For testing, the drives are all wiped and reset to factory settings by HDDerase V4 which you can get yourself over here. We try to use free programs and some real world testing so you can compare our findings against your own system. This is a good way to measure potential upgrade benefits.
Test System:
Kingston SSDNow V+ Series 128GB SSD
OCZ Vertex 128GB
Intel X-25M 160GB SSD
Corsair P128 SSD
CPU: Intel Core i7 875k
Cooler: Noctua NH 14D
Motherboard: Intel DP55WG
Hard Drive: Western Digital 1TB
Memory: Crucial Ballistix Tracer 1600mhz (4gb)
PSU: Enermax 1250w Revolution
Graphics: Zotac GTX465
Chassis: Silverstone Raven 2
Operating System: Windows 7 64 bit Ultimate
Monitor: LaCie 730 30 inch LED screen
All our results were achieved by running each test five times with every configuration. Median averages were extrapolated from the results – this ensures that any glitches are removed from the results. Trim is confirmed as running by typing fsutil behavior query disabledeletenotify into the command line. A response of disabledeletenotify =0 confirms TRIM is active.