is a useful benchmark suite, that lets you to test your CPU, memory, HDD and video (GDI, Direct Draw, OpenGL) subsystems.
OS Win: 9x/ME/NT/2K/XP/2K3

collects and displays system configuration information for your computers. This includes information about system configurations
OS Win: 98/ME/2K/XP

is a powerful utility designed especially for detection of hardware, but also some more analysis.
OS Win: 9x/ME/2K/NT/XP

is a utility designed to analyze and benchmark your computer system. It can analyze and benchmark many kinds of hardware, such as CPU performance, hard disk performance, video system information, mainboard / motherboard information, and much more...