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CUDA 5.0 Install Process

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Hi Everyone,
I got hold of the 5,1 3.3 and have installed an EVGA GTX680 and 48GB of RAM (of which 32GB is working - one of the sticks appears to be deadski...). Have installed NVIDIA Web Driver 313.01.02f01.

Running the Amira 5.5 Beta, Amira didn't initially detect the 680 as a CUDA device, so I went through the Install Process for the CUDA 5.0 drivers and Toolkit. http://docs.nvidia.com/cuda/cuda-get...-for-mac-os-x/

When I run deviceQuery, my output differs to that in the installation guide in one area - at the end I have:

deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 5.0, CUDA Runtime Version = 5.0, NumDevs = 1, Device0 = GeForce GTX 680

I don't get the next line, which in the user guide is:
[deviceQuery] testresults...
PASSED


Similarly, in bandwidthTest I do not get the last line:

[bandwidthTest] testresults...
PASSED


The particles sample works well despite this - ~430fps.

Amira, however, brings up an 'unspecified launch error' whenever I try to run a CUDA-accelerated filter using the GTX (which is now listed in the CUDA device drop-down).

Another thing I noticed is that the driver versions in the CUDA preferences (313.01.02f01) and CUDA-Z (310.40.00.05f01) do not seem to match?

Any ideas?
Should I be using OS X Default instead of the nvidia web driver?
Is the presence of the dodgy DIMM having an effect?

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