3090 FE Mining

Liam 91 x · 21 Aug 2021 at 20:16

Hi,

I’ve got a 3090 Founders Edition, I have done the top thermal repad with 1.5mm (I haven’t done the bottom half + repaste). My temperatures have gotten worse than they were standard. What could possibly be the problem? Surely just doing the top side would make a difference even if it was minimal.

gpuerrilla · 21 Aug 2021 at 20:30

Sounds like a bad assembly. As its easy to take just the back off can you remove and check it over (or photograph).

Liam 91 x · 21 Aug 2021 at 20:33

Th0nt said:
Sounds like a bad assembly. As its easy to take just the back off can you remove and check it over (or photograph).

I’ve took the back off again and checked and I still can’t see anything wrong with what I’ve replicated

FlyingFish · 21 Aug 2021 at 20:41

In taking the backplate off, you might of disturbed something on the front/core side, which might be where your high temps are from.
That is if you havent missed anything on the rear?

What temp has increased?

FlyingFish · 21 Aug 2021 at 20:42

Oh and do you have a picture of what youve done you can show us.

Liam 91 x · 21 Aug 2021 at 20:43

FlyingFish said:
In taking the backplate off, you might of disturbed something on the front/core side, which might be where your high temps are from.
That is if you havent missed anything on the rear?

What temp has increased?

GPU has decreased
VRAM has increased

gpuerrilla · 21 Aug 2021 at 20:44

If you have enough pads to do the front you may aswell strip it down, take your time, and do the lot. As @FlyingFish mentioned something might need scoping now rather than later!

(Unless you have forgot your fan profile in AB- one time I had it on really low RPM quiet settings and thought something was wrong with my cooling).

Liam 91 x · 21 Aug 2021 at 20:46

Th0nt said:
If you have enough pads to do the front you may aswell strip it down, take your time, and do the lot. As @FlyingFish mentioned something might need scoping now rather than later!

(Unless you have forgot your fan profile in AB- one time I had it on really low RPM quiet settings and thought something was wrong with my cooling).

I’ve checked and double checked my settings were exactly as they were before and after just my GPU Temp has dropped but VRAM Temp has gone up.

gpuerrilla · 21 Aug 2021 at 20:48

OK check the fans are spinning. Sounds obvious but if a fan isn't then no wonder the VRAM could be higher.

FlyingFish · 21 Aug 2021 at 20:51

Core has decreased? By how much? How much has the vram gone up by?

Your core should be the same give or take.

Liam 91 x · 21 Aug 2021 at 21:04

Sorry let me rephrase!

I’ve left it run a little while and my GPU has stayed the same, VRAM has gone up 6C but is fluctuating 8C

Falkentyne · 22 Aug 2021 at 01:04

Liam 91 x said:
Hi,

I’ve got a 3090 Founders Edition, I have done the top thermal repad with 1.5mm (I haven’t done the bottom half + repaste). My temperatures have gotten worse than they were standard. What could possibly be the problem? Surely just doing the top side would make a difference even if it was minimal.

What thermal pads did you use and what thickness? Sounds to me like you didn't remove the SLI cover before reassembling the backplate, creating warping.

itchy · 22 Aug 2021 at 01:18

We need to see what you have done.

Also why did you take apart a good card to re apply thermal compound?

I just dont get it, why? Did you have an issue with thermals before hand or not?

chroniclard · 22 Aug 2021 at 01:35

Are 1.5mm pads thick enough for a 3090FE?

Liam 91 x · 22 Aug 2021 at 06:51

I used thermalright odyssey 1.5mm and yes I removed the SLI cover.

I’ve only changed the backplate thermal pads nothing else, it was running 98C Junction that’s why I wanted to change the top - the bottom is untouched so still original thermal pads and paste.

1.5mm is thick enough for 3090 that’s what’s recommended.

fs123 · 22 Aug 2021 at 10:51

The better pads to use are Gelid Extreme since they are softer/more compressible than the Thermalright Odysseys. I'm not sure 1.5mm are thick enough for the rear chips. I know the 3080 FE needs around 2-3mm pads for the rear to make good contact with the metal back panel.You will have to open it back up and check if there are back panel indents on the pads. If there aren't any compression marks then get some thicker pads.

gpuerrilla · 22 Aug 2021 at 10:53

They are thick enough, the rear actually has memory there on the 3090 whereas the 3080 your filling the gaps.

Liam 91 x · 22 Aug 2021 at 10:56

I will take it apart when I get home and post up a picture of the work done but definitely 1.5mm is thick enough I’ve only done the top not the bottom.

Richard Childs · 22 Aug 2021 at 13:58

You need to do both sides not just 1 side, I used same thermal pads as you did on 2 rtx 3090 FE and both dropped at least 30c (one of them 40c). The temps your seeing are just whichever vram is hottest and by not doing them all it'll keep throttling.

Also don't use the previous thermal pads as template use diagrams found online. The thermal pads near the V shape part of the card need to be much bigger with diagonal cuts

Liam 91 x · 22 Aug 2021 at 14:26

Richard Childs said:
You need to do both sides not just 1 side, I used same thermal pads as you did on 2 rtx 3090 FE and both dropped at least 30c (one of them 40c). The temps your seeing are just whichever vram is hottest and by not doing them all it'll keep throttling.

Also don't use the previous thermal pads as template use diagrams found online. The thermal pads near the V shape part of the card need to be much bigger with diagonal cuts

So because I’ve done the top the actual high heat is now the bottom? If I do the bottom do I need to change the thermal paste? The card itself is 2 weeks old.