i want to buy Radeon HD 4670 512MB graphics card but im not sure if it will work with the gateway i got i tried putting Radeon x800 gto in it but it wouldnt work(i cant remember the reason) heres the gateway specs http://support.gateway.com/s/PC/R/1009484/1009484sp3.shtml on a side note the 4670 was the only decent card i could find that would run on 300watt power supply and at a decent price