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Replaced thermal pads on RTX 3080

Specifically only the ones beneath the cooler, the four sides beside the chip. I didn’t replace the ones at the backplate. (Ventus)

There is a temperature improvement, but it’s not as amazing as what I see people have posted.

It used to run 106C at 100% fan, now it runs 102C at 79% and 92C at 100%.

Question is, is it because I didn’t go for the backplate pads? Also I saw a video where the guy applied thermal pads to the same locations as I did, but on the other side of the board, what’s that about?

If it is cause of the backplate pads, I think I might buy another set and do those, still running at over a 100C even at lower fan speed is not satisfiable. Thanks in advance.

What do you think?

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7 Comments

  1. The 3080 don’t have memories on the back, although if the back plate is metal it gonna help dissipating some heat, if is one of those carbon fibre looking plastic is not gonna help much. Other factors to have on account, ambient temperature, open case rig or close case system, the conductivity of the thermal pads 17w/mk or 12 w/mk or less.

  2. I have the Ventus 3080 and didn’t see the dramatic results either.
    I used 2mm pads and put paste on both sides of them.
    What I can push is:
    1260 core @ 0.731v, +865 mem, 80% fan – 96.5 mh/s
    48C core, 63 hot spot, 86 mem junction.

    What is your core set at and how much voltage is running to it? Voltage and heat are related.

    *edit to add: I didn’t do the backplate pad replacements, just left the stock ones on.

  3. Did you take the side off your case? If you see a temp drop then your case is not providing adequate airflow. A miner jammed in a small room under a desk is not a happy miner

  4. I’m running the same card and have been trying different thermal pads to get lower temps as well. First off, which 2mm or 3mm pads are you using? There are some posts that use Gelid Extreme 3mm pads which work in some cases because they are more compressible than the ThermalRight brand. Also Gelid Ultimate is less compressible than the Extremes, but it does have a higher thermal conductivity. I have all three in hand and it’s pretty obvious of the differences by squeezing with two fingers. If you’re using the Thermalright brand, then 2mm maybe even 2.5mm is what you want to use.

    The backplate pads are meant to draw some heat through the PCB to the backplate, which is “graphene” plastic… it’s a small help, but adding some heatsinks to the backplate might be better. You’ll maybe get 2C lower temps or negligible returns. I’ve used either 3mm Gelid Extremes or Thermal Grizzly for the backplate, but with no noticeable difference. If it was a metal backplate it probably would have been a lot more effective.

    Currently using 2mm ThermalRights with some added thermal paste to fill in some air gaps on the GPU die side. It’s at 1260 @ 0.743v, +1525 mem, 60C/90C Core/Mem while mining 24/7, between 82-100% fan (Nicehash OC tune GPU core targeting hysteresis isn’t the best) in an ITX case.

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