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View Full Version : Prescott Overclocking - its not all bad :-)


Superfly
04-13-05, 10:46 AM
I have a 3.0Ghz Prescott on the Intel 865PE chipset and use Crucial Ballistix DDR400 memory.

amazingly this system will boot without issue into windows and run Prime95 without issue running @ FSB 1000 DDR500 (2.5-2-2-5) 3.74Ghz!! - air cooled with Zalman7700alcu. Annoyingly D3 is the only app that does'nt like those clocks (oh well).

3.4Ghz is very stable and still seems to be my sweet spot so I have settled here. The most impressive thing is the memory timings and speeds - I love my Ballistix :-)

Just wanted to share this with the group really - no reason other than to say yay it works!!

mustrum
04-13-05, 10:59 AM
The prescott is not bad but then again almost any 3000+ can be OCed to a point where it beats a P4EE @ 4Ghz while costing 120 bucks.

Optimummind
04-13-05, 12:13 PM
I have a 3.0Ghz Prescott on the Intel 865PE chipset and use Crucial Ballistix DDR400 memory.

amazingly this system will boot without issue into windows and run Prime95 without issue running @ FSB 1000 DDR500 (2.5-2-2-5) 3.74Ghz!! - air cooled with Zalman7700alcu. Annoyingly D3 is the only app that does'nt like those clocks (oh well).

3.4Ghz is very stable and still seems to be my sweet spot so I have settled here. The most impressive thing is the memory timings and speeds - I love my Ballistix :-)

Just wanted to share this with the group really - no reason other than to say yay it works!!

Yea, I like my Intel proc too. I need to buy some better overclocker RAM though before I can take my Prescott to higher speeds. Probably some PC4000 RAM.

darkrider01
04-13-05, 12:33 PM
My sig shows a decent Prescott overclock, but my RAM (mismatched PC2700) is really holding me back. Last night I ordered some fancy new Patriot DDR2-PC5600 (700MHz) and I'm hoping it'll take me to the upper reaches of the high 3+ GHz range. I love that Newegg. 1GB (2x512MB) of Patriot PC5600 is only $229. Fastest RAM I've seen anywhere and has pretty nice timings too. Nice to see RAM coming down again. DDR3 must be a couple weeks away.(throwpc)

1337_Like_ThaT
04-15-05, 08:23 PM
A buddy of mine owns the exact processor SuperFly has, but running on an Abit 865 max II with Corsair XMS XLL 2-2-2-5, and when running aggressive timings, he can hit 4.0ghz stable. All being cooled with a SP-94 & 92mm Tornado Fan. Presscott give very impressive OC's IMO, regardless of their heating issues.

JoKeRr
04-15-05, 08:29 PM
yea, the prescott C0 was crappy overclockers, D0 was better, and E0 (socket 478) often hit close to 4 ghz, but it's hot, even for me in Canada.

I just grabbed 2 30 capper northwood 3.0C, will see how they fair out with my XP-90. I'm still deciding which ram I should keep: Corsair PC3500C2 BH5 or OCZ PC3700 EL Platinum Tccd?? I guess it'll depend on how high I can clock those.

Edit:

1337, that's a lot of Vcore you've pumped into your Northwood 3.4ghz man.

1337_Like_ThaT
04-15-05, 09:03 PM
yea, the prescott C0 was crappy overclockers, D0 was better, and E0 (socket 478) often hit close to 4 ghz, but it's hot, even for me in Canada.

I just grabbed 2 30 capper northwood 3.0C, will see how they fair out with my XP-90. I'm still deciding which ram I should keep: Corsair PC3500C2 BH5 or OCZ PC3700 EL Platinum Tccd?? I guess it'll depend on how high I can clock those.

Edit:

1337, that's a lot of Vcore you've pumped into your Northwood 3.4ghz man.

