Thanks for the reply..
The harddrive is 6Gb/sec. Addition to this, I have inserted 4-port PCI Sata-2 card in one of the PCI slot. BIOS nor win 7 OS is recogniing the PCI card.
Pls note I have connected HardDrive to Black Onboard Sata-2 port and installed Win7 OS via USB DVD drive,
IS 550Wats Power supply is sufficient for the above configuration?