this post was submitted on 13 Nov 2023
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Hot Spot temperature down from ~ 102°C to ~ 75°C on my gold old RX 6800xt just by deshrouding and putting a huge chunk of thermal pad between board and backplate? (alien.top)
submitted 10 months ago by [email protected] to c/[email protected]
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As long as I had my XFX 6800xt, I had some temperature problems. The GPU temperature went up to 80°C and the hot spot temperature usually stood at 105°C, but occasionally went up to 110°C. So the fans were screaming as if they were being slaughtered.

So I removed the shroud, replaced the 90mm fans with 120mm fans, which I had lying around in my "tech box" and which are now hanging on the heatsink through zip-ties. And a 100x100 3mm thick thermal pad between the backplate and the back of the board.

Result: Furmark (as an extreme example) just manages to bring the respective temperatures to 57°C GPU temperature or 75°C hot spot temperature.

I would never have thought that an investment of €8 could make such a difference

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[–] [email protected] 1 points 10 months ago (3 children)

My 6800xt has bad hotspot temps and I've wanted to give it new pads for awhile. It has only gotten bad in benchmarks though (100-110C where GPU temps are 70max).

That's until recently when I started playing CS2 and this is the first game that has started to push my hotspot temps near 100C in actual use.

My question is do you or anyone know what kind of performance/stability improvements I can get by getting my hotspot temps under control?

[–] [email protected] 1 points 10 months ago

My question is do you or anyone know what kind of performance/stability improvements I can get by getting my hotspot temps under control?

Besides Games:

  1. use fancontrol to control your... fans: https://getfancontrol.com/ and create a fan curve that is useable
  2. if possible, deshroud your GPU. The plastic covers a lot of hot air.
  3. when you have a backplate on your GPU, check if its thermically connected to the board via thermalpads. if not, get some thermalpads (not the cheap one I had but pads with a high heat transfer of at least 10 W/(m*k). Also be sure, that your backplate is metal not plastic
  4. cover at least the areas of the VRM and VMEM like in this picture (not mine, I just found it)
  5. repaste your GPU. Or use these: Thermal Grizzly Kryosheet. But they are a) expensive and b) electronically conductive, so make sure it sits on your gpu and does not touch anything else. But they have a great impact on heat transfer
  6. Or, if you have the money, get a Raijintek Morpheus 8069. Add some nice fans to it and it should help you

Ingames:

  1. don't use TAA with high settings, that will heat up your mem
  2. use the chill feature that is included in the drivers. You limit the frames, therefore your GPU doesn't have to work as hard to get high FPS.
  3. Shadows/RTX in games also use a lot of power... seriously.
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