2020/11/21 07:47:36
frauss
EVGA 3080 xc3 ultra is very little ultra.

This card has a big power problem!

It basically takes too much current from the pcie and too little from the 2 PSU connectors.

In practice it goes into Power limit before 320 w when it should reach 340 \ 366 instead.

It is a big problem for the boosts which are limited, it is also a problem for the safety of some motherboards as the power spikes on the pcie could put stress on the board and other components on it.

EVGA worked very badly, I hope it can be resolved soon with a BIOS upgrade otherwise on January 31st, fortunately limit time given by Amazon for purchases in this period , I will go back it immediately.

For now I set limit tdp to 300W for safety to avoid doing damage.

I was from a very good Turing EVGA, but with ampere they made quite a mess.

Attached Image(s)

2020/11/21 08:05:11
dragomirc
Be sure that Windows is not limiting power.
Check Ultimate Performance under Power Settings
 

2020/11/21 08:09:52
frauss
as you can see the pcie connector It already delivers 67 w And this is already the maximum it can deliver. I'm not the only one with this problem, but it's also true that not all cards have it the same way.
2020/11/21 08:15:32
dragomirc
I cannot see your image (need more then 100 posts)
PCIe standard draw is 75W max.
So your power draw is bellow max.
2020/11/21 08:17:10
frauss
dragomirc
I cannot see your image (need more then 100 posts)
PCIe standard draw is 75W max.
So your power draw is bellow max.


The PCI standard is 75 , but 67 from 12vand 8 from 3.3v

This the image

https://i.postimg.cc/prjX...0201121-123006-442.jpg

https:// i.postimg.cc/prjX...0201121-123006-442.jpg
2020/11/21 08:40:38
nycx360
I have an xc3 ultra. There is def nothing ultra about it. Its a black with backplate and 30 mhz. Why there isn't a backplate on a 700 dollar card is a joke to begin with. Last ultra at least we got a beefed up cooler. It's probably the most unjustified 80 dollar premium over the base I have seen evga do to date. Same goes for the FTW3 ultra pcb design at 109 and 300. I have the 80 FTW3 ultra as well, and I am getting the KPE 90 as well. I have bought products from evga every graphic generation, but I will call it as I see it. The FTW is not what it use to be with the 20 and 30 series. On the 3090 FTW3 which I owned shortly, the 300 premium over the FE for that kind of of pcb design is extremely disappointing to say the least. 
2020/11/21 08:41:08
yaggaz
dragomirc
Be sure that Windows is not limiting power.
Check Ultimate Performance under Power Settings
 





What version of Windows lets you select an Ultimate Performance choice?  Win 10 Home only offers me balanced, saver and high
2020/11/21 08:45:11
frauss
It must be activated with a particular procedure, you can find plenty of guides on the internet. But it has nothing to do with the problem If you turn up the tdp, and fortunately it does not happen because the limiter works, you risk breaking the motherboard.
2020/11/21 08:48:39
dragomirc
yaggaz
 
What version of Windows lets you select an Ultimate Performance choice?  Win 10 Home only offers me balanced, saver and high

This is the command you will have to run to show the ultimate power plan if it's not showing. Ran in the windows 10 search bar.

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61
2020/11/21 08:55:00
dragomirc
frauss
It must be activated with a particular procedure, you can find plenty of guides on the internet. But it has nothing to do with the problem If you turn up the tdp, and fortunately it does not happen because the limiter works, you risk breaking the motherboard.

2 x 150W (8 pins from PSU) = 300W
even 67W from PCIe brings total 367W
 
I have no idea about your rig spec so can't see your problem. Images are not loading btw.

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