1080ti SLI, second card missing CUDA tooltip in GPU Z

[Zfast4y0u]

hello, after i updated drivers for my gpus today, i noticed my second GPU is missing CUDA tooltip in GPU Z that it had enabled before update. i try rolling back driver, disable-enable sli, restarting pc, nothing helps. how to fix this issue anyone knows??

 

[eidairaman1]

Reinstall gpu-z

 

[sneekypeet]

Mine does the same on 2.6.0. Updating now to see if anything changes.

shows the same with a fresh install too.

 

[Vya Domus]

In the Nvidia control panel there should be a an option to select which CUDA enabled device to use , I have just one card so I don't what how it's suppose to be for you but I suspect only one of them is selected.

I am curios though , why is this bothering you ?

 

[Zfast4y0u]

CUDA gpu's is enabled for ALL by default, and its on ALL, just checked. i did try older version of GPU Z, still same problem, reinstalled the one i had, nothing, just downloaded latest version of rog gpu z and issue is still there. kinda glad im not only one with this issue, but on internet i couldnt literally find no trace of someone posting this :S.

@Vya Domus

i simply want device to work how its intended to work, not some crippled half working thing i pay how much i did.

 

[Vya Domus]

I am pretty sure it works just fine if Nvidia says both are enabled then they probably are.

GPU-Z is a third party app and sometimes it fails to report these things correctly.

 

[Zfast4y0u]

i just noticed when i disable sli, set first card to be dedicated to physix, then second gpu has cuda tooltip enabled again, but if i enable sli and set system to decide what card takes over physix, then second card loses cuda again.

 

[StefanM]

Open Advanced tab/CUDA and switch GPUs.

Double-check with GPUCapsViewer

Also check out
https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#sli-interoperability

 

[Zfast4y0u]

alright, i did try that with gpu z and with second card when i choose CUDA in advanced tab, it tells me, device not found.

when i open gpu caps viewer it detects 2 cuda devices and when switching between cards, i see nothing changes.

on website you shared me, what should i be looking for? its wall of text xD

 

[Vya Domus]

on website you shared me, what should i be looking for? its wall of text xD

In a system with multiple GPUs, all CUDA-enabled GPUs are accessible via the CUDA driver and runtime as separate devices

SLI and CUDA are standalone features. Whether or not you enable SLI , CUDA functions in the same way.

 

[eidairaman1]

Contact nvidia for troubles.

 

[Vayra86]

I don't see the problem here. So you don't get a CUDA checked box on one of two GPUs and if you swap them around / reassign them, the problem doesn't move with the GPU to slot one?

Obviously this is just a weird readout of GPU-Z, ignore and move on.

 

[Zfast4y0u]

i didnt swap em. they are in costume lube and i dont feel tearing whole thing apart just yet :\

edit, i just tested driver 6 months old and cuda tooltip is back on both GPUs, so this is some kind of bug i guess with gpu z with new nvidia drivers.

 

[michaellinder]

I've been having the same issue. Here's how Nvidia Customer Support replied via email,

I found other users reporting this issue as well with GPU-Z and CUDA option in SLI setup, so likely just how GPU-Z treat SLI configurations, and not a hardware or driver issue. It's not uncommon for 3rd party apps like GPU-Z to run into such issues as we are constantly making changes to our drivers. Other users posting this issue confirm CUDA is working so this looks to be a cosmetic bug.

Best regards,
—Ray
June 20, 2018

Hope this helps.

 

[DJSuprimeW]

here the same problem! see my post: https://www.techpowerup.com/forums/threads/gpu-z-2-10-0-cuda-problem.246193/

And a fix for the short or long time is this one:

1: instal Nvidia Geforce 391.35
2: GPU-Z 2.8.0 it was i think...* a earler version before 2.9.0*
3: it should work now.

 

[W1zzard]

Reinstall gpu-z

Reinstalling GPU-Z doesn't do anything. Most people don't even run the GPU-Z installer, it works just by running the executable

I tried to reproduce this using GTX 1070 Ti.

• Installed two cards, drivers installed automatically.
• After reboot started GPU-Z: 2nd card shows CUDA disabled.
• Went to NVIDIA control panel, disabled SLI, started GPU-Z and CUDA is now listed for both cards
• Back to NVIDIA control panel, enabled SLI, CUDA is still listed for both cards

Can you check if this is the same behavior you are seeing?

 

[W1zzard]

Quick update, I'm working with NVIDIA on this

 

[DJSuprimeW]

i was working with nvidia on this too.. but i have not yet an update or reply back

 

[DJSuprimeW]

an update: Nvidia is looking at this issue with GPU-Z Together!

 

[Caring1]

an update: Nvidia is looking at this issue with GPU-Z Together!

W1zz already said that in the post prior to yours

 

[DJSuprimeW]

W1zz already said that in the post prior to yours

Nope, he says only that he is working with nvidia on this issue, not that nvidia is working with gpu-z together to fix this issue. or is he the guy that works for gpu-z?.. then you are right! and i trying to give an update to you all, nothing more!

 

[W1zzard]

I heard back from NVIDIA that they managed to reproduce the issue, and it'll be fixed in the upcoming 400.xx drivers

 

[DJSuprimeW]

I heard back from NVIDIA that they managed to reproduce the issue, and it'll be fixed in the upcoming 400.xx drivers

thank you bruh! i had the same answer from nvidia

 

[Zfast4y0u]

sweet.

should i report bug in cpuid hwmonitor here too? xD its missing my second gpu ^^ not reading or detecting it at all. its also long pending issue, i just didnt care about it since i use HWinfo mainly that is working flawlessly.

 

[DJSuprimeW]

someone any news about the issue?.. and the state of nvidia with this issue ?...