Anyone else experiencing crashes when doing simple tasks in Vegas? I am simply using 1 video layer with a background and no plug-ins yet and I'm getting frequent crashes and it looks like the culprit is NVIDIA's OpenCL driver nvopencl.dll.
Does GPU-Z show your GPU bus interface speed at PCI3.0x16?
Does Luxmark v2 render normally with CPU+GPU enabled?
Is this with the NV5000 you upgraded to based on your other threads? The 670 is right inline with an HD6970, but AMD has better support for OpenCL than NV. You might consider swapping the card out for a R9 270x, 280x, HD7970 (Ebay), 290x,or 390x. In order of performance.