CrystalDiskMark is what I use to measure read/write speeds
http://majorgeeks.com/CrystalDiskMark_d5574.html
This is cpuid hardware monitor...temps for video, cpu, north bridge, and some other temps. not to sure about hard drive temps tho.....
http://majorgeeks.com/HWMonitor_d5842.html
My SSD's are for the OS and Crysis wars. The only game I play so far. Try installing the game you play the most on your SSD drive. It should make it a lot faster to play and load.
(note)I never liked steam as I have had nothing but problems with that. I just buy the game(disk) and install it directly...(just an opinion on that)
Thanks to those who explained what trim was for as I was not sure.