Hi George

You might have some luck using a different driver. I have a similar issue with Sandforce drives and AMD 890 boards. First run of PCMark Vantage returns a proper HDD score. Each consecutive run results in a lower score until there is no score. The only fix I have found is a reinstall of the operating system. This happens using the native Win7 drivers. If I use AMD's drivers Vantage runs properly regardless how many times I run it.