[RESOLVED] PS just sees 1 of 2 GPU's

[Patribus]

Hello,

I decided to add a second GPU to my PC (2x GTX 660) but only one is recognized by PS?
Does someone has an idea why this is (could be) so?

Cheers
Patrick

[Alexey Pasumansky]

Hello Patrick,

Have you checked if other applications see both graphicc cards? Maybe updating the drivers would help.

[Patribus]

Hello Alexey,

I did install the newest drivers from NVIDIA,
in the device manager (win 10) both cards are listed without any error indication,

and unfortunately i do not have any other software where I could check the presence of both cards (at least I would not know which software to use).

Presently both cards are connected via SLI, but I read here in the forum, that that does not even bring advantages. So I could remove the SLI connector, should it maybe be the reason for the problem?

Cheers

[Alexey Pasumansky]

Hello Patrick,

SLI bridge shouldn't be the issue and PhotoScan should see the cards even if they are connected by SLI, but for better processing performance it might be reasonable to remove the connection cable.

[Patribus]

Alexey, could you please propose me some opensource or demo software which i could install quickly and which allows me to check, if the cards appear there both or just one. Just to be sure, that the problem comes from something else than PS.

Thanks
Cheers

[Patribus]

OK, I discovered the problem.

THe thing is, I'm not sitting in front of my PC which runs PS. Instead I use the remote desktop service of Windows.  As it turns out, when using this, windows deactivates one of the two GPU (for which reason so ever).

I just checked some stuff directly at the PC with the two GPU and suddendly both were available, also in PS.

So, instead of using the windows internal remote desktop functionality, I'll use the Teamviewer Software, which does not cause any problems, as it should be.

Well, Alexey, maybe you should make a note of this behavior, in case it turns on again.

Cheers

[Alexey Pasumansky]

Hello Patrick,

Actually, it is a known issue of Windows Remote Desktop (http://www.agisoft.com/forum/index.php?topic=1670.0). But I was confused by the fact that one GPU has been still recognized.

[MeHoo]

I had this happen too.  Chrome remote desktop does not disable OpenCL; neither does teamviewer from what I hear.

And you don't need the SLI bridge.  I am running two 970GTXs and one quadro K4000 and the GTXs are double the speed.  OpenCL and CUDA are not the same. 

Hope this helps.

[Patribus]

Yes, Alexey,

so strangely I see one GPU from the two via Windows Remote Desktop controlling.

Well,
Cheers