I bought my Ultra Lifetime Series 350w from Tiger Direct back in October 2009, it ran efficient and constant for a while and I'm still running it right now as I write this review, it's cheap as the price indicates and it'll last you more or less than 2 years before it starts messing around and doing power surges. I recommend investing in a power supply unit that is ''80plus'' certified with a good wattage, if you look around on Amazon you'll find good deals this time around!