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Please may I have access to the crypto forum again? @Maccy-Admin @Feek Cheers!

I've just got shipment confirmation on the Aorus 3090 Xtreme. I was #2 in the queue last week.

Here's my queue position update for the Aorus Xtreme 3090.

Very true. I'm having trouble accepting that the manufacturers didn't spot this as being a problem during the design stage. Surely they must test the cards at full utilization and monitor the effectiveness of their cooling solutions?

Haha, yes it was a pragmatic / hacky workaround to a problem. Being a software developer I'm used to doing those! I'm sure there are more elegant solutions requiring more time and effort, but so long as it works then I'm happy.

Sure, here you go: I pasted some Thermal Grizzly over the backside of the GPU and memory chips, then secured the heatsink with zip ties and pointed the fan at it. There wasn't enough clearance at the top to keep the fan mounted to the heatsink.

I ran into the same problem when mining Eth. In the end I placed a heatsink on the rear side of the card and I no longer get thermally throttled. See https://www.overclockers.co.uk/forums/threads/3090-secret-memory-perfcap.18916718

I pasted some Thermal Grizzly on the bottom of the Spire heatsink and that's done the job. No more thermal throttling. It's now only throttling due to the power limit and running a sustained memory overclock of +1300 and 2000 MHz GPU core clock.

I might take off the backplate later and see if there's any thermal pads on the memory chips. But even if there is, there's no active cooling of the back side of the card as it's not joined in any way to the (massive) front cooler so it's really relying on dissipation from the backplate. Seems a...

Would you mind sharing how I can test the VRAM for ECC errors?

Have you checked HWiNFO whilst running a GPU intensive app? You know you've run into this issue if you see 'Performance Limit - Thermal = Yes' regularly and your GPU clock speed keeps dropping down. This is what mine looks like when it's throttled due to VRAM temperature exceeding the limit.

I added a spare AMD Spire cooler heatsink that I had lying around to the top of the card and it has improved things massively. It no longer throttles due to thermals even if I overclock the memory to 700MHz. At the moment the heatsink is just sitting on top, but I might try adding some thermal...

Yeah I heard that EVGA have some sort of patent on monitoring the memory chips. Not sure how much truth there is to that, but seems strange that other manufacturers haven't implemented monitoring of the memory chips.

Howdy folks. I've got a Gigabyte Aorus Master 3090 and I've noticed that it will throttle due to 'Thermal PerfCap' reported in HWiNFO, but the GPU itself is only 55C. After digging a little further, it seems as though the memory chips on the rear side of the card might not be being cooled...

I've got a 5950x with Gigabyte Aorus Master 3090 running on a Gigabyte Aorus x570 Master mobo, with a custom watercooling loop comprising an EK D5 pump / res combo and a single 360 rad front mounted in a push/pull config. Only the 5950x is water cooled. The 3090 is cooled with the factory...

5950X running on a Gigabyte Aorus Master X570 with F31o BIOS / AGESA ComboV2 1.1.0.0 D. CPU (Multi Core): 25993 pts CPU (Single Core): 1526 pts HWINFO specs

My Gigabyte Aorus Master 3090 turned up (not from OC). It's a beast! The box weighs a ton.

Ahh, interesting. I didn't realise that there was a 390W Gigabyte BIOS out. I think that'll do me! I feel more reassured about my Aorus Master purchase now.

Thanks for taking the time to write the comprehensive reply! I'm not too fussed about benchmark scores, and wasting all of that power for a couple of % higher FPS here and there isn't really appealing. As you rightly mentioned, more power = more heat which might then start adversely affecting...

Are all 3090 cards with two 8-pin power connectors limited to 375W? 150W (8-pin) + 150W (8-pin) + 75W (PCIe). Is this likely to be a problem? Are there any gains to be had from going over 375W, or is it diminishing returns beyond that point? The reason I ask is that I have a Gigabyte Aorus...