I recently went out to find out how i could upgrade my PC. And was told that the only upgradeable hardware was my Video Card and Memory without having alot of compatibility issues to deal with. Current Specs: Processor: Intel Celeron D 3.2Ghz Mobo: Intel D915GAV PCIe Video Card: Radeon x1650pro 512Mb RAM: 3Gb Kingston DDR2 PSU: 450watt (i think...the sticker on the PSU says 473) OS: Windows XP Media Center I wanted a decent gaming rig, and by the looks of it, it should be decent, but still runs pretty sluggishly for even some older games, and just basic OS navigation, which is what is leading me to try and upgrade. So the things i am asking is: 1.) Is the rig currently un-upgradeable for the CPU etc. without having incompatible mobo and memory? 2.) Is there something that may be causing this current setup to run worse than it should be? Any advice on upgrading etc. would be appreciated. If you guys need any more info I will try and figure out how to get it EDIT: Ok i looked up the mobo and it turns out it only supports P4 and Celeron D (which sucks) so should that be my first step? will this cause many compatibility issues? Cost alot etc.?