After 6 months of using these and wondering why they were just ridiculously slow, we noticed that the processor was only running at .79 ghz. The power supply that came with them is 24 watt and not compatible with the PC.We ordered some 65w power supplys off of ebay and now they are great.Check your purchase and what you recieved. you may also be able to do a $15 upgrade and quadruple your speed.