Recently my desktop has been experiencing random lockups.
By this I define a total system freeze, CTRL+ALT+DEL does nothing, LED's on keyboard don't turn on/off, unplugged/re-plugged mouse & keyboard don't light up/confirm connection (via the desktop sound effect).
SPEC is:
- OS: Windows 8.1 Pro
- Mobo: AMD Asus Sabertooth 990FX Rev 1 AM3+
- CPU: AMD Phenom ii X4 965 BE @ 3.41GHz (With CM TX3 Hyper Evo Cooler)
- RAM: 2x Corsair Vengeance 4GB @ 1333MHz (Dual Channel)
- RAM: 2x Corsair Vengeance Pro 4GB @ 1333MHz (Dual Channel)
- GPU1: AMD Sapphire HD 7770 Flex 1GHz 1GB
- GPU2: AMD XFX HD7770 Series 1GHz 1GB [GPU's In Crossfire]
- PSU: Cooler Master G650M (650w Bronze 80+ SLI/C-Fire Certified)
- SSD: OCZ Agility 3 60GB
- HDD1: 500GB WD Blue (5400rpm)
- HDD2: 750GB WD Black (7200rpm)
- CD/BluRay: Sony CD Rewriter & LG BluRay Rewriter
I've checked the status of each drive, SSD and HDD2 report no errors, with HDD1 reporting a warning on "Reallocated sectors". This shouldn't be the cause of the lockups as the drive was disconnected before and was only reconnected a day after the lockups began.
Internal Temps seem normal, all range between 30 and 45 degrees centigrade, fans all are spinning with no grinding sounds or shorting sounds.
MemTest86+ reports no errors on any of the sticks of RAM. (Tested each stick one by one)
Wiped and re-installed Windows, installed all updates + required drivers. Lockups are still present.
Lockups are following no fixed procedure, they occur randomly and without warning.
Looking at the above, I believe to have narrowed it down to either the CPU or the Motherboard. Whilst I am not a professional technician, I welcome anothers opinions on this.
Update!!
I've removed all drives (Except SSD) and the XFX GPU.
System did freeze after boot up (video output continued, but all inputs ceased). running fur mark seems to be stable on graphics card (max temp of 60c)