Soapy29:
Minecraft is supposed to be pixelated, but are you sure a new graphics card would work? And how would I install it. Could I add an extra monitor?
yea it looks crappy, but theres a thousand things that it has to do to make it run in 3d in real time, that onboard card, like all, is on the edge of functional (and I bet the box says "great for gaming" heh)
ok first your computer only has one pci express slot, forget SLI and frankly its like putting a v12 in a Volkswagen, your goal is to improve performance, not making the most uber game rig evra
second pretty much anything you stick in there is going to suck down some power, you will need a new power supply as the 250 watter in there now would be maxed out even with a lower end video card. you could try but it will eventually kill your power supply ... I tried it and it actually lasted about 5 months before death. Also dont get a cheap power supply, pay a little extra and get something decent with a lifetime warranty.
third 4 gigs is fine
your going to end up replacing nearly a third of your computer, but if you get decent stuff now, it will last you a while, and getting a decent video card, and power supply now, then in a year or two getting a better motherboard and power supply helps you "stay in the game" without breaking the bank all at once
what range of money are you looking to spend