Because of one piece of necessary software that will only run on 32 bit Win 7 I am needing to dual boot between Win 7 32 bit and Win 7 64 bit. I have installed Win 7 32 bit on Drive 1 which is in SATA port 3 and I have installed Win 7 64 bit on Drive 2 which is in SATA port 4. I can run the 64 bit if I disconnect the 32 bit from the port but if I connect both of them only the 32 bit will boot, not the 64 bit. I was expecting Windows to give me the option. I have set the bios to boot on the HDD first. Anything else I need to do?