there is a strange problem with my two Tesla c1060 cards. When they run on windows xp, the geometric frequency, the shader frequency and the foreign frequency all step down to about 60% of original frequency. Detailed data as follows:
now geometric frequency: 400MHz
original geometric frequency: 610MHz
now shader frequency: 799MHz
original shader frequency: 1296MHz
now video memory foreign frequency: 297MHz
original video memory foreign frequency: 800MHz
So the “bandwidth test” in quick mode illustrates that the device to device bandthwidth is just 73311MB/s, there is a big gap between the original bandthwidth of c1060(about 102GB/s) and 73311MB/s.
I have tried the latest driver(190.00 for tesla c1060 and 191.07 for GT200)
Thanks for your help!