This program really does work. I have a Dell Optiplex GX1 (from when Dells were white) with a 600mhz PIII, 512mb ram, and a 16mb Nvidia Riva TNT 2 graphics card overclocked 20%. I ran Passmark Performance Test 6 before and after the program. My average improvement overall was ~ 10% My cpu did mathematical operations 7% faster. My ram was accessed 8% faster. My 3d graphics was 5 % faster, my simple graphics was 10% faster, and my ram was read an write 10% faster. However, there was no hard drive read and write improvement