Can i install this into an oem Compaq computer. The SA4000T with the 915P chipset with PCI-Express. The mobo is made by asustek, model piranha serial number X312345678. THe bios is made by AMI. I talked with COMPAQ Instant support, and they said they were working on a bios update so the mobo would support the 6xx series. But since the 5xx series now has 64-bit, can i install that so i would have a 64-bit supported processor?