I just built a new system from a new Intel "sandy bridge" CPU. New everything. It's up and running now with Win7 64-bit and the single primary HDD is mounted to 6 GB/s AHCI SATA (system partition and primary partition). I would like to transplant my system drive from my previous rig but was wondering if I should have concerns. The previous drive will be on a 3 GB/s plug, since that's the drive's speed, but it was running as the primary dirve under IDE SATA in a 32-bit Win7 OS. I just want to know if I should expect any problems or issues. I want all the old drive's data to remain intact so I can move it off the old drive, onto the new drive.