Very Uneven SLI GPU usage, feels like i use 1 gpu only

Zabocska · Oct 18, 2014

So i've received my SLI GTX 770 few days ago and i was 100% about installing sli bridge, enabled the 3d performance on control panel but i still don't know what is wrong with the gpu's

http://i.imgur.com/vwbOo4l.jpg <-- picture of usage

ImDaBaron · Oct 18, 2014

The load isnt spread out evenly between the two GPUs. That's just how it is

JackNaylorPE · Oct 18, 2014

GPU won't get busy unless you run something .... load and run Furmark

kapitalistas · Oct 18, 2014

may help reinstall all video drivers and reboot after every uninstall and install.

Zabocska · Oct 20, 2014

i did the reinstall of the video drivers before, it did not work. heres a picture of the usage http://i.imgur.com/NHYj2lk.jpg

ImDaBaron · Oct 20, 2014

Looks right to me

Zabocska · Oct 20, 2014

yeah well if you see the second gpu's graph you can see the temperature constantly stays at 28 celsius and there must be a reason to that why i am getting 45 fps on crysis 3 when the benchmark estimates over 80 fps.. i tried it with turning of the sli, same fps. there must be a solution to get that other gpu working

Mousemonkey · Oct 20, 2014

Try with something other than Furmark, a game perhaps?

JackNaylorPE · Oct 21, 2014

Zabocska :

I'm confused as to why I see the Intel GFX in there (Furmark).....shouldn't be....perhaps that's the source of the problem.

Zabocska · Oct 21, 2014

um how do you disable the processor intel gfx, i dont have anything connected to the intel gfx hdmi port on mobo

JackNaylorPE · Oct 21, 2014

Go into BIOS and diasble it.

ImDaBaron · Oct 21, 2014

Good catch Jack

Zabocska · Oct 21, 2014

ill try, if it works, i would have never guessed that was the problem, will be thanking to you

JackNaylorPE · Oct 21, 2014

If I'm right, please tell my wife.... according to here, thatz never happened before.

Zabocska · Oct 21, 2014

umm, it still did not work, on furmark i only see the GPU one working, other is asleep

any other solutions to this?

bystander · Oct 21, 2014

Have you run any games yet? They must be played in fullscreen mode, or the 2nd GPU will not run.

Zabocska · Oct 21, 2014

yes i did, battlefield 4, arma 3, crysis 3.. still no sign of the other gpu working, could it be the PSU? because i only have a 750w corsair one, and it might not give much power? although i could connect all the pci-e cables to the cards from the psu

bystander · Oct 21, 2014

Are you running in fullscreen mode? Without fullscreen, SLI does not work.
Do you have Vsync on? If it is on, your FPS are limited, and GPU usage is effected.

Zabocska · Oct 21, 2014

i dont have vsync on because it creates lag on fps games and i am running them in fullscreen mode

JackNaylorPE · Oct 21, 2014

I'm seeing 110% of TDP on both cards in Furmark (windowed mode)

Zabocska · Oct 22, 2014

so what might be the problem then? my idea is the cards dont get enough power from the psu..

Very Uneven SLI GPU usage, feels like i use 1 gpu only

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