Since I don't know which information will be important to answering my question, I will provide more than is probably needed. My main machine is built on an ABIT IC7G motherboard running Windows XP with SP3 installed. It has the latest BIOS ABIT issued for the IC7G. The CPU is a Northwood 2.4C overclocked to 3.2GHz. To get there, the FSB has been upped to 267 MHz instead of the spec 200 Mhz. The memory is 1 GB of OCZ PC3200 Platinum Rev. 2 ram running at a divider of 5:4 so the memory clock for it is 213.8 MHz with timings of 2,2,2,5! The system is rock stable and will run Prime95 indefinitely. The CPU is air cooled with a humongous Thermaltake CPU cooler. The Northbridge chip is also actively cooled with an equally humongous Thermatake cooler. Now for the question. The machine has two Seagate hard drives installed; an ST3500630A (IDE) as the C drive and an ST3300831AS (SATA) drive as the archive drive. The SATA drive is connected to the SATA 1 connector on the motherboard which is controlled by the Intel ICH5R Southbridge SATA controller. HDTach benchmarks the IDE drive as having an average read of 66.8 MBs with a maximum burst speed of 90.5 MBs. Inexplicably (to my thinking) it benchmarks the SATA drive as having an average read of only 51.2 MBs -- but with a maximum burst speed of 133.5 MBs. Can any one see an explanation for what should be a much faster SATA drive benchmarking as slower than the IDE drive? The machine is a super performer -- for an older Pentium 4 machine -- and having the archive drive be slower than it should be is not a critical problem. But I am mystified by what I am measuring. Help or suggestions would be much appreciated.