Hello. I have a Dell OptiPlex GX280. I recently replaced the PSU in the computer. The new PSU is a Thermaltake TR2 430W. The new PSU allowed me to get the computer up and running, but with some problems. The computer boot-time takes longer, and the performance seems sluggish. More importantly, the second hard drive is unrecognizable. When I click on the drive icon, the computer asks me to format the drive. The drive worked fine prior to the PSU replacement, and I'd rather not lose all my data on the second drive. The second drive is Seagate brand; and I'm operating on Windows XP. I've double and triple checked the cords and lines, rebooted several times, and I still have the same issues. Any assistance would be greatly appreciated. Thank you.