Can not find all of OpenCL devices in the 8 GPU system.

[Dariusz Makowski (Dadal)]

I just can tell you now it is really nice with 8 Geforce Graphic Cards. And V-Ray RT on GPU is really great RT renderer. I checked with this system. :_)

Show us some vid! tests! did u try mixed mode cpu+gpu ? :d

[ghiom3d]

Hello,

I've the same issue.
My workstation is 12GO RAM.
I can make 4 cards working , but not more.
i need to make 7 cards working .

Windows reconize all cards, and drivers are installed succesfully.
But OpenCL devices manager show me only 1 cuda device. ( like ARION )

[vlado]

Could it be a motherboard issue? (For example, we had some cases where things work fine with 7 GPUs, but slow down drastically when you add the 8th).

Best regards,
Vlado

[ghiom3d]

Strange .
If i plug 4 580 i can choose the 4 cards.
If i plug a 5th card, openCL device select utility give me only 3 card .

wich driver is best to use ?
i'm using 266.58

[sersia]

Could it be a motherboard issue? (For example, we had some cases where things work fine with 7 GPUs, but slow down drastically when you add the 8th).

Best regards,
Vlado

that is Right. It was almost half speed compare with 7 GPU.

[sersia]

Strange .
If i plug 4 580 i can choose the 4 cards.
If i plug a 5th card, openCL device select utility give me only 3 card .

wich driver is best to use ?
i'm using 266.58

The driver has that problem please dont use the lastest version.

[sersia]

The lastest dirver for geforce has a problem with openCL. Please use low version.

[ghiom3d]

you mean that i need to choose an older Driver ?
wich one ?

[sersia]

you mean that i need to choose an older Driver ?
wich one ?

That is right. It will be working with version 260.xxx.

[ghiom3d]

thanks you Sersia, i have some animation rendering right now. So i will try later with 260 driver

[sersia]

thanks you Sersia, i have some animation rendering right now. So i will try later with 260 driver

It is my pleasure. But I am not sure with GTX 580 but it is working with grx 480 very well. So sorry about that. When you get all GTX 580s with old driver please let me know.

[ghiom3d]

Nvidia Driver 263.09 do the job !!

Thanks you all for your support and you kindness, i have now 6 GTX580 for my workstation and 3 for my renderfarm !!!

[sersia]

Nvidia Driver 263.09 do the job !!

Thanks you all for your support and you kindness, i have now 6 GTX580 for my workstation and 3 for my renderfarm !!!

What a great news!! Good for you. Have a nice day~ :_)