One of my computers with an NVIDIA GPU crunches work units using "V8 8.00 (cuda50)"
http://setiathome.berkeley.edu/show_host_detail.php?hostid=7992114

Another computer I have (also with an NVIDIA GPU) uses "V8 8.12 (opencl_nvidia_SoG)" or "V8 8.12 (opencl_nvidia_sah)"
http://setiathome.berkeley.edu/show_host_detail.php?hostid=7906450

Why does one computer always crunch with "cuda50" and the other "opencl_nvidia_xxx"? Is there a setting for this?

Nothing is wrong, I'm just curious.

Cheers
Mark

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I'm guessing your 650 Ti isn't OpenCL capable.

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Hi, GeForce GTX 650 Ti do have full Open CL Support (1.2 version).
On page 23...as all Kepler,Fermi core.
http://www.tomshardware.com/reviews/geforce-gtx-650-ti-benchmark-gk106,3318.html
http://www.nvidia.com/content/geforce-gtx/GF_GTX_650_Ti_User_Guide.pdf
https://en.wikipedia.org/wiki/GeForce_600_series
My little 610M on one of my Asus notebook (A55VD) support only 1.1 Open CL revision.
Fermi microarchitecture...
http://www.nvidia.com/content/pdf/fermi_white_papers/nvidia_fermi_compute_architecture_whitepaper.pdf

Marco.

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Different applications probably suit the different cards better, at least according to the fairly questionable measurement/comparison the server does. If you needed/wanted to, the way to switch builds would be using the anonymous platform mechanism, such as through Lunatics Installer or manual installation of applications.

Some application builds do have driver version restrictions applicable, so checking the readmes there could show something as well.

In the Cuda 5.0 case on the 650ti, for that type of GPU (Kepler class), the baseline code in that version operates relatively efficiently. Raistmer's OpenCL SoG build looks to scale pretty well on the Maxwell class Quadro there (I'd imagine using more video memory to spread out a bit, so even though the server makes some strange decisions sometimes, doesn't seem weird in this case.

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"Living by the wisdom of computer science doesn't sound so bad after all. And unlike most advice, it's backed up by proofs." -- Algorithms to live by: The computer science of human decisions.

If you look at his hosts, the one with the 650 Ti isn't reporting any OpenCL capability.

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If you look at his hosts, the one with the 650 Ti isn't reporting any OpenCL capability.

Had a quick look and didn't spot that. Could be a driver version / Boinc version thing involved then. Also some Microsoft Update acquired drivers seem stripped down, perhaps updating driver from nVidia's website would change matters ?

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"Living by the wisdom of computer science doesn't sound so bad after all. And unlike most advice, it's backed up by proofs." -- Algorithms to live by: The computer science of human decisions.

Thanks for the info guys. I will take a look at the NVIDIA drivers installed and go from there.

Cheers
Mark

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