PCI SERR with AMD but not NVIDIA
#16
Then I'm afraid you do not know your history. I have a stack of burned motherboards and power supplies that were once running HD 6990s that says your doubts are seriously misplaced.

There's a reason why EVGA invented the "powerboost" PCIe power adapter mod, which prompted motherboard manufacturers to start adding supplemental power connectors to the PCI-e bus on high-end boards, and also why powered risers suddenly became very popular among bitcoin miners.

This was one of the first threads I read on this issue after experiencing a few meltdowns:

http://forums.evga.com/24pin-ATX-power-p...49507.aspx

So yes, AMD cards absolutely DO draw more than 75W from the PCI-e slots. And this is why Tyan and Supermicro say not to use GPUs that draw > 300W on their boards, because they do not have such supplemental power going to the PCI-e slots. 75+75+150 = 300W. If you use GPUs that draw > 300W, then you'll start burning up the board.

The exception for this is apparently the R9 295X2, which instead draws an absurd amount of power through the 8pin PCI-e power connectors:

http://www.computerbase.de/2014-04/amd-r...rk-test/2/

They measured 245-275W being pulled out of a 150W plug.

I'm honestly not sure which approach is worse, but the outcome is the same: we all need to start moving away from these cards!


Messages In This Thread
PCI SERR with AMD but not NVIDIA - by ecos - 06-26-2015, 08:09 PM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 06-26-2015, 10:24 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 06-27-2015, 04:39 PM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 06-27-2015, 11:51 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 06-28-2015, 09:33 AM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 06-28-2015, 01:12 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 06-28-2015, 01:47 PM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 06-28-2015, 07:57 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 07-04-2015, 07:35 PM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 07-04-2015, 10:56 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 07-06-2015, 11:48 AM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 07-06-2015, 12:25 PM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 07-06-2015, 01:14 PM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 07-06-2015, 02:39 PM
RE: PCI SERR with AMD but not NVIDIA - by KT819GM - 07-07-2015, 06:25 AM
RE: PCI SERR with AMD but not NVIDIA - by epixoip - 07-07-2015, 07:40 AM
RE: PCI SERR with AMD but not NVIDIA - by ecos - 07-25-2015, 05:33 PM