I have an older 300w powersupply that I bought about three years ago, it was pretty much top of the line when I bought it.....but now I am looking at upgrading my pentium 3 based system to an Athlon xp 1600 on an ECS board...just wondering if I would encounter any problems with my ATX powersupply or not....I can open it up and look at the brand if I have to...thanks.