Random freeze

I am currently getting random freeze. It happen when gaming, surfing the web and even when Im not there and nothing special is running.

I also notice that its only freezing once a day. Once the computer has frozen it will never freeze again the same day.

For a week Ive remove the side pannel of the case and no freeze has happen. Almost 2 hours after ive put it back it froze.

My gpu and bios are up to date.

Ive done tests:
OCCT cpu 1hour passed
OCCT gpu 1hour passed
OCCT psu 2hours passed
memtest passed

temp are :
cpu idle 42 full 67
gpu idle 50 full 89
case idle no pannel 26 full 26
case idle with pannel 33 full 42

Does anyone have a idea what is happening?

Here are my spec:
case: Coolermaster Wave Master
HDD1: WD Caviar Black 640GB SATA3
HDD2: Seagate 320Gb
DVDRW: Lite-on 16X Dual-layer
Motherboard: Asus M4A78-E
CPU: AMD phenom II X4 965 BE rev3
RAM: OCZ OCZ2G8004GK (4*2go)
GPU: XFX Radeon HD 5770 1GO
video capture card: Hauppauge Wintv-HVR 1250
Heatsink: Noctua NH-C12P SE14
PSU: Corsair AX750 CMPSU-750AX

2 answers Last reply
More about random freeze
  1. Anyone has a suggestion that I could try to identify the problem and maybe stop theses freezes?
  2. I find out that it may be a problem with asus mobo and ocz ram here:http://www.tomshardware.com/forum/198339-31-asus-memory-real-problems-rumours

    What do you think about it?

    I got a older set of ram but to remplace it, it would implie to take off my cpu heatsink to take off the ram cause its too big. So if there is another solution before i try this one it would be great.
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