Originally Posted by Computer_Potato
The EM64 T LGA 775 CPUs (6XX) will require a BIOS update if you are currently using a 32bit chip (5XX) ? I don't know if the 64bit version of windows will work on the 9860 because there is no Promise Driver. Unless 64bit windows can use the 32bit drivers.
This is NOT entirely true....
My 32Bit 3.8 Ghz System was upgraded to the 64Bit 3.6Ghz Processor. I did not have to do a BIOS Upgrade. Windows x64 WILL run on this machine. I had it installed for about two hours. Have Promise Beta Drivers, ATI Betas, Realtek Audio Betas. The OS loaded and was running. I was getting Blue Screens and lock ups dur to the Promise controller, and decided to go back to Win XP 32 Bit untill the drivers are stable and the other issues were worked out.
BUT IT WILL WORK. It will just take a little time to get the kinks worked out.