Ya, I know my Vcore is insane, but I upgraded from a 3.0c to my current 3.4c specifically to take the chip to the max, seeing what it can handle on air. I don't mind if I kill the chip, I was doing that to my previous 3.0c. I had that @1.725v until it little by little coulnd't handle such high frequencies. It would eventualy only be able to run stable @ 3.6ghz (1.70v) or anything less than that. Until I upgrade my setup completely, I'll be sticking to northwoods for now :) I really want to get a DangerDen Watercooling setup, and try to run my chip at 4ghz with a lower vCore. We'll see what happens, $400 later LOL

jAkUp
04-15-05, 11:44 PM
I used to run my 3.0 at 3.75 24/7. Never had any issues. I was also pumping 1.75v into that badboy :) What a fighter that chip was. hehe

Prescotts overclock well for the most part, as long as you can keep them cool. They run hotter than hell.

rohit
04-16-05, 02:47 AM
I Smell Fire..

I used to run 2.8e @ 3.4 initially, wen the temps touched 73 and it started throtlling, rebooting. after that even at 2.8 ghz, its temps were above 65*C. & fan speed was insanely high, 5500+ rpm. so it was time to say "GOODBYE"

Lars
04-16-05, 05:58 AM
Guys, you should try out some of the new 6xx series Prescott's.... I've just put together a SFF (XPC) system from some parts I had lieing around, and decided to try out a Shuttle with 915G chipset (because I had 2x PC3200 blocks doing nothing). Even in the SB81P model with no pci or pci-e locks, the cpu P4 640 (3.2 Ghz) runs 4 Ghz easily @ default voltage, and @ 1.4V I'm doing almost 4.2 Ghz.... in a Shuttle, with the heatpipe cooler and everything... :eek: :D

Now the chipset is the culprit for taking the system any further than 260 Mhz fsb, but the cpu is smoking, and not from heat either. When I crank up the speed of the fans I can get idle temps down to 38C and keep full load @ 55C... That's with a 1 Ghz overclock....on a notoriously bad overclocking chipset..... in a Shuttle..... I love it :D

Whenever I decide to upgrade my main system, I'm going to have to give this cpu a go in the Mach II GT :p

JoKeRr
04-16-05, 03:48 PM
I picked up 2 30 capper 3.0Cs, one of them is SL6WK and the other is SL6WU. the WU should be a good OCer b/c the default Vcore is suppose to be like 1.475V cause the CPU is actually made for DTR laptops, I'll see how high I can crank those puppies. I'm getting a XP90 for cooling.

superklye
04-16-05, 04:00 PM
Guys, you should try out some of the new 6xx series Prescott's.... I've just put together a SFF (XPC) system from some parts I had lieing around, and decided to try out a Shuttle with 915G chipset (because I had 2x PC3200 blocks doing nothing). Even in the SB81P model with no pci or pci-e locks, the cpu P4 640 (3.2 Ghz) runs 4 Ghz easily @ default voltage, and @ 1.4V I'm doing almost 4.2 Ghz.... in a Shuttle, with the heatpipe cooler and everything... :eek: :D

Now the chipset is the culprit for taking the system any further than 260 Mhz fsb, but the cpu is smoking, and not from heat either. When I crank up the speed of the fans I can get idle temps down to 38C and keep full load @ 55C... That's with a 1 Ghz overclock....on a notoriously bad overclocking chipset..... in a Shuttle..... I love it :D

Whenever I decide to upgrade my main system, I'm going to have to give this cpu a go in the Mach II GT :p
That is pretty crazy man...but wow, is it awesome. :)

lostlilchild66
04-16-05, 04:17 PM
I have a 3.0Ghz Prescott on the Intel 865PE chipset and use Crucial Ballistix DDR400 memory.

amazingly this system will boot without issue into windows and run Prime95 without issue running @ FSB 1000 DDR500 (2.5-2-2-5) 3.74Ghz!! - air cooled with Zalman7700alcu. Annoyingly D3 is the only app that does'nt like those clocks (oh well).

3.4Ghz is very stable and still seems to be my sweet spot so I have settled here. The most impressive thing is the memory timings and speeds - I love my Ballistix :-)

Just wanted to share this with the group really - no reason other than to say yay it works!!


Yeah, that's pretty good ram, and that's one of the great things about TCCD.. high clock speeds, good timings and not a ton of voltage.

