably all of the thermal pads between the backplate & the card, and adding more in areas I want them in, on probably Tuesday, once all the pads I ordered arrive.
I'll have to document the heights of stuff on the back to figure out what exactly is needed in each place, and how squished the memory pads are that are on the card stock.

komicaaa
i used Thermalright ODYSSEY THERMAL PAD 2.0mm on the backside Vram
 

Temp is not bad
 
 

 
That is impressive

Razgriz2006
Whats stopping us from putting copper heatsinks directly on the ram chips with thermal paste?
 
I am pulling my hair out (already bald) trying to make pads stick to a plate to then transfer to a heatsink... why not cut out the middle man?