PC Randomly Restarting - Help!!

LeoPheonix

LeoPheonix

LeoPheonix

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Joined
26 Aug 2007
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136
Sorry long post, but this seems to be a strange issue! :rolleyes:

I have the following:

Asus Maximus Formula SE (BIOS 0907)
Q6600 G0
4GB Dominator PC2-8500 (4 x 1GB)
Nvidia 8800 GTX
Enermax Galaxy 1000w PSU
2 x WD Raptor 74GB RAID 0
Hitachi Deskstar 7K1000 1TB
2 x Barracuda 7200.11 Raid 1
Vista Ultimate 64Bit
Dell 2407WFP HC

I have the system overclocked at 400 x 9 (3.6Ghz) and the Vcore voltage set to Auto. Any manual voltage I set caused the boot to fail. On auto the voltage is set to 1.39v

The Ram runs at 1066MHz has a voltage set of 2.17v

I am using BIOS 0907 as it is the later bios do not allow me to overclock using auto.

My Voltages are:
CPU: 1.39v
North Bridge: 1.65v
South Bridge: 1.09v
DIMM: 2.16v

The issue I have is that the PC randomly reboots but mostly I notice it when (in order of likelihood)

1 – Playing games
2 – Web browsing with Firefox and using MWP (never crashes with IE but not used IE with WMP)
2 – Streaming video from the PC

The PC does randomly reboot at other times when I am away from the PC too - maybe a couple of times a week

When the PC reboots the CPU temps seem okay – around 60 max, and the GPU and NB temps are okay although the Northbridge idles at 57/58C which is a bit warm.

I have rebuilt the machine and it reboots exactly as before. I am thinking there is an issue with the Motherboard, Memory, or Graphics Card.

I am thinking of switching to 2 x 2GB sticks of memory as that seems like the easiest fix, after that I would consider changing the mobo probably to the Asus Rampage Formula and finally the gfx card.

Have any of you got any suggestions / theories on this? :confused:
 
Last edited:
Can you manually set the vcore and boot at say 3Ghz?

If so, work your way up slowly from there.

You may need to alter other voltages to get stability.

No easy, cut corner route I'm afraid.:(
 
Greebo said:
Can you manually set the vcore and boot at say 3Ghz?

If so, work your way up slowly from there.

You may need to alter other voltages to get stability.

No easy, cut corner route I'm afraid.:(
Click to expand...

I tried to start around 3.2 but still no joy - i left all other settings at auto while i change vcore. shoudl i be changing others as well?
 
I have sorted the voltage problem out (i was reading 1.15v as 1.5v!) I have run prime 95 small FTT for 10 mins and a a couple of shorter times with no problem apart from core 4 threw up an error twice??

However the blend test reproduces the problem everytime so I guess I have an issue with the memory. The question is - is my memory faulty or are the voltages wrong? I am not overclocking the memory and I am running it at 1.4v

Any Ideas?
 
my first task would be to establish if its a simple case of your overclock being too high

or anything at fault

if you run it at stock does it still reboot ?
 
Try memtest for the memory. Run the memory at stock speeds though. If fine, then not your memory. If fails then RMA time.
 
This issue has now been solved.

Put simply the issue was running 4 sticks of RAM in the motherboard caused the memory to malfunction. Running any combination of 2 sticks allows me to rune Prime95 for hours. As soon as I put in 4 sticks – even at stock and a reduced RAM speed the test fails and the reboot occurs.

I am replacing my 4 x 1GB sticks with 2 x 2GB.

For more info these post from the Corsair support forum detail it well:

http://www.houseofhelp.com/v3/showthread.php?t=64360

http://www.houseofhelp.com/v3/showthread.php?t=69333

http://www.houseofhelp.com/v3/showthread.php?t=69449

I post this here to help any other who have this issue.

Cheers
:D
 
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