Everest has some benchmark tests at the bottom of it's menu. After the test, it shows your results in a window and compares it with many different PC configurations.
You look in the list for a similar configuration to your PC and compare it to your result.
To choose a similar model PC to your's for comparison, you need to match as closely as possible the exact chipset, CPU speed and RAM type/speed.
If you can't find a comparitive PC in the list, you may not be configured properly. If your PC shows a below average result in the comparison, you may not be configured properly, especially if there is a large discrepency.
Repeated tests will show you if your tweaking efforts are producing real and measurable results.
Another good program, and probably a bit more comprehensive in the benchmarks, is SiSoft Sandra Lite 2005.
http://www.sisoftware.co.uk/?dir=dload& ... angx=en&a=Everest can be used to get other system info that helps us overclock and tweak, such as verification of cpu speed, front side bus speed and ram timings.

Mainboard: Asus P5K-Premium, CPU=Intel E6850 @ x8x450fsb 3.6ghz, RAM: 4gb PC8500 Team Dark, Video: NV8800GT, HDD: 2x1Tb Samsung F3 RAID-0 + 1Tb F3, PSU: Antec 550 Basiq, OS: Win7x64, Display: 24&