I will be in the process of constructing a new pc with windows vista and i need to know what the maximum amount of memory the different types of vista will recognize. Specs of new system: Mobo-ASUS P6T Deluxe LGA 1366 Intel X58 CPU-Intel Core i7 920 2.66Ghz psu-XION AXP-1000R14HE 1000W GPU-BFG GTX280 1GB RAM-G.SKILL 6GB (3 x 2GB) DDR3 SDRAM DDR3 1333 F3-10666CL9T-6GBNQ O/S-VISTA(not sure which)x64orx86?basic/premium/ultimate Cooling-Thermalright 120 ultra Extreme/Arctic Cooling MX-2 thermal paste HDD- 1-1Tb Seagate Barracuda 7200.11 ST31000340AS 1-500Gb Western Digital WDC WD5000AAKS 1-320Gb Seagate Barracuda ST3320620AS Now i am a huge pc gamer and i would like to harness the full potential of my 6Gb of memory. Which O/S's should i run to get the complete 6gigs? if i run the 64bit version will i still be able to play all the games i have?What are pros and cons of 64bit? I would like to stick with x86 but if i have to go x64 i will.