What OS? If Win7 or 8 chances are good you can simply plug in the OLD drive and it will boot up (set the BIOS to the same drive type as you had in the old rig i.e. AHCI or IDE and have Win fully updated). Make a backup of all your data, put the old drives in, boot it up, if it can, the OS will load appropriate default drivers, then load the latest mobo drivers from the mobos web page, run a good registry cleaner (Wise has a free version) to get rid of erroneous, old entries, and then will prob have to re-activate Win