When I had my 3500+,I ran my 4 sticks of Corsair TCCD @ 520Mhz 2.5-2-3-6. I was, however, forced to run 2T, and that cost me alot of performance unfortunately :(

lostlilchild66
04-16-05, 04:19 PM
I used to run my 3.0 at 3.75 24/7. Never had any issues. I was also pumping 1.75v into that badboy :) What a fighter that chip was. hehe

Prescotts overclock well for the most part, as long as you can keep them cool. They run hotter than hell.


I was contemplating getting a prescott 3.4 instead of my Northwood 3.4. But in the end I chose the northwood. Even though I have good cooling, I didn't want to even imagine what kinds of temperatures I'd get from a prescott @ 4.2+ GHz with like 1.7V or something :P

Lars
04-17-05, 01:57 AM
That is pretty crazy man...but wow, is it awesome. :)

Thanks. I did not think it would be possible to overclock the 640 this much at all, especially not in a Shuttle. It does ~4.2 Ghz @ 1.36V..... I also have an older Prescott system (s. 478 3.2@3.6 @ 1.42V in Abit IC7-G), and that does get hotter than hell, even with a XP120 cooler.

Here are a few links to some benchmark results with the Shuttle system just to prove I'm not full of BS ;) PCMark04 6468 (http://service.futuremark.com/compare?pcm04=2912681) and 3dmark2001se 26569 (http://service.futuremark.com/compare?2k1=8529079)

Superfly
04-17-05, 01:58 AM
Yeah, that's pretty good ram, and that's one of the great things about TCCD.. high clock speeds, good timings and not a ton of voltage.

When I had my 3500+,I ran my 4 sticks of Corsair TCCD @ 520Mhz 2.5-2-3-6. I was, however, forced to run 2T, and that cost me alot of performance unfortunately :(

yeh 1T all the way dude!!! also Crucial RAM is manufactured from Micron chips - not TCCD.

just a FYI

1337_Like_ThaT
04-17-05, 06:55 PM
I was contemplating getting a prescott 3.4 instead of my Northwood 3.4. But in the end I chose the northwood. Even though I have good cooling, I didn't want to even imagine what kinds of temperatures I'd get from a prescott @ 4.2+ GHz with like 1.7V or something :P

Go0d choice huggs, go0d choice.......Operating a PreshoTT @ 4.2ghz with high vCore would definately suck, unless you have an ubber 1337 cooling system :)

JoKeRr
04-17-05, 08:42 PM
yea prescott with 1.7V, yikes man. u need a water cooling with at least 2 120mm deltas to cool that puppy--remember: heat output (current leaked) is proportional to increase in voltage exponentially

therefore: +Voltage = +(Wattage)^2

bkswaney
04-17-05, 10:13 PM
1.7 on a PS puts out some major heat.
There is no way I would run one
that high even on water.

Just my 2 cents. ;)

red_star
04-18-05, 10:35 PM
And i'm just satisfied with my stock speed. Prescot 3.4 D0 here :) This little baby doesn't run hotter than 48C with custom made air cooler.

Dispraiser
05-04-05, 02:31 PM
I really hate to do this, but I'm gonna have to ask... I've got a 2.8 GhZ Prescott, and I knew when I bought them thry run hot. Is there any newbie guide to overclocking? I'm not looking to hit insanly high speeds, I'd be happy with 3 or 3.2 ghz, even. I have an Asus P5DG1 motherboard, and one 512 MB DDR 400 Corsair RAM.

Superfly
05-04-05, 03:00 PM
im not aware of a guide - im sure there is one its just that I've never looked.

try Tweakguides (http://www.tweakguides.com)

or just google "overclocking the prescott P4"

best of British m8.

Dispraiser
05-04-05, 10:05 PM
Heh, I did, that's how I got here.

darkrider01
05-04-05, 11:28 PM
I don't get it......is 32*C (89*F) a hot processor? That's what my temps say at stock speed with stock cooling. CPU fan is at 2600+/- RPMs. I do have a well ventilated case, but I still don't think they run as hot as everyone says. I don't remember for sure, but when I oc'd to 3.3+GHz, I didn't see more than 100-105*F temps. That's not that big of a difference. Maybe I just have a "good one"..... :confused: