GPU voltage is higher at idle than it is under full load

shinryu333 · Oct 24, 2015

Hi, I just got my r9 390 today and popped it into my set up. Started to overclock it to see how far I can push my card. I noticed something odd while doing my tests. GPUz reports that while my GPU is at 100% load during my stress tests, my GPU voltage is at 1.18v. However, when it is idle, GPUz reports that the GPU is running at 1.27v. I find it really odd that it'd be running at a much higher voltage at idle than when it is at full load...It reports 1.18v across all the things I stress tested with (Unigine, furmark, tomb raider). Here is my current overclock settings: http://puu.sh/kWA2P/0d253fe323.jpg

All my temps have been under 71c. Any insight will be appreciated.

cdabc123 · Oct 24, 2015

i believe that card has a switch to go between 2 different bios try switching that and see if it helps.

shinryu333 · Oct 25, 2015

cdabc123 :

Interesting, I didn't know about that. How would I go about changing the bios profile (if there is another one)?

cdabc123 · Oct 25, 2015

there should be a switch on the card that switches between the stock and a modified one

shinryu333 · Oct 25, 2015

cdabc123 :

Just did a check and unfortunately there doesn't seem to be any sort of switch.
*Edit: It is a powercolor card.

cdabc123 · Oct 25, 2015

can you give me a link to your card everything i see shows a switch, also try googling "bios switch on powercolor r9 390" and looking at images.

shinryu333 · Oct 25, 2015

cdabc123 :

Ahh, okay you're right I found it. However, it says that the powercolor r9 390 has 2 identical profiles. Basically it's only there in-case it's needed for backup apparently. Would pressing the switch yield anything?

cdabc123 · Oct 25, 2015

if this is a new card the bios' will be identical, but it will hurt nothing to try

shinryu333 · Oct 25, 2015

cdabc123 :

Unfortunately switching bios didn't resolve the high gpu voltage at idle. Appreciate the help though.

cdabc123 · Oct 25, 2015

try going into cc and changing the overclocked voltage

shinryu333 · Oct 25, 2015

cdabc123 :

I was only able to access voltage controls through afterburner, which I set to +100 mV. CC only let me fiddle with power limit.

cdabc123 · Oct 25, 2015

ok, are there any other issues with the card when its running?

shinryu333 · Oct 25, 2015

cdabc123 :

Nope, everything seems to be in order so far.

cdabc123 · Oct 25, 2015

well then i would just ignore it. it might be meant to have a higher voltage at ideal, and the sensors might be broken.

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GPU voltage is higher at idle than it is under full load

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