I have had an hd4870 512mb powered by a Coolermaster igreen 600w psu running without issue for 3years now, i,m currently looking into overclocking and noticed that the psu has 3 12v rails 16A continuous and 19.5A peak will i have problems under high loads. I can play Call of duty 4 max settings at 1620x1050 on a 19" screen no problems.
