Gigabyte 3080 Thermal Pads are Garbage

TheSlySyl

[H]ard|Gawd
Joined
May 30, 2018
Messages
1,151
Problem for alot of folks is the 30 series cards are already almost comically long, the powerlink puts it off the end of the board instead of behind it.
Even in the example above you couldnt fit a powerlink in that sliver of space, but the 180 degree connectors fit.
Oh yeah, that makes sense. I always go for super, super deep cases.
 

noko

Supreme [H]ardness
Joined
Apr 14, 2010
Messages
6,091
Bought the nkomax 2mm Thermalright Thermal Pad from Amazon:
Removed the old from backside of the EVGA 3090 XC3 Ultra and installed the new Thermal pads:
Remove.jpg NewPadsInstalled.jpg
My 3090 vram Junction temperature is worst by about 2c. I kept the temperature at or below 100c using MSI Afterburned by locking the GPU frequency and memory speeds. Hashrate prior was around 90mh/s due to this and now to get 100c or less it is around 85mh/s. The original thermal pads made perfect contact and was aligned well with the memory modules etc. The new Thermal pads also makes good, not excessive contact with the backplate. Did not expect a worsening of performance here. Note the backplate has copper heat spreaders on it above. I also bought some heatsinks but due to how close the video card is to the air cooler, I could not install those.

Build.jpg
Looks like I will be getting another Artic Freezer II 280, have one for another machine with a 3900x and it works really good. The above air cooler, NH-D15S barely cools sufficiently the 5800x when mining Monero, maintains less than 90c and that is about it. Plus how close it is to the backplate to the video card is probably not helping those backside 3090 memory modules. Once a better CPU cooler (water cooled), which I have sufficient space on the front side of the case, I should be able to install the heat sinks and get better airflow across the backplate.
 

DPI

[H]F Junkie
Joined
Apr 20, 2013
Messages
11,450
^ That pad mod to the 3090 is a little perplexing, no offense. Doing only the back VRAM modules on a 3090, I'm not surprised TJ temp actually went up.

The backplate is not a heatsink, and most of the benefit from these 2mm pad swaps comes from doing the front VRAM modules since EVGA stock pads don't transfer heat as well as the thermalright pads.

I haven't needed to do a 3090 yet, but if that GPU were mine I would've swapped only front 2mm pads and tested, and then maybe done back modules with low expectations, and then only if I also had actual airflow across the backplate for it to even matter.

3090 is the wrong card for that particular case and CPU cooler setup while also trying to do memory OC intensive mining, and new pads can't perform miracles.
 
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schizo

[H]ard|Gawd
Joined
Nov 6, 2004
Messages
1,660
If you have a metal backplate (every 3080 but the MSI) it is, of course, a heatsink, if it makes contact with your card. Question is how much that matters.
 

Niner21

Limp Gawd
Joined
Aug 26, 2018
Messages
300
Have an Aorus 3090 Master here, and after hearing about these issues with ram temps just recently myself I started paying more attention to my cards temps. After a decently long gaming session my memory temps were in the high 70's to around 80C. Just posting this in case anyone had the same card for comparison purposes.
 

noko

Supreme [H]ardness
Joined
Apr 14, 2010
Messages
6,091
^ That pad mod to the 3090 is a little perplexing, no offense. Doing only the back VRAM modules on a 3090, I'm not surprised TJ temp actually went up.

The backplate is not a heatsink, and most of the benefit from these 2mm pad swaps comes from doing the front VRAM modules since EVGA stock pads don't transfer heat as well as the thermalright pads.

I haven't needed to do a 3090 yet, but if that GPU were mine I would've swapped only front 2mm pads and tested, and then maybe done back modules with low expectations, and then only if I also had actual airflow across the backplate for it to even matter.

3090 is the wrong card for that particular case and CPU cooler setup while also trying to do memory OC intensive mining, and new pads can't perform miracles.
Well the front side of the card has the cooler so my view is the hot vram is on the backside of the card. Anyways the EVGA pads were better than the ones I installed. It is more likely the original was 1.5mm pads while I put thicker ones, 2mm on, which is my thought or the rating of the pads is incorrect. Once I get the CPU water cooler, I will install the heatsinks on the backside for the vram and that will tell clearly if I need to do the front side of the card.
 
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