Forum > GPU crunching
x38g reports
_heinz:
Hi Jason,
The Querying for a CUDA Device is so different in the OPTIMUS Technology,
see http://developer.download.nvidia.com/compute/cuda/3_2_prod/toolkit/docs/CUDA_Developer_Guide_for_Optimus_Platforms.pdf
page 3
have a look !
heinz
_heinz:
hi Jason,
I installed latest nvidia beta driver on my laptop, 275.50-notebook-win7-winvista-64bit-international-beta
BOINC 6.12.26 shows:
20.06.2011 22:23:06 | | NVIDIA GPU 0: GeForce GT 540M (driver version unknown, CUDA version 4000, compute capability 2.1, 962MB, 172 GFLOPS peak)
275.33-notebook-win7-winvista-64bit-international-whql has the same issue.
in general, there must be something wrong in the driver detection of BOINC.
Although, I can run primegrid.
heinz
Jason G:
--- Quote from: _heinz on 20 Jun 2011, 04:40:19 pm ---... there must be something wrong in the driver detection of BOINC.
--- End quote ---
Good possibility. At some stage (when I'm bored) I'll look at how they detect that, to see if it uses driver APIs etc properly.
Claggy:
--- Quote from: Jason G on 20 Jun 2011, 07:15:19 pm ---
--- Quote from: _heinz on 20 Jun 2011, 04:40:19 pm ---... there must be something wrong in the driver detection of BOINC.
--- End quote ---
Good possibility. At some stage (when I'm bored) I'll look at how they detect that, to see if it uses driver APIs etc properly.
--- End quote ---
I wonder if the driver is now reporting the Real amount of RAM the Ion has, and now isn't reporting the extra system RAM the BIOS settings add,
Claggy
Jason G:
--- Quote from: Claggy on 20 Jun 2011, 07:20:08 pm ---I wonder if the driver is now reporting the Real amount of RAM the Ion has, and now isn't reporting the extra system RAM the BIOS settings add,
--- End quote ---
That would seem to break the WDDM driver model, which basically says you get what you're given. I would have thought issues on one ION should appear on another. I haven't looked if there is a BIOS setting for mine as it has 512MiB dedicated & Windows 7, so system shared amount is determined by Turbocache functionality. I'll probably do that.
As I recall, You're good at working out complicated stuff like NewCredit :D . You could, if you're bored at some stage, go through the document at http://msdn.microsoft.com/en-us/windows/hardware/gg487348.aspx , to see if there's anything related , or especially anything I missed that I might need to know when working out the difference to XP Driver Model ( regarding the performance jump at various drivers & XP-WDDM performance difference with older simpler application code, etc )
[Edit:] checked my ION Netbook, no video related settings there at all, oh well
Jason
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