I am planning to upgrade this thing. It has an AMD 2.6 GHz CPU, 4 GB memory and a 32 bit WIN 7 O/S. I want to put an AMD 3.3 or 3.4 GHz CPU in there, add 4 GB more GB to the memory and install a 64 bit WIN O/S. Budgetwise, the sky's the limit. I would like to spend as little as possible. I would eventually like to sell it on Craigslist. This case is from somewhere around the years 2000-2003. I think these things are called "dinosaurs." Anyway, it's not nearly as old as I am. Check out the pix. I call it Hitler because it has a little moustache for a power button. Look at the ventilation.