BSODs playing BF3 and Batman Arkham City

Specs,
CPU: I5 2500k
PSU: CORSAIR Professional Series HX850
MOBO: ASUS P8Z68-V PRO LGA 1155 Intel Z68
MEMORY: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
GPU: EVGA SuperClocked GTX 580.
HDD: Vegance 500 gb 7600 rpm

Windows Vista 64.

i built my system 2 months ago, every part is new.
so here's my problem, i played it fine for the first month, no problem no crashing.
One day i came home turn on my pc, and i had a LED mobo light turned on, it was the Memory LED, so i went online i i guess i had to click the led until it flashes, then the MOBO read the memory again. since then i been having BLUE SCREENS, , " MEMORY CORRUPTED" "MEMORY MANAGER"

IRQL_GT_ZERO_ AT_ SYSTEM_SERVICE
STOP: 0X0000004A (0X00000000075783D09, etc....


then i got another one.
STOP: C000021A {FATAL SYSTEM ERROR}
0X00000000 (0XC0000428 0X00100528)

I get different error codes most of the time,

i was thinking i will b my memory, but windows reads it fine, and this only happens when im playing a game, the game runs for 2 mins and bang i get blue screen,

so yeah i tried everything, memory tool, windows didn't found any error, my cpu temp is 40c, i have an antec 900 with 5 fans, so i don't think is overheating problems,

Also, i uninstalled my old GPU drivers, and installed a new ones, and when i did that i could play teh game for 7 mins, but i got blue screen again,

so last night i decided to install Windows again, i was thinking is probably a corrupted driver or file in windows.

can u guys help me plz. thanx
 
Remove 1 4GB stick of memory and try playing a game. If you still get BSOD's swap the memory modules and try playing again. If you get no BSOD's using 1 memory module you will know what module is bad. The computer will run okay with just 4GB temporarily...
 
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