I have a P4 2.4 GHz with 512 DDR (400MHz ) running on an Intel 845GBV mobo . I want to upgrade my pc to 64 bit and this is the final spec I came at : Asus A8V Deluxe mobo + AMD Athlon 64 3200+ 90nm winchester. is this a good idea ? can the mobo be later flashed with some new BIOS version to support 64 bit dual core ? pls advice .