Trouble with 3d games

[deathy]

Everytime i play Wow for about 10 minutes - 2 hours my pc freezes on me, i recently upgraded to windows xp pro, but i was getting the freezes with a blue screen saying nv4_disp.dll caught in an infinite loop. Now when it freezes it just stays there until i manually restart. I have the latest directx and driver for gpu. here are my specs if needed. Oh and my last video card, a Nvidia e-Geforce 7900 gt got fried. Dont know if thats important just throwin it out there.


Windows: Windows XP5.1 (Build 2600) Service Pack 3
Internet Explorer: 6.0.2900.5512
Memory (RAM): 1024 MB
CPU Info: AMD Athlon(tm) 64 Processor 3200+
CPU Speed: 2010.2 MHz
Sound card: Not detected
Display Adapters: NVIDIA GeForce 6800 | NetMeeting driver | RDPDD Chained DD
Monitors: 1
Screen Resolution: 1280 X 1024 - 32 bit
Network: Network Present
Network Adapters: Linksys NC100 Fast Ethernet Adapter - Packet Scheduler Miniport
CD / DVD Drives: D: _NEC DVD_RW ND-3550A | E: LITE-ON COMBO SOHC-5232K | F: FYLAHUP RCX270PAJW
COM Ports: COM4 | COM5 | COM1
LPT Ports: LPT1
Mouse: 5 Button Wheel Mouse Present
Hard Disks: C: 74.5GB
Hard Disks - Free: C: 9.3GB
USB Controllers: 2 host controllers.
Firewire (1394): 1 host controllers.
PCMCIA (Laptops): Not Installed
Manufacturer: Phoenix Technologies, LTD
Product Make: alienware
AC Power Status: OnLine
BIOS Info: AT/AT COMPATIBLE | 10/27/05 | Nvidia - 42302e31
Time Zone: Pacific Standard Time
Battery: No Battery
Motherboard: ASUSTeK Computer INC. A8N-SLI
Modem: Standard Modem
Sierra Wireless AirCard 881U HSDPA Modem #2
power supply: SILVERSTONE ZEUS ST65ZF 650W ATX 12V 2.0 & EPS 12V SLI Certified CrossFire Ready Active PFC Power Supply
Newegg.com has the powersupply and a screenshot of its specs

 

[NExUS1g]

I've had tons of problems when it has come to NVidia drivers and World of Warcraft. It's always been lockups too. Usually they start out happening occassionally and then more frequent as time goes on. The only fix I've ever been able to find is to roll back your drivers to a working version and wait for the next release.