Computer periodically freezes / locks up.

Hi, Wall of text incoming, there will be a "Too long, didn't read" at the bottom so don't worry.

Problem started a few days ago, my computer will just stop. It freezes or locks up, unsure of which term would be a better description. There is no responsiveness, mouse freezes, audio stops, if I turn the monitor off then back on it just comes up with no signal detected and I have to force a restart. I backed up all my important files and did what I assumed I had to do for what I thought was corrupted drivers; reformatted it. So fresh copy of windows 64-bit on it and then boom, does the same exact thing 30 minutes into re-installing programs. I have re-set everything on the motherboard, tried removing the GPU and using on-board graphics, different RAM, cleaned CPU fans, etc. Nothing I do changes it, still freezes and locks up, at times I get lucky and it won't freeze for a few hours but then sometimes it will freeze immediately.

TL;DR | Computer constantly freezing, reformatted, removed hardware, tried everything, still freezes, must force restart.


Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: Z68M-D2H
BIOS: Award Modular BIOS v6.00PG
Processor: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz (4 CPUs), ~3.3GHz
Memory: 8192MB RAM
Available OS Memory: 8110MB RAM
Page File: 1889MB used, 14326MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode
Card name: NVIDIA GeForce GT 430
Manufacturer: NVIDIA
Chip type: GeForce GT 430
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0DE1&SUBSYS_082810DE&REV_A1
Display Memory: 4050 MB
Dedicated Memory: 978 MB
Shared Memory: 3072 MB
Current Mode: 1360 x 768 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: SAMSUNG
Monitor Id: SAM07BC
Native Mode: 1360 x 768(p) (60.015Hz)
Output Type: HDMI
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 9.18.0013.0697 (English)
Driver Version:
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail

Any help / ideas would be greatly appreciated.
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More about computer periodically freezes locks
  1. Have you run diagnostics on the memory?

    Sorry....just saw that you tried different RAM
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