Help please: random reboot problem with new E6600 build

[DaisyHead]

Here?s my original part list:

Asus P5B Deluxe
E6600
Tuniq Tower 120
G.Skill PC2 6400 2G
XFX 7600GS Fanless
Antec P180
Antec Neo HE550
Raptor 74G
Samsung DVD IDE
XP Pro OEM

I carefully built up the system and began experiencing random reboot problem. No particular software can be pinpointed, it was totally random and not under load.

Here?s the error message I got.

STOP:C000021a {Fatal System Error}
The windows subsystem system process terminated unexpectedly with a status of 0xC0000005 (0x******** 0x********)
The system has been shut down

I began my troubleshooting adventure.

Temp: The case is open in a cool room. Confirmed all 4 of my 120mm fans are running. CoreTemp says my idle is 27c and even with Orthos running it?s only 40c. So I feel my temp control is good.

RAM: tried moving to different slots, tried one stick at a time, ran MemTest for 8 hours with no error. Installed a different pair of Kingston RAM and still got random reboot. So I ruled out my G.Skill as the problem.

Video: put in a different new XFX 7600GT. Same problem.

BIOS: updated from 1004 to 1101. No help.

Virus/Malware: fresh OS with only diagnostic tools. No internet connection yet.

I RMA?d the MB and got a replacement P5B Deluxe ? thinking maybe there was a bad circuit or bum capacitor. Also bought a new Corsair 520HX PSU. Installed them up and, you guessed it, same problem.

I switched HD to another Raptor 36G that I have and used a different XP Pro disc to install the system. Same problem.

Confirmed that Temps are still good: all 4 - 120mm fans are running.

CoreTemp: idle is 27c and with Orthos running it?s only 40c.
Speedfan: idle system 34c idle CPU 34c. With Orthos running, system 38c, CPU 50c.


The BIOS says my voltages are:
Vcore = 1.296v
3.3V = 3.312v
5V = 4.966v
12V = 12.091v

At idle Speedfan and Asus PC Probe II said my Vcore is only 1.14v and under load they register 1.29v.

The only suspect left for me is the CPU. Tell me it ain?t so.

I REALLY NEED SOME HELP TO TROUBLESHOOT NOW. THANKS FOR ANY SUGGESTIONS.

 

[DaisyHead]

I left Asus PC Probe on as I ran Orthos and there was this window that came up after a few minutes:
PC Probe Warning
Vcore Voltage

Vcore was sitting at 1.29v. Is that low?

 

[LittleNemoNES]

manually set it @ 1.35 and see if that helps.

 

[DaisyHead]

I manually set it to 1.35 and still no cigar. System reboot randomly like usual

 

[JustaGeek]

Try a different Power Supply.

 

[DaisyHead]

I started with the Antec PSU and then switched to a Corsair PSU. No difference.

 

[DaisyHead]

Here's a funny thing. I set Vcore in the BIOS to be 1.35v. These are the readings I get:

CPU-Z = 1.312v
Speedfan = 1.31v
PC Probe = 1.31v

Which one do I trust? Am I still low?

 

[JasonCoder]

This is why some days I'd just rather buy a pre-fabbed box from Dell or someone. I added an 8800 to my rig and suddenly I blue screened on every boot. Turned out (after several days of f*cking with the bios) that it didn't like explicit factory recommended memory timings. SPD on and away we go, boy was that fun to go through.

 

[SerpentRoyal]

Take the board outside of the case and put it on the P5B's box. Connect only the mouse and keyboard. Reflash BIOS and set to Optimum DEFAULT. Wipe HDD and clean install windows. Load all drivers except video. Now check for problem. If okay after a few days, then make an image file of the OS and load the video driver. Recheck for stability.

 

[Zeldovich]

I had the same problem with an E6600 (stock speeds and voltages) with an Intel d975xbx2 motherboard. I ended up switching the processor for a spare Pentium D805 and the computer stopped producing bluescreens. Later, I put in an E4300 and overclocked to 2.8 GHz, and it's still stable, so I think my original processor was faulty. Try switching the processor if you have another one on hand.

 

[SJP0tato]

I agree with Zeldovich, see if you can RMA the processor. It sounds like this is the last component that you haven't been able to substitute a new/working part.

 

[DaisyHead]

Guess I will have to bite the bullet and rip up the board one more time to get to the processor for the RMA. Boo Hoo Hoo for me!!!

 

[videopho]

Try to run Memtest86 to rule out possible bad rams.

 

[DaisyHead]

Originally posted by: videopho
Try to run Memtest86 to rule out possible bad rams.

RAM: tried moving to different slots, tried one stick at a time, ran MemTest for 8 hours with no error. Installed a different pair of Kingston RAM and still got random reboot. So I ruled out my G.Skill as the problem.

 

[videopho]

Possibly a bad e6600?
Run Super_Pi 32m then
Try to run Orthos for at least 12 hrs.
BTW, I just built mine 3 weeks ago (see sig#2) and it's been rock solid eversince.
In fact it's the most stable rig I'ever built, thus far as compared to my rig #1 in which today I still experience random freezes for no apparent reason, especially when using either IE7 or FF 2.04.

 

[Cybercraig]

Sigh! Another Intel "buggy" core. I'd wish you luck with a new one but as far as I know they are all full of bugs. Try spraying your 775 socket with some RAID before you mount the CPU. :laugh:

 

[aigomorla]

Originally posted by: Cybercraig
Sigh! Another Intel "buggy" core. I'd wish you luck with a new one but as far as I know they are all full of bugs. Try spraying your 775 socket with some RAID before you mount the CPU. :laugh:

ROFL.... this is ment as a joke. Dont follow it.

 

[kevman]

Any progress?

 

[DaisyHead]

I'll have to rip up everything to get to the CPU before calling Intel because they want all the numbers on it for the RMA. Probably another week before any update on this saga.

 

[nyker96]

Did you update the P5B to newest BIOS? I had some BSOD before a BIOS update solved it. HX520 should be no problem as a PSU unit. It could be CPU but I seriously rarely see a bad one, almost never in CPU arena.

 

[KingOfF00LS]

Originally posted by: DaisyHead
Here's a funny thing. I set Vcore in the BIOS to be 1.35v. These are the readings I get:

CPU-Z = 1.312v
Speedfan = 1.31v
PC Probe = 1.31v

Which one do I trust? Am I still low?

I'm curious...if the core is supposed to be 1.35v and you're getting 3 readings that it's below that why not manually bump up the vcore until it gets to 1.35 and then see if the problem goes away?

 

[DaisyHead]

I updated the BIOS from 1004 to the latest 1101 which didn't help.

I've systematically replaced pretty much all the components and the CPU is the only thing left at this time.

 

[DaisyHead]

Originally posted by: KingOfF00LS

I'm curious...if the core is supposed to be 1.35v and you're getting 3 readings that it's below that why not manually bump up the vcore until it gets to 1.35 and then see if the problem goes away?

I did and it didn't help.

 

[lopri]

Do you have a friend to loan you a LGA775 CPU? If not, it's not a bad idea to purchase a ~$30 Celeron for testing and emergencies.