P4 2.8 higest possible overclock

fhorst · 12-12-2003, 07:40 PM

I was wondering what the highest stable OC for a P4 2.8 would be.
3.5ghz (@250fsb) or 3640 (@260fsb) is no problem,

When I want to go higher, I need to raise my voltage a lot (1.8v and up)

I’m a bit afraid with the high voltages, I might fry my CPU.
My system is water-cooled, with a WW cool block, and enough radiators to dissipate any heat.
I won’t use pelt’s.

Till what voltage is it “save” to go? (I won’t sue you

just real life setups will do)

Levish · 12-15-2003, 03:31 PM

1.70-1.75 is the maximum reccommended voltage i've seen before Northwood Sudden Death Syndrom becomes a issue

I think you should look at removing the integrated heat spreader if you'd like to maximize your overclock

Avg. overclocks on the overclockers.com db is 3.5-3.6 ghz with anything from vapo to air ...

fhorst · 12-15-2003, 04:53 PM

OK, thank you for your input. Stay below the 1.75.

I'll try to get me one of the Z5 stepping, to see if that one brings me (even) better results

3780 max ain't bad at all... (with heat spreader still on)

Blackeagle · 12-15-2003, 09:04 PM

That looks like a pretty good O/C already.

What RAM and what timings + voltage are you making use of? 260 is a impressive fsb, at least to me.

Would you please post the MB used and the cooling on the NB?

Could you also spec the rest of your watercooling loop? Perhaps there is some optimisation still possible to aid your cooling.

More is never enough, eh?

fhorst · 12-16-2003, 12:13 AM

Hmmmm, did not know that is was that impressive....

Anyway This is how things look like now. I made me a coolerbox.
It's got 7 120mm fans and 3 80mm fans. At "full speed" things sound like a tornado, but it keeps it also cool.
I have the WW for CPU, the DD Z block for my 875 and a Innovatec for my GPU. My hard drives are cooled with the HDD cooler from Koolance (2x) Pumps are 2x the Hydor L20.

I bought me 3 months ago a P4 2.8/800fsb, apair of Kingston Hyperx 4000 (2 x 512 MB) and the Abit IC7-Max3 Mobo.
Hooked it up with watercooling (first the Corsair Hydrocool, then an asetek Waterchill setup, and after that several setups with my my current hardware) and set it at 250 FSB, getting me a nice 3.5 Gig. (never even tried to run it slower)

As I need to ajust CPU voltages e.g. to get it nice stable at higer speeds, I run it like this (250 fsb) for daily use. And I found that my Kingston won't do anything above 257 FSB. For me that was a big downside to this memory, as I want to run at a 1:1 setup.
I'm getting me a pair of OCZ 1gb PC4200 Dual Ch. EL-DDR.
What will run faster? 2 x 512 or 4 times 256?

So first I never was thinking about pushing it more.

Then I was reading about the 4:5 devider, and ppl getting 300 FSB..., that sounds nice! So I started playing, and at 1.8v I can get stable into windows... But I did not try to stress it... As I was thinking that I could fry my CPU.

265 is stable without problems, exept my temps go up.

(with my current setup @ 250 fsb I can shut the fans down, and run it like that @ normal office use. With only 2 x 120mm @ 7v I can run it stessed (SETI) without problems 24/7.

This is how I want things to look in the near future.
I got me 6 x a Koolance P100 block (only 11mm high) and I'll be using those to cool the Southbridge, Mosfets, PSU and the backside of my CPU.

I need an extra small pump to push the Koolance loop. This might be the Mi mouse, or might be getting me a Koolance case (901) and modify it. I'm having problems to get my blower silent (it's from a car dump) It is at first, but running it 3 days at 4 or 5v, i get a pitchy sound... I guess the thing ain't ment to run at that low speeds, hanging "upside down".

I'll keep you guys posted when all my gear get's here, and I have it hooked up. Then i know that my higest possible OC is at low noise!

