Piriform Speccy Professional provides advanced realtime System Information tool for your PC for diagnostic and monitoring purpose. It can show detailed statistics on CPU, Motherboard, RAM, Graphics Cards, Hard Disks, Optical Drives, Audio support. Additionally you can see the temperatures of different PC components. Such a software will help you while buying or selling a PC to quickly list out the components if it has the label says it has. The professional version automatically updates to the latest version.
Piriform Speccy Professional costs 19.95 USD.