Newish computer BSOD and restart problems.

Ok so i built a brand new computer about 5 months ago, since ive gotten it it has really not impressed me I have been getting constant BSOD and just recently restarting for no reason.

I have an AMD phenom x6 1055t processor
ATI HIS HD5850 gpu
asus m4a89 series mobo
700W power supply (four fans running on medium speed)
WD 1tb HDD
patriot 60GB SSD
OCZ obsidian 1600MHZ ram (8 gigs)
At first i was BSOD alot on start up but soon found out it was two bad sticks of ram, I replace those and all was good for a while but most of the time when iam playing a game or just browsing the internet I will BSOD with a few different errors

1: BAD_POOL_CALLER
2: BAD_POOL_HEADER
3: SYSTEM_SERVICE_EXCEPTION
4:VIDEO SCHEDULER HAS ENCOUNTERED A FATAL ERROR

It happens when i play Aion, WoW,Cod pretty much any game it seems to happen when i click on something and or close a program
I never run over 50 degrees C for my CPU and i have constantly kept updating my video drivers, along with ALL my device drivers I am not sure if motherboard needs drivers but one thing i did notice was when i boot in safe mode it says loading something or other and in the lines of text it says windows32\ would someone please help me out or suggest some free to use trouble shooting programs!!!
thanks.