The Ultimate Boot CD

I have just discovered this neat bootcd, that is a collection of your favorite tools, such as

Prime95: CPU/Ram stress utility
Memtest86: Ram tester
CPUid information
System information
CPU benchmarks
3d benchmarks

Many bios, harddisk installation and diagnostic tools as well

You can see the entire list and download it here.

Download the .iso and burn it using your favorite burning software, I prefer imgburn.