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System Lock-Ups?! FSB Wall..?

post #1 of 8
Thread Starter 
A while back, the highest FSB I could stably reach and run at was 266 (1066 Quad pumped) and anything after would typically crash. However, just last night, I decided to try for 270. It worked! My PC booted at 4.32Ghz and went right to Windows without an issue, HOWEVER, 5 or so minutes into Windows (before I could snap a CPU-Z validation), the PC locks up

Now does anybody have any idea why this is happening? Everything seems fine for the first few moments.. Vcore was set to 1.5 in bios, 1.47 actual. Chipset voltage was 1.6v, FSB Termination was 1.5v, memory voltage 2.6v. Spread spectrum disabled, PCI locked at 33mhz and PCIE locked at 105mhz.

Any input is GREAT! I would love to be able to push past my current suicide shot, expecially because even at those high voltages, my CPU idled at 34C

Thanks in advance!
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Sandy Beach
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post #2 of 8
I've heard of degradation and FSB walls dropping downward, but cant remember when ive seen it going the opposite way .

Where any of the voltages changed by any chance? Also where any fans/cooling devices added or speeded up recently?

Could have something to do with ambient temps of the room, and i've also seen occasions where FSB:Mem ratios have made a difference which also brings up the question if you've changed the clock of your memory lately?
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cour tew duo ftw!
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post #3 of 8
nice temp.

ur pushinh to hard i think just do the best stable oc i geuss, but im not into intel so i dont know.
never owned a intel expect for my lappie
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by AegisFLCL View Post
I've heard of degradation and FSB walls dropping downward, but cant remember when ive seen it going the opposite way .

Where any of the voltages changed by any chance? Also where any fans/cooling devices added or speeded up recently?

Could have something to do with ambient temps of the room, and i've also seen occasions where FSB:Mem ratios have made a difference which also brings up the question if you've changed the clock of your memory lately?
I have tried to recently run my memory at a higher frequency, but it wouldn't do 460 or 470 even at 2.9v :-\\

And when I went for the shot, I used my lowest divider, running the RAM at 412, which I KNOW it can do as it reaches 450 without a hitch. Anybody have any ideas? It doesn't seem right that I can boot at those clocks, but the system crashes after a few moments... like something in Windows tries to load, but crashes the system or something

Could the NB be getting too hot? I think it was only at 44C when I booted

EDIT: Is it possible that I need to raise/lower my PCI-E clock since the FSB has been jacked up? I'm at a loss Though I've heard other 915P boards from ASUS can go to 290FSB and a Gigabyte hit 315... so it seems possible.
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Sandy Beach
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post #5 of 8
Thread Starter 
I just found this article on AnandTech about Intel's Overclock Lock and read through the entire thing. It seems that some ASUS boards are able to reach up to 290FSB based on the 915 chipset! However, it says that the 915 uses the CPU clock to determine the PCIE and SATA frequencies, which is what causes lock-ups at FSB's over 10% OC. But my motherboard supposedly has a PCI-E lock (at 105 currently) and I don't use a SATA HDD anymore because I gave it to my dad, so I'm on IDE again.

So based on this article, do you think a LOWER PCI-E lock could help? I believe it goes down to 90mhz... but whether this is the ACTUAL frequency is debatable since the 915 calculates the PCIE clock based on CPU frequency (supposedly).

Any help/input would be great! Thanks!

EDIT: Could it hurt to run a lower PCIE clock just to try it?

EDIT2: THIS article also says that they used the "Auto" PCIE frequency to attain an FSB of 279! They say that the Auto setting was Asus working it's magic to break the overclock lock.. just another piece of the puzzle
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Sandy Beach
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post #6 of 8
Thread Starter 
Alright so I booted at 270 with PCI-Express at 'Auto' setting in BIOS and now everything seems fine for 3-4 minutes, but then crashes with a "Bad pool caller" BSOD. However, at least the system isn't hanging like it did before! Now I only tried once so the BSOD could be a fluke, but what do you guys think the issue could be?

I think it's supposedly driver related according to Microsoft, but everything seems to initialize... could it be the onboard audio or something? My gigabit LAN still works at 270..

TIA!
Sandy Beach
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Sandy Beach
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post #7 of 8
Thread Starter 
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Sandy Beach
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Sandy Beach
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post #8 of 8
Well, I wish I were a little more well versed in the P4 arena, my knowledge of that died after the 478 socket. It simply sounds like you need more voltage to me. Either/both to the core and the chipset. Let us know.
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Raptor Raper
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