Levish · 12-16-2003, 10:50 AM

you might want to just look at vapor/phase change cooling instead of all that watercooling stuff

search for prommie, prometia, vapochill

with one of those you'll get a max overclock short of L2N and the only attention the setup will need is some very good insulation against condensation

with any of those cpu temps will be sub zero C ... in combination with (really) good memory you may even be able to break 4000 mhz

MadHacker · 12-16-2003, 04:53 PM

Quote:

Originally posted by Levish
I think you should look at removing the integrated heat spreader if you'd like to maximize your overclock

Have you seen any Articles or "How-to" on removing the IHS?

fhorst · 12-16-2003, 05:46 PM

Simple, just use a razor blade, and cut gently the glue at the edges of the IHS.

If you have the Z3 or Z5 stepping, DON'T do it!
Those are attached in a different way... No way to get it lose.

fhorst · 12-16-2003, 05:54 PM

Quote:

Originally posted by Levish
you might want to just look at vapor/phase change cooling instead of all that watercooling stuff

... in combination with (really) good memory you may even be able to break 4000 mhz

A prommy will give me a good OC, but I like to play with the water...
It's more fun and more flexible.
I can not find a way to vapo my north bridge, GPU, PSU Mosfets etc.....

I just want to optimise some things. (And play with water) For me No ice or plets allowed......
Just want to find out what can and what can't be done.

And, with an optimized WC setup, I might be able to also get real close to the 4ghz....

MadHacker · 12-16-2003, 05:54 PM

Quote:

Originally posted by fhorst
Simple, just use a razor blade, and cut gently the glue at the edges of the IHS.

would i then need a CPU shim to prevent crushing the core?
is the P4 core any more fragile then P3?
is there more presure on a P4 then a P3?

Quote:

If you have the Z3 or Z5 stepping, DON'T do it!
Those are attached in a different way... No way to get it lose.

mine has a stepping of 7
at least that is what WCPUid sais.

fhorst · 12-17-2003, 12:17 AM

A stepping of 7? what is the CPU? P4 2.6, 2.6, etc? and how "old"?

a CPU shim can allways be usefull. (to be on the safe side)

crushing should not happen that fast. With most waterblocks, you use the 4 holes in the motherboard, and not a holder at the socket. This prevents the cooler from wiggling, and crushing.

Just be carefull when you screw down the bolts.

About the pressure, I'm not sure.
Normally, with IHS, it's about 10 KG. Some of that goes lost via the IHS. My best guess would be 8 to 10 KG.

Here is an article:
http://www.overclockers.com/tips1087/

cristoff · 12-19-2003, 12:14 PM

well i got my 1.6 p4 northy upto 2.64 at only 30deg cel on aircooling...

fhorst · 12-20-2003, 11:25 AM

Quite a good OC! @ a real good temp

But that's at about 1 ghz lower... And as you know, the higher the Mhz, the higer the temp!

What (air) cooling heatsink did you use?

Levish · 01-07-2004, 01:03 PM

i have 2 2.8c's i recently bought

a plain Jane D1 and a M0 stepping

both max out around 250mhz fsb with sane (1.65volts)

The D1 i removed the IHS on and it's not much cooler (based on diode temps), based on probe temps it's about 4C better. Got the D1 to 256mhz fsb but not too stable at 1.65v

I'm going to try 1.7v - 1.75v after i separate my loops

mrr · 01-21-2004, 10:58 AM

Hello
Im running my 2.8C at 3.5GHz stable 1.65V and 250 FSB
(Watercooled Full load Seti 47 Degree celsius)
1:1 Memory ratio
GEIL DDR 533 (PC4200) Memory 512MB*2 (Dual)
1:1 Memory ratio and 1.7V (Can do around 280 FSB)
Abit IC7-MAX3/FX5950 Ultra

I'd like to increase my core voltage even further..but Im scared to to that..

fhorst · 01-21-2004, 11:57 PM

Quote:

