Ok, time for some first conclusions.
upload speeds:
ATI: good (win7); acceptable (XP)
NVidia: good
Intel: acceptable
texture download speeds:
ATI: good (win7); acceptable (XP)
NVidia: good
Intel: acceptable
surface download speeds:
ATI: catastrophic
NVidia: fantastic (newer hardware/drivers); catastrophic (XP with older hardware/drivers)
Intel: catastrophic
reliability of NV12 -> RGB conversion
ATI: good (pretty much always the same)
NVidia: bad (influenced by various video options, sometimes weird results)
Intel: good (pretty much always the same)
lossless reversibility of NV12 -> RGB conversion
ATI: good
NVidia: bad (no way to stop driver from doing chroma upsampling, sometimes weird results for luma)
Intel: very bad (even luma is never reversible)
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Seems to me that ATI users might benefit from going win7. For NVidia users XP seems to do just fine (in these tests, at least), as long as you don't have old hardware + old drivers. Intel is really bad, even in win7.
P.S: Just to clarify: Most of these test results don't affect the current madVR version.
Last edited by madshi; 13th March 2011 at 09:11.
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