P4 "Prescott" Overclock

[hIgI]

Tell me something about my OC, could I increase it?

I'm watercooling.

 

[Scout]

That's a pretty sweet overclock! I see you've upped the voltage some, are you having any problems with heat with your watercooling? What's your temps?

Have you checked for processor throttling? Run Throttlewatch to make sure you aren't digging fools gold at these speeds (CPU throttling so the performance really isn't there)

 

[luminaris]

If your watercooling, then yes, you should be able to go higher. That's a good result so far. As long as the temps stay within limits, your good to go.

http://photobucket.com/albums/f16/Luminaris/?action=view&current=PrescottOC3.jpg

 

[WINDSHEAR]

why is the multiplier only 14 if it is a 3.4Ghz processor? My 3.0Ghz 530J I'm on right now has a multiplier of 15... A 3.4Ghz proc should have a multiplier of 17.

 

[samsonite]

http://www.compymcputer.com/uploads/1892895731.jpg

im havin the same issue im pretty sure i should be gettin higher but the highest i can get is 4055.4ghz. is there any thing i can do? im on watercooling and my mobo is an ASUS P4P800S-E.

 

[vtPelt]

a lot of 478 P4 3.0e top out at around 4.0 ~ 4.2 Ghz. I top out at 4.01 @ 1.525v. I just sinked my mosfets and will try a higher voltage. Check the CPU voltage, ASUS is known for having a huge droop, that maybe the cause of instability or inability to increase your clock speed. NOTE!!! Prescotts suck A LOT of power and your mosfets will burn if not properly cooled.

 

[orionman]

NOTE!!! Prescotts suck A LOT of power and your mosfets will burn if not properly cooled.

What are the mosfets?

thx

 

[orionman]

Thx, how important is it? to properly cool them with a Prescott?

 

[WINDSHEAR]

Thx, how important is it? to properly cool them with a Prescott?

if the HSF is properly seated, P4's do not suffer from heat problems. At 4.2Ghz you are probably ok, if you aren't suffering from overheating. What temps are you at right now?

Find the temps first,... and if they are low, you should be able to go further on whatever cooler you got.

 

[orionman]

55C when under heavy load with Prime95
but after few hours of BF2 or oblivion, I've never seen it over 45C

My room temperature is ALWAYS below 20C

 

[orionman]

My P4 doesn't boot at 4.3
It would need a voltage increase, but I don't know the safe range for voltage on a Prescott...

 

[WINDSHEAR]

well, if voltage is at 1.3... then I think the limit is 1.45 or 1.55 or something... just try a voltage of 1.35 for now.

 

[orionman]

The stock voltage is 1.4
uhuh

 

[WINDSHEAR]

then you have an older Rev, likely C1 or something, (I have E0, and it's stock voltage is 1.3).

Anyways, the max voltage is likely 1.6 then, but I wouldn't go that high. 1.5 is the most I would do on that. Just up it to 1.45 volts and try 4.3Ghz and see if it works.

 

[orionman]

thx!
cpu-z for my prescott:
Family F
Ext. Family 0
Model 4
Ext. Model 0
Stepping 3
Revision N0


voltage is at 1.3 when running at 2.8 and 1.4 when running at 3.4
changing the multipliers depending on the system load...

 

[WINDSHEAR]

ok so you have SpeedStep then? (aka EIST), if so disable it, if you can, and upping the voltage to 1.45 is worth a try, 1.5 is probably safe to try too, just remember to watch the temps, especially after increasing voltage.

oh, and you have a newer/different type processor than I do. You have N0 revision. Mine is E0. Yours is either of the 6xx series (mine is 530J), or you have a newer revision of the same type of processor as mine (530).

 

[orionman]

650
in my signature


Thx for the info!
appreciated

 

[WINDSHEAR]

I don't know if the revision changes from model number to model number,... or if it is only a revision in the processor itself regardless of model number.

 

[samsonite]

is there a program i can use to change the voltage with out goin through the bios lol im lazy lol

 

[WINDSHEAR]

do it thru the BIOS... otherwise you'll have to do it every time you start the friggin computer.

 

[AlexKidd]

Can anybody help me with my overclocking? I hav a Prescott 640 Pentium 4 3.2Mhz Processor. I cant get the FSB past 223mhz. I dont think its the memory as im running it at 1:1 and its DDR2-533mhz. Any ideas?

 

[powerbaselx]

Can anybody help me with my overclocking? I hav a Prescott 640 Pentium 4 3.2Mhz Processor. I cant get the FSB past 223mhz. I dont think its the memory as im running it at 1:1 and its DDR2-533mhz. Any ideas?

Lack of power? PDU low wattage?
Type of RAM? Does the memory modules have heatsinks?
Overheat due to CPU low heat dissipation?
Not enough voltage? (read posts above)

.- Luis Duarte
- - -
Pentium 530@3750MHz OC
Asus P5GDC Deluxe
2x512MB CL2.0 Patriot
2xWDC 80GB SE
Asus EN6600GT 128MB 530/1050MHz OC
350Watts PDU
Simple airflowing, no Watercooling

 

[AlexKidd]

After quite a few hours of reading on the web i came across a guy who put up his pci-e from 100mhz to 118mhz. I increased mine to 110mhz. I can now increase FSB to 225mhz no probs. So now my Prescott runs at 3.6Ghz. How much more could i get from my 3.2ghz Prescott? I don't wanna keep upping it till it f**ks. The temps when overclocked are 35 idel - 47 load. Stock heatsink/fan.