Computer hard freezes even after diagnosing most common symptoms

I have an old socket 754 mb that has been locking up (randomly especially in games) and I have replaced the hard drive, the power supply, and reapplied thermal paste to both the northbridge and cpu and it still locks! Updated all drivers new OS install the works..I just can’t figure it out. By locking I mean a hard freeze which requires a system restart to recover from. I'm almost certain it is an overheating problem as (just to be sure) I took off my side cover and had a giant house fan mounted just outside the case and it occured less often but still it would lock in game (CSS, DOD, Portal, etc.) I'm looking in to replacing the cpu and motherboard with a socket 939 hybrid mb that takes both pci- express and agp, but any other deduction of something I missed would be greatly appreciated.


CPU Type AMD Athlon 64, 2000 MHz (10 x 200) 3000+
Motherboard Name Abit NF8 Series
Motherboard Chipset nVIDIA nForce3 250Gb/Ultra, AMD Hammer
System Memory 1024 MB (PC3200 DDR SDRAM)
DIMM1: Legacy Electronics 88L5HDL0-6RDG 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz) (2.5-3-3-7 @ 166 MHz) (2.0-2-2-6 @ 133 MHz)
DIMM2: 512 MB PC3200 DDR SDRAM (3.0-4-4-9 @ 200 MHz) (2.5-3-3-7 @ 166 MHz) (2.0-3-3-6 @ 133 MHz)
BIOS Type Award (09/11/06)
Communication Port Communications Port (COM1)
Communication Port Printer Port (LPT1)

Video Adapter GeForce 7800 GS (256 MB)
Video Adapter NVIDIA GeForce 7800 GS (256 MB)
3D Accelerator nVIDIA GeForce 7800 GS AGP
Monitor Dell M780 [17" CRT] (5322DE7ACG89)
Monitor HP L1530 [15" LCD] (CNP417BCZ8)

Audio Adapter Realtek ALC658 @ nVIDIA nForce3 250 (CK8S) - Audio Codec Interface

IDE Controller NVIDIA nForce3 250 Parallel ATA Controller (v2.6)
IDE Controller NVIDIA nForce3 250 Serial ATA Controller (v2.6)
Storage Controller VAXSCSI Controller
Floppy Drive Floppy disk drive
Disk Drive WDC WD6401AALS-00L3B2 (596 GB, IDE)
Optical Drive _NEC DV-5800A (16x/48x DVD-ROM)
Optical Drive AA4220V JKO186X SCSI CdRom Device
Optical Drive LITE-ON CD-RW SOHR-5238S (52x/32x/52x CD-RW)
SMART Hard Disks Status OK

C: (NTFS) 205.5 GB (165.4 GB free)
Z: (NTFS) 390.6 GB (310.0 GB free)
Total Size 596.2 GB (475.4 GB free)

Keyboard Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse Logitech USB Wheel Mouse

Printer Canon Bubble-Jet BJ-100
Printer Microsoft XPS Document Writer
Printer Send To OneNote 2007
USB1 Controller nVIDIA nForce3 250 (CK8S) - OHCI USB 1.1 Controller
USB1 Controller nVIDIA nForce3 250 (CK8S) - OHCI USB 1.1 Controller
USB2 Controller nVIDIA nForce3 250 (CK8S) - EHCI USB 2.0 Controller
USB Device Logitech USB Wheel Mouse

DMI BIOS Vendor Phoenix Technologies, LTD
DMI BIOS Version 6.00 PG
DMI System Manufacturer
DMI System Product
DMI System Version
DMI System Serial Number
DMI System UUID 00000000-00000000-00000050-8D74F42D
DMI Motherboard Manufacturer
DMI Motherboard Product NF8/NF8-V (NF3 Series)
DMI Motherboard Version 1.x
DMI Motherboard Serial Number
DMI Chassis Manufacturer
DMI Chassis Version
DMI Chassis Serial Number
DMI Chassis Asset Tag
DMI Chassis Type Desktop Case
DMI Total / Free Memory Sockets 2 / 0
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  1. If any more information is required please just ask and I will do my best to provide, I've waited quite a while and lurked many a forum looking for an answer, trying all presented solutions I could before I finally ran out of ideas...
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