Random shut downs - dying CPU? MOBO? PSU?

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Help me narrow down if its CPU? MOBO? or something else.... I have a computer which I have had for 4 years now... and it's always had this issue of it randomly shutting off. 70% of the time it happens when I am playing high graphics games, but 30% of the time it happens while the computer is idle.

As any pro would first guess, it might be a due to your PSU, then someone will say, oh its probably your RAM, try refitting or replacing. And them someone will say, oh its probably a bad Motherboard, then one will say its a bad GFX card.

So like all of what any new person might think, I have replaced a few parts since I Had an Identical System with similar specs just sitting there, being used as a regular home computer. But mine is more a Gaming computer.

My System specs:

Operating System
MS Windows 7 Ultimate 64-bit

AMD Athlon 64 FX-60 40 °C
Toledo 90nm Technology

Core 0
Core Speed 2860.4 MHz
Multiplier x 13.0
Bus Speed 220.0 MHz
Rated Bus Speed 1100.2 MHz
Temperature 41 °C
Thread 1

Core 1
Core Speed 2860.4 MHz
Multiplier x 13.0
Bus Speed 220.0 MHz
Rated Bus Speed 1100.2 MHz
Temperature 41 °C​

4.0GB Dual-Channel DDR @ 110MHz 2.5-3-3-5
Type DDR
Size 1024 MBytes x 4
Manufacturer Corsair
Max Bandwidth PC3200 (200 MHz)
Part Number CMX1024-3200C2

Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 8
Voltage 2.500 V

ASUSTeK Computer INC. A8N-SLI (Socket 939)

DELL 1800FP @ 1280x1024
512MB GeForce 7900 GTX (BFG Tech) 48 °C

Hard Drives
156.29GB Seagate ST3160811AS ATA Device (Unknown Interface) 36 °C
390.71GB Seagate ST3400633AS ATA Device (Unknown Interface) 38 °C

Optical Drives
NEC DVD_RW ND-3550A ATA Device

500W Ultra (2x 18A 12v rail)- Running to Motherboard ONLY!!
500W Cooler Master (2x 18A 12v rail) - Running 4 Hard Drives, 2 CPU Fans, 1 Optical Drive, and 1 7800GTX GFX Card.

As you can tell, there is enough power to the Computer - my KillWatt meter says im only drawing 220Watts out of the power socket.

As far as the replaced parts go.

I have replaced the:
Memory from CMX1024-3500LLPRO to CMX1024-3200C2

Video Card from 9400GT to 7900GTX OC

Went from 1 PSU to 2 PSU setup

Went from XP to Windows 7 (Same issues With XP Pro, Vista Ultimate, and Windows 7 Ultimate)

Also replaced old Motherboard from ASUS A8N32-SLI to ASUS A8N-SLI.
BIOS updated from ASUS site from 1014 for A8n-SLI to Beta 1614

So guys, Any other suggestions? I have also overclocked and underclocked a bit on this CPU - Its native is 2.6ghz, I brought it down to 2.0Ghz, and now its at 2.8Ghz. CPU Voltage is still 1.55v.

Voltage Readings below
Sensor Properties:
Sensor Type ITE IT8712F v7+ (ISA 290h)
GPU Sensor Type Analog Devices ADT7473 (NV-I2C 2Eh)
Motherboard Name Asus A8N-E / A8N-SLI Series
Chassis Intrusion Detected No

Motherboard 39 °C (102 °F)
CPU 43 °C (109 °F)
CPU #1 / Core #1 47 °C (117 °F)
CPU #1 / Core #2 44 °C (111 °F)
GPU 41 °C (106 °F)
GPU Diode 48 °C (118 °F)
GPU Memory 41 °C (106 °F)
GPU Ambient 40 °C (104 °F)
Seagate ST3160811AS 41 °C (106 °F)
Seagate ST3400633AS 43 °C (109 °F)

Cooling Fans:
CPU 2083 RPM
Chipset 6490 RPM
GPU 1187 RPM (50%)

Voltage Values:
CPU Core 1.55 V
+3.3 V 3.34 V
+5 V 5.11 V
+12 V 12.03 V
+5 V Standby 4.95 V
VBAT Battery 3.10 V
GPU Vcc 3.31 V
Debug Info F 0051 00FF 001A 0000 0000
Debug Info T 43 39 36
Debug Info V 61 00 D1 BE BC BF 00 (F7)


Posts: 6,908   +10
If you can, go back to the way it was setup before you started overclocking and underclocking...
this problem can be one weak component, or using memory modules that are not matched or not the best for your machine...
I would make a log and keep track of what is going on when it fails... because it is difficult to track down... can be anything... hard drive, memory, CPU cooling, poor quality cables or connectors, too much or too little thermal paste...
The age of your computer is a clue that you need to start upgrading components anyway
  • Thread Starter Thread Starter
  • #3
What I did was actually started replacing a lot of the parts already, brand new GFX out of the box (9800 GT -3rd one tried), also none of these components are in a case. All are on the antistatic table with a room fan blowing - so my temps are under 50C. Average 42C.

The only thing that Hasn't been replaced is my CPU, which 4 Years ago, I paid $1000 for. Haha... times.... I really don't want to think that its the CPU. Memory has been switched out from 2 different Corsair brands, Then the performance series XMS, also Cheap Kingston one too. Hard drives have been swapped out a few times. Switch between Samsung, Hitachi, and Seagate.

Like I said, its been 4 years with this system, and I have tried a lot of things. Same issue has existed all this time. I have been running Default Settings from the bios now... Seems like it more stable longer... if I do under clock it all the way down to 2.0GHZ.


Posts: 6,908   +10
I hope your current hard drive is not a Hitachi nor a Samsung...

Except for the screwy problem, you have a good system.

Did you have the problem before you installed the GFX 9800 GT ?

If you have not done this in the past, I would remove your CPU cooler, and clean off the old thermal paste, with denatured alcoholo, then apply a new coat of good quality thermal paste as thinly as possible...
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