SiSoftware Sandra (the System ANalyser, Diagnostic and Reporting Assistant) is an information & diagnostic utility. It should provide most of the information (including undocumented) you need to know about your hardware, software and other devices whether hardware or software.
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Can s.o. double-check "GPGPU processing" (uses CUDA 2.2)? It crashes with my 8800GTX(G80). Old versions build around older CUDA versions ran fine