yup, sakto ang kasagaran answers diri. i'd also like to share my view ani nga topic.
if ang imo ra jud purpose is for gaming alone, then go for 64 bit, pero if it's a little bit of both worlds, gaming & application usage, then stick lang sa sa 32 bit.
ang 32 bit nga architecture is taas2x na nga explanation pero the essense is it only uses up to 3.75gb of ram and maximum hdd nga mo gana, meaning mo boot ang os nimo is only up to 2.19tb. that's how limited 32 bit architecture is.
the good thing sa 64 bit architecture is of course mas taas jud ang memory bandwidth niya. currently, ang pinakataas nga ram capacity is 96gb. yup sakto na imo nakitan, 96gb ram.
right now, there's only one mobo nga makaya inana kadaghan ug slots sa ram & that's EVGA SR2. kamo na bahala google ana niya.
generally speaking lang, the more ram, the faster the performance is for your games, maski crysis pana, niya imo gi set sa highest shading, anti-aliasing ug unsa pa na nga mga churva, paspas jud siya(side note lang sad, it also depends on the type of gpu imo gigamit).
but when it comes to software or applications, right now, wala pa or nihit pa jud kaayo ang ni utilize sa 64 bit architecture.
going back sa games, it also depends on what your mobo, gpu(video card), ram is. even your monitor will matter if pila ang maximum & native resolution ani niya.
daghan jud ka i-consider at least as far as gaming performance is concerned. personally, i would & am using win7 ultimate 32 bit coz i utilize both games & software use.
but then again, that depends unsa imo gusto buhaton sa imo computer.