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System freezes....

post #1 of 7
Thread Starter 
Ok, so I move this issue to here:

I overclocked my phenom II as seen in my signature, with the following values:

200 x 19 = 3800 Mhz
VCore: 1.425v
CPU/NB: 1.30625v / x11 = 2200 Mhz
NB: 1.25v

That config passed 3 hours prime95 and temparature during this test never exeeded 53 °C.
For some reason, I get random system freezes when using my PC, even when running at idle and especially during windows startup. After such a freeze I have some difficulties to reboot because after turning the PC back on, the screen remains black, sometimes no signal, sometimes just the blinking cursor in the upper left corner. Trying a few times makes the PC boot normal, but it tells me my OC has failed and I have to change my BIOS settings.

It seems "stable" is not stable......any ideas? I'm really confused.....
Edited by SoulFlight - 6/7/10 at 10:47pm
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post #2 of 7
i'm not sure why your passing 3 hours of prime95 and then it tells you oc fail. but i would just try backing it down a little. try 3.6ghz
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by pieisgood2 View Post
i'm not sure why your passing 3 hours of prime95 and then it tells you oc fail. but i would just try backing it down a little. try 3.6ghz
Same for me, right now I'm trying to get that rig back running, screen still stays black.....
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post #4 of 7
Thread Starter 
Nevermind, looks like one of my RAMs was fried. Memtest gave me a load of errors and crashed my PC, I removed one RAM and now the PC runs normally, although I only have 2 Gig now....

EDIT: Problem is still not solved! This is all really weird. O.O I get BSOD, freezes and restarts when I quit and shift applications.

For example:s
startup
running prime95 for 10 minutes
closing prime, opening an explorer window
*freeze*

or:
startup
running a game
closing it
trying to look up something in my system
*crash*

This is where my system has a tendency to hang in general, once the BSOD screen gave me a message "Page fault in nonpaged area" whats that supposed to mean?
Edited by SoulFlight - 6/8/10 at 4:49am
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post #5 of 7
Disable C1E(BIOS). That thing gave me the same problems.
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post #6 of 7
I see this a lot (been at this 30 years, first overclock was a TRS-80....soldering in faster crystals).

Here's my theory on the concept from this thread, but the bottom line: Long running tests do not prove stability; they can't.

http://www.overclock.net/amd-cpus/74...ml#post9515952

Now, RAM errors are definitely a problem - must have that right. If the RAM is overclocked, perhaps it's just not able to keep up.

If not, you can try a NB bump - sometimes that helps, sometimes it doesn't.

There can be peripheral issues that affect stability (C1E, NB voltage, RAM voltage) - but they're minor. Don't use these to stabilize an overclock, use them to find the upper performance limits.

Engineer an overclock, and stop hoping that your passed tests mean anything - they don't. There are hundreds of millions of circuits in your CPU, hundreds of millions more elsewhere in your hardware - no application can hope to test every permutation of every action capable of destabilizing a system.

"Page fault in non-paged area" - a memory problem. It means an area of memory that was declared as "in use" generated a page fault, as if it were paged out to virtual memory. This is contradictory, and an indication of a minor error either in RAM or CPU where a pointer probably ended up pointing to nonsense.

Errors can occur at times where the result of the error isn't a crash, but that leads to unpredictable conditions of operation which LATER do create a crash, or some other anomalous behavior of the system.

The assumption that "load" somehow stresses a CPU and proves it stable is erroneous. It is NOT load, it is any particular combination of circuits that fire outside their timing limits. Application code can perform normally, and yet not prove the function of circuits associated with privileged instructions which are solely in the domain of the OS, drivers or other exceptional code.

It's not the load, it's the combination of activity that crashes your machine.

Read my post and think more like an engineer....the post suggesting a backoff is on track, but if you learn to find the performance limit and choose a margin intelligently, you can reach high overclocks while retaining genuine stability. The common methods fail to do this about half the time, because they're based on errant assumptions more akin to folklore than engineering.
Edited by JVene - 6/8/10 at 6:00am
post #7 of 7
Thread Starter 
Ok, after a bit of tweaking I realized the freeze problem is gone by setting the NB Speed and voltage to stock value and left CPU values like shown before.

Helps with heat: 51 °C and does not freeze anymore. However, I think I hit a wall now, because trying to go for 3900 Mhz fails to boot and freezes windows in startup screen. Which is a pity cause I still have a bit of temparature to play with. But it seems its not my CPU which is overheating....

I still think my MoBo has to have a minor glitch, because after such a crash or freeze, it takes me a dozend on's and off's to even get a signal on my screen....
Edited by SoulFlight - 6/8/10 at 8:08am
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