Windows 7 - Window 7 ultimate 64bit random freezes/crashes

Any help would be appreciated!! I guess recently I have been having problems when I game specifically Bad Company 2. I am running eyefinity with sapphire 5870. Normally I'll hit tab to check my score or hit Enter to go to the squad menu, sometimes it will just freeze then desktop I go. It happens on occassion could be 1 hr into gaming or 3hrs into gaming. Anyhow, here is a crash report I discovered in the BFBC2 folder:

<?xml version="1.0" encoding="UTF-8"?><report><version>2</version><sessionid>38fb22844c4fb6f7</sessionid><type>crash</type><sku>ea.dice.RomePC.Cl</sku><createtime>2010-07-28 07:37:07</createtime><buildsignature>553292</buildsignature><systemconfig></systemconfig><categoryid> 0x61D866</categoryid><stack> 0x61D866 0xCD3A6B 0xCDA77D 0xCEDE9E 0xCEE518 0x69920E99 0xCD43D0 0xD8C0EF 0xCD8EC0 0x13F3758 0x9089AE 0x62B8E2 0x74C2166B 0x857270 0x16355E0 0xFB4432 0x16356D0 0xA50D2B 0x74C2166B 0x62BEB9 0x595F3B 0x74C21126 0x596149 0x74FA0849 0x591B4E 0x591B4E 0x153BD80 0x5992A6 0x153BDA4 0xAAF058 0x14B6808 0x73D929BB 0x153BD80 0x73D98CED 0x73D92A47 0x74C23677 0x77069D42 0x74C49775 0x74C49775 0x770A03DD 0x77069D15 0x73D929E1 0x73D929E1</stack><threads></threads><screenshot></screenshot><memdump></memdump><contextdata>registers: Edi 50d9dc70, Esi 00000000, Ebx 1bfc1db0, Edx 00000000, Ecx 0d3ab430, Eax 20f604d3 Ebp 0ea8fa50, Eip 0061d866, Esp 0ea8fa40</contextdata></report>

I just ran Mem Test x86 v 3.4 for 8:18 (that's 8 hrs n 18 mins) and passed.......Also recently encountered another problem. Here is a link I guess this guy's thread says it all the only difference between us is his MB is a gigabyte n mine is Asus p6t deluxe v2.
[Solved] No POST/boot after normal shutdowns - Gigabyte P35-DS3L - Gigabyte - Motherboards-Memory
All my problems are the identical.