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Need Help Getting To 4.0

post #1 of 9
Thread Starter 
As you can see by my specs. i have a Intel Prescott 3.20E & a ASUS P4P800-E Deluxe Motherboard.I can get my cpu to overclock to a 3.81,but when i try to clock it to a 4.0 ,it wants to dump my memory or harddrive.Very unstable.Can anyone help me with the vcore & memory setting & or with any other setting i might need to adjust.
post #2 of 9
first ?, have you locked the pci / agp frequencies ? if not do so
2-nd try raising your vcore a litle bit at a time until your system is stable
1.5 V is the max vcore for a prescott and 1.7 for a northwood .
Also try using a ram divider or loosen the timings
Important : MAX temp for prescott is 65C and for nothwood 55C
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post #3 of 9
What is your memory running at? To get to 4000MHz, you'll need 16x250fsb = 4000, so get a 2:3 divider on your ram at the least (166:250 = 2:3).

Second, I take it you're on stock cooling? I think you're going to hit some pretty high temperatures before you get to 4.0; you should decide if better cooling is needed...
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post #4 of 9
Thread Starter 
Stock ram is running at 2.5,4,4,8,8. & my cpu cooler is a Gigabyte G-Power PRO.
post #5 of 9
My guess why you can't hit 4.0
1-Prescott Socket 478 need more than 450W to hit the 4.0 from 3.2 maybe?
2-Water cooling perhaps, as they were the ones that got Pentium famous for running hot. But those days are over.

Or maybe you need to set timings to 3-4-4-8 and depending on how the RAM reacts at 2.9Vdimm, or just do a 4:3 ratio, after all you're running an 800mhz FSB cpu with DDR333, not a great combo IMO, it should've been DDR400.

If 3.8ghz is the max? Then that could be the possibility.
post #6 of 9
Thread Starter 
Nasgul, the ram setting u gave me worked, 4.0, it seems to be stable. Temps. running 40c & under load 50c.Still going to go back to 3.80,til i get a watercooler.Thank you for your help,Also do u know of a free stess tester?
post #7 of 9
ya check on the forum somewhere there is

occt
prime 95 for final test
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post #8 of 9
in intel cpu section

look for the overclocking guide its on the three first thread down a little and there is prime 95

for occt i guess go search it on google.
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post #9 of 9
Quote:
Originally Posted by AMOCO
Nasgul, the ram setting u gave me worked, 4.0, it seems to be stable. Temps. running 40c & under load 50c.Still going to go back to 3.80,til i get a watercooler.Thank you for your help,Also do u know of a free stess tester?
Beautiful!.

50C under full load is excellent, run PCMark05 and watch temps rise, if during the bechmark becomes unstable than you may need to set the temps to go higher in the PCProbe, mine were at 60c and back when I had the Zalman cnps7700cu the temps went upto 67c which I thought "unstable, s.o.b." but set temps in PCProbe to go as high as 70c and it finished the bechmark.

I was thinking in going Water but honestly I'm cheap so I won't be getting the Swiftech $260 WC kit I wanted, instead I gave the Tuniq Tower 120 a shot and my highest temps were 45c during PCMark05, so for $60 not bad. I still have the itch to buy the Swiftech WC Kit but when I think of the price tag, I run and hide. Should definitely try the Tuniq Tower 120, it could make the system stable just in case.
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