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-   -   Overclocking the P4 Prescott (https://www.madshrimps.be/vbulletin/f6/overclocking-p4-prescott-5382/)

Gamer 8th June 2004 16:44

Quote:

Originally posted by Liquid3D
Really nice overclock, I knew these chips had it in them. Your PWM temps don't seem too bad either. How high did they get when running 3D applications?
got a clean 4.3 ghz 3D01 run, but didn't look @ the temps.

sorry.

kristos 9th June 2004 18:08

when you say the northwood got to 3.6 gig, is that rockstable or the max overclock that let you boot into windows or post or ... ?

Gamer 17th July 2004 18:38

max oc stable, but I'm using it on 3.5ghz for daily use.

Sidney 17th July 2004 18:52

Gamer; I have been running the 2.8E at 3.5 daily since Feb. air cooling with Phoenix 70 (radial fin) and CV on P4P800 Deluxe. Idle 42C and tops 57C at 22-23C room temp. I have to add NB fan otherwise it won't go over 245FSB.;)


Gamer 17th July 2004 19:30

the last procs are running a lot cooler it seems, looks like Intel did his homework.

nice temps, fine cooler it seems.

Liquid3D 17th July 2004 23:01

From day one I was in complete diagreement these chips run any warmer then most. In fact my A64 3400 runs a lot warmer then my prescott. I love my 3.0E, and although there's now the 775-LGA version, we have sopme time to go before PCI-express matures. I'm running some Kingston KHX3200K2/2G at 250FSB, and having a great ole Prescott time.

Gamer 17th July 2004 23:26

nice bandwith, only I'm scoring the same with my Northwood :)

and, what are you doing with 2 gb of ram ? :)

Liquid3D 18th July 2004 00:26

Well I've only pushed the memory 1:1, as I'm testing for a review, but here's 250FSB benchmarks and temps. And I'm going to use the divider and try some CPU MHz overclocking on the old Prescott.

I've had this cpu to to 4010MHz, but I've dumped all my high-speed memory. I was supposed to get some PC4800 from OCZ, but haven't yet. Anyway, here's the 250FSB 2GB-kit of Hyper-X.

By the way, until someone works on disabling the D-VID feature on Prescott overclocking is going to be very difficult. You simply can't thow large amounts of voltage at it or two things happen. First; "...reverse current may flow into the AC-DC
regulator’s input filter, potentially charging the input filter to a voltage above the over voltage
value. Upon detection of this condition, the AC-DC regulator will react by shutting down the ACDC
regulator supply voltage.
"
I believe this is what frys the motherboard power circuitry.

Second; Prescott, based oin it's D-VID feature works best with Vcore set to "Auto". Eeven manually setting the minmum Vcore will cuase problems. IF your going to overclock, and reach the point where you need to boost Vcore, try to remain under 1.450V.
As an experiement, try overclocking the processor at 1.600V, and try the same overclock at 1.525V . You'll get a more stable OC with the lower voltage. Another thing is if you can't disbale the Power Montior, make sure to raise the Thermal Clock Throttling to 87% for high frequencies. Okie dokie, I'll be back after I try some high frequency OCing.


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