But as far as i know. XP as a 32bit OS can address 2.3 gigs of ram maximum.
Your suped up 64 bit OS would probably be able to address much much more.
I'm currently on a laptop with a 64bit vista OS and 2 gigs of ram... I CAN NOT ACTUALLY use this for gaming...
Admittedly my graphics processor in this is a bit shoddy. but i game a fair bit... Vista itself takes up alot of ram.
And most LARGE games... like MMORPGs (world of warcraft, lord of the rings online) require RAM more than graphics as the skins are quitre simple so the graphics card doesnt have to be amazing by any stretch, if your into mmo rpgs.
ofcourse if its like games that require heavy graphics like gears of war or something like that then focus more on graphics cards than ram
If you can upgrade your ram to 3 or 4 gigs without it costing too much it would optimize your gaming experience. but, for example, i play WoW... i tried to play it on my laptop once or twice. i got roughly 5 frames per second. which is shocking.
wheras it runs smoothly on my PC with more ram than addressable by my OS.
i'm not sure if that all made sense to you (my appologies if it doesnt... it's pretty late at night)
im not even sure if its all 100% correct. i'm no whiz :)
If you're going to be installing a 64 bit OS, I think an extra 2gb would be worth it since Windows and games can make use of it (more the merrier?.) I picked up 2gb of DDR2 800mhz ram for around £30 the other day, so it's that much extra to splash out.
Be warned though, the increase may not be very much click here It's therefore up to you to weigh up really. On one hand you can future proof quite cheaply and on the other it probably won't give a very noticable performance increase at the moment.