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SIGH! My OC'ing WOES! **EDIT ** Making progress thanks to "DivideBYZero"

M

mjolnir2k

Senior member
Well here goes,

I have been trying my hand at OC'ing my rig. I try to read up on the info b/f i try anything new and have managed (with the generous help of the Anand'ers) to learn quite a bit. Unfortunately I STILL have problems with OC'ing my system. I have gone to great pains to get my rig configured for OC'ing (all components are OC rated, Plenty of active / passive cooling and the Memory is high quality CAS-2)

Here's what I have done and the associated problem:

I set my multiplyer from default to 12.5 and my system boots up at 1533 no problem. It runs (seemingly stable) for about 2 hours and then I get the blue screen of Death and an error message to the effect of "Memory dump in progress"...In a panic I frantically press the "reset" button and re-boot. I then go back and change the multiplyer back to default, at which time the system will run stable (as it should) for days and days!

Now, when I am OC'ing I check the CPU temp at 30min intervals and I NEVER exceed 42-45 degrees (even under extensive gaming). I have run 3dMark2001se with no problems as well.

Why the BLUE SCREEN OF DEATH? What does the error message mean? Why am I cursed?

I am thinking about going the FSB route to OC'ing now. Which brings a whole new set of ??? into play.

**What is a safe FSB for my rig? (meaning, what can my PCI and AGP devices handle)
**Do i need to adjust VCore? To what level (stock is 1.75)**
**Is FSB OC'ing better or Worse (safer?) than Multiplyer OC'ing?

WHAT WOULD YOU DO TO OC THIS SETUP?

Damn, wish i could just hit the "TURBO" button and be done with it!

Thanks guys / gals for the continued education!

 
You may have just hit the wall, but check the following:

- Case ambiant temp: If too high your mem may be getting too hot and causing the BSOD
- Check the temps more than 'once every 30 mins. Have HW Monitor running all the time for 2 hours, keep an eye on it.

12.5 * 133 = 1662 not 1533, you must be @ 11.5*133.

Try 11*133 for two hours. Stable?
Try 11*135(1485) for two hours, stable?
push to 11*137 for 1507, your PCI will still only be 1.25Mhz over spec, not anything to worry about. Stable?
Try 11*138, Stable?
Try 11*139, Stable?
Try 11*140, this is still only 9% overspec on PCI and should work fine even with the most touchy PCI hardware.

If it pops after two hours at 139 or above then it's your CPU, you've hit it's limit. back off to the last known good speed and thats it. The limit cannot be guaranteed even with 'choice' Batch codes.

My AXIA goes to 1533 and boots occasionally @1.6. The stable speed is 1533 and now I've found it, I keep it there.

Hope this helps

BTW, FSB overclocking is not THAT dangerous, just remember this:

Default PCI bus speed is 33Mhz and is derrived from your FSB. The AGP bus is also derrived from this and is set to a multiple of the PCI depending on mode (2x = 66Mhz, 4x = 133Mhz) Use the boards divider value (most common is 4) to work out your PCI clock, and just hope your hardware can handle it. Most hardware can take 10-15% overspec on the PCI bus from my experience.
 
And this, Ladies and Gents, is why this forum and it's members are worth their weight in gold.

Thanks for the VERY detailed answer.

I will be trying this tonight!

Thanks again.
 
Well, I went home at lunch and played around with the FSB for a bit. Here's what I got:

FSB = 140
Multiplier = 11.0

1540 mhz
Temp = 42 to 44 degrees C

Ran 3dMark 2001SE without a problem. had it running for about an hour with no troubles, then brought it back down to 133 fsb @ 10.5 until I get home to play with it again.

Obviously did not have time for the long term test, but it seemed to be holding steady at 140 fsb going to increase it a bit (up to 150?) tonight and see what happens. Also, I don't want to stress my PCI goodies too much with TOO high an FSB setting. If I can get it to run stable at 1540 (which it "seemed" to be) then I will be a happy camper. (a free 140 mhz)

Thanks for the input so far. Feel free to comment further.
 
I'm glad your getting good results. This is what O/C'ing is all about, Mhz for nothing and your chicks for free (I think?!).

😀
 
hey man! welcome to the AHYA club. i went banas to get my 1.4 up to 1523 with PC133 memeory 🙂 but soon it will be replaced with a nice 1.6a and a kick arse P4S533 🙂
 
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