Hi I have a dell dimension 4700 since..i donno when (i know, its pretty old now). Recently I decided to upgrade some of its parts due to serious lags when gaming. ( I usually play sims 2 with all expansion packs ) Intel Pentium 4 CPU 3.2GHz Intel 915G Express 512MB x 2 RAM ( = 1.00GB RAM) ATI radeon X300SE 305W psu Above is my original spec, and I want to upgrade my graphics to nVidia GeForce 8600GT 512MB PCI-Express x16 if its possible on my cpu and my psu. And also, add two more of 512MB RAM,to make ram of 2GB in total. Is this alright? Should I add a higher psu? I was thinking of [Antec Earthwatts 430W ATX 12V v2.2 PSU w/ Active PFC / 2x +12V Circuits / Low-Noise 80mm Fan / 80PLUS Certified / 1x 20+4pin ATX v2 / 1x 4pin ATX12V / 1x 6pin PCI-E / 4x SATA / 6x Molex / 1x FDD Connectors] <- does this fit my dell? (Early years, my comp rebooted suddenly, and wouldnt boot itself after that, but sometimes boots completely fine. And just yesterday, did the same thing. When I can't turn on my dell, only the fan goes crazy and nothing would appear on the monitor, is this symptoms of power shortage? When I searched the net, other dimension 4700 users had this same problem also. Some said it was a psu problem, and some said its mobo) Should I just get a new pc, rather than upgrading my dimension 4700?? (as you can see it has some problems..but does not occur too often) I'm very on budget...so I prefer to have it upgraded rather than buying a new one..but if buying a new pc is more beneficial. I think I can handle it. Please help..I only have very little knowledge about computers.:dead: *btw, i replaced my hdd about a year ago, when my old one died. *the place where I'm planning to buy the parts are...well. no refund policy. so I have to really really really know what parts I'm going to replace T.T help me on this one also.