Computer has started rebooting

JonJ678

JonJ678

JonJ678

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e8400/ocz ram/asus matx board. What's strange is that it doesn't reboot under load, but while almost idle (partway through a film generally). I've put everything back to stock (hit reset to defaults in the bios).

Sometimes runs for ages, sometimes goes down after 10 minutes.

I think the processor is dying on me. Can't rma it since I lapped it. How do I check this?

Cheers
 
Nope, doesn't freeze. Reboots, loads operating system and proceeds as before. Does this under windows and under ubuntu. No signs of blue screens, the computer just powers off then starts up again.
 
I had this to but after about 2 weeks of this it now no longer boots up (not even to bios).

I can't afford to replace yet but when I looked around the forum a common suggestion seems to suspect the PSU or MB.

(I too was running Ubuntu with Windows in VBox but I'm sure it's unrelated).
 
JonJ678 said:
e8400/ocz ram/asus matx board. What's strange is that it doesn't reboot under load, but while almost idle (partway through a film generally). I've put everything back to stock (hit reset to defaults in the bios).

Sometimes runs for ages, sometimes goes down after 10 minutes.

I think the processor is dying on me. Can't rma it since I lapped it. How do I check this?

Cheers
Click to expand...

Have you gone a bit heavy with the ol' Vcore if you were overclocking?? I hear Intel 45nm CPUs don't like to much for any period of time before suffering permanent damage (something to do with the new Hi-K process).

Trust you used anti-static gloves or a wrist-strap while lapping your CPU (if not = :eek: )

What is case you are using and what PSU?? Thinking cooling potential (former) and build quality (latter).

Presume you used something decent like MX-2 TIM compound?

If I was in your position and really wanted any help I would post a full specification of my rig with CPUz screen shots!! Get off your a*** please!! :cool:

Bob
 
KingZeddy said:
could well be the PSu as Bob says a full spec post would help
Click to expand...

I said nothing of the kind!! :D Mainly because we haven't even been told what make and model the PSU is!!

I would recommend no one to post anymore responses on this thread till the OP gets off his a*** and posts more detail on his rig!! :rolleyes:

Bob
 
Bob Wya Jnr said:
I said nothing of the kind!! :D Mainly because we haven't even been told what make and model the PSU is!!

I would recommend no one to post anymore responses on this thread till the OP gets off his a*** and posts more detail on his rig!! :rolleyes:

Bob
Click to expand...

I agree, oh.. Wait.... :eek:

Full spec, otherwise we'll be here for days suggesting you buy/swap enough you'll end up with a new rig through testing each part!
 
JonJ678 said:
e8400/ocz ram/asus matx board.
Click to expand...

My bad, I'd have thought the opening line was sufficient for system specs in this case. 2x2gb 800mhz ocz gold "vista series" and the P5E-VM motherboard.
The power supply is the "Hiper 630W HPU-4M630", now I know hiper get some abuse but this was a well researched choice that has comprehensively outlived my ocz elitexstream. As it isn't even running a graphics card at the moment I'd be astonished if the system is rebooting from lack of power.

Case is a reasonably nasty gigabyte model bought because the missus thought it looked pretty. Cpu isn't overheating, unless 65 under load counts. It cant be over 40 degrees when it reboots.

Highest vcore I've offered the processor was 1.45V for an hour or so. This is over the intel recommended, but as I'd lapped it anyway losing warranty didn't worry me too much. Bit thrown by the system crashing while idle at stock speeds. Anything else to check? Trying a different cpu is a lot of effort, whether sat on my arse or otherwise.
 
JonJ678 said:
The power supply is the "Hiper 630W HPU-4M630", now I know hiper get some abuse but this was a well researched choice that has comprehensively outlived my ocz elitexstream. As it isn't even running a graphics card at the moment I'd be astonished if the system is rebooting from lack of power.
Click to expand...

Hi Op

Sorry 'bout the rant - but I've seen so many threads started like that on THG - it starts to get really annoying!!


Hiper build quality is OK. I have a 880W type-M model I am using for a new build (to be substituted with something better at some point I think).

Very difficult to test power supplies for problems accurately. You would need a logging digital multimeter with a RS232 connection. Don't forget it's quality of power - not quantity - that you are most concerned with!!

Got a substitute (good) PSU lying around per chance or a (very good :cool: ) friend with a high-end rig??

It's worth "ruling out" the power supply first - as it provides the main foundation for system stability (or instability!!)


I presume you've got decent case (??) cooling??!!


The Vcore issue only applies when running a CPU for extended periods of time (unless it's very high!!)

I wouldn't think that lapping a Core 2 CPU would do much harm. The Land Grid Array (LGA) style socket hasn't any pins to be damaged after all (trying lapping a socket 939 Opteron)!! As long as you took antistatic precautions during the lapping process I am sure the CPU will be working fine!! :cool:


Bob
 
If it was static damage, Id be surprised for it to run fine for months then suddenly throw a strop. Equally, I'm not sure voltage damage from years ago would do that either. You may be onto something with the psu, I've got a 860W PC power&cooling which I very much doubt is faulty in my other computer. I think I'll try that before changing processors around. Got to be easier to try a different one than hooking it up to an oscilloscope/data logger pair.

The case is nasty, as is cooling, but as the overclock was minor and is now zero, and temps are fine, I doubt changing case is going to help. Interesting that you think the cpu might be alright. I took no antistatic precautions while lapping whatsoever, beyond the obvious of not wearing jumpers etc. I'm doubtful that this is the problem, as it was lapped carefully with the plastic cover protecting the contacts. Dead psu would be generally good news, its cheaper than an e8400.

I wont be doing anything with this for a couple of days, as watercooling the prettier computer (with the better psu) takes precendance for a bit, but I'll report back in a few days. Cheers
 
blimey, static is being more hyped up than the BBC's "nitrous oxide is bad and itll KILL YOU ALL!!!11111" storey the other day.

i wouldnt worry too much about that to be honest unless you were lapping it holding the CPU pins, while wearing your best nylon socks and rubbing a balloon on your hair.

my suggestions would include running memtest for starters.
 
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