ati 4670 might be the best card with that power supply the 12v rail is not
strong enough should be 2 or more 12v rails with at least around 30v total
or you could det a new power supply and better vid card i just got a 4830
it's a nice card http://www.newegg.com/Product/Product.aspx?Item=N82E168...
($54.99 after $20.00 Mail-In
4670 good for lower resolution 1280 1024 price is cheap after rebate
plugs into motherboard no external power connection needed