Originally Posted by mrr

Hello
Im running my 2.8C at 3.5GHz stable 1.65V and 250 FSB
(Watercooled Full load Seti 47 Degree celsius)
1:1 Memory ratio
GEIL DDR 533 (PC4200) Memory 512MB*2 (Dual)
1:1 Memory ratio and 1.7V (Can do around 280 FSB)
Abit IC7-MAX3/FX5950 Ultra

I'd like to increase my core voltage even further..but Im scared to to that..

has been posted...

fhorst · 02-01-2004, 02:45 PM

Well, this is the best I can do with the M0 (@1.7)

The D1 stepping got me about 15 Mhz further at the same voltage, with the IHS still on.
also I gould run stable @ 260 fsb with 1.675v the M0 will crash on 1.675v

I did mount the D1 with ceramique and the M0 with AS5

I was running p95 2 times at torture test, to keep my CPU occupied.

With the D1 stepping my temps where 41c with the Mo it's 39c
(on a IC7-Max3, and we all know that that motherboard gives strange temp readings)

Currenly I need to sell one of the CPU's.
What should I do? :shrug:
Keep the M0? or remove the IHS from the D1, and see what it brings me?

fhorst · 02-01-2004, 03:44 PM

I tried 1.725, but it did not give me one mhz extra....
then I booted with 260fsb @ 1.7, and it crashed!

Damm I hate this.

I'm now running safe and stable @ 250fsb /1.675v core

(same as I did with the D1)

Well, I guess I'm gonne change CPU's again. Back to the D1.
Remove the IHS and see if that will help some in my new setup.

tuxp3 · 02-01-2004, 03:55 PM

how much for the one ur selling ?? and what is the rated speed.. 2.8 ?

fhorst · 02-01-2004, 05:07 PM

LOL. yep, the rated speed is 2.8.

I payed 215 euro's for it....
I needed to build a system for a frien of mine, and it never hurts to see how that chip can perform. It will run at stock speeds in that machine

I will deliver that system this wednesday

12-12-2003, 07:40 PM	#1
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	P4 2.8 higest possible overclock I was wondering what the highest stable OC for a P4 2.8 would be. 3.5ghz (@250fsb) or 3640 (@260fsb) is no problem, When I want to go higher, I need to raise my voltage a lot (1.8v and up) I’m a bit afraid with the high voltages, I might fry my CPU. My system is water-cooled, with a WW cool block, and enough radiators to dissipate any heat. I won’t use pelt’s. Till what voltage is it “save” to go? (I won’t sue you just real life setups will do) __________________ If it get's hot, it needs to be watercooled!

12-15-2003, 03:31 PM	#2
Levish Cooling Neophyte Join Date: Nov 2003 Location: NYC Posts: 19	1.70-1.75 is the maximum reccommended voltage i've seen before Northwood Sudden Death Syndrom becomes a issue I think you should look at removing the integrated heat spreader if you'd like to maximize your overclock Avg. overclocks on the overclockers.com db is 3.5-3.6 ghz with anything from vapo to air ... __________________ 2.4c @ 274mhz fsb / Abit Ic7-Max3 / OCZ Permier PC4200 mem / Radeon 9800 Pro

12-15-2003, 04:53 PM	#3
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	OK, thank you for your input. Stay below the 1.75. I'll try to get me one of the Z5 stepping, to see if that one brings me (even) better results 3780 max ain't bad at all... (with heat spreader still on) __________________ If it get's hot, it needs to be watercooled!

12-15-2003, 09:04 PM	#4
Blackeagle Thermophile Join Date: Oct 2002 Location: U.S.A = Michigan Posts: 1,243	That looks like a pretty good O/C already. What RAM and what timings + voltage are you making use of? 260 is a impressive fsb, at least to me. Would you please post the MB used and the cooling on the NB? Could you also spec the rest of your watercooling loop? Perhaps there is some optimisation still possible to aid your cooling. More is never enough, eh? Last edited by Blackeagle; 12-15-2003 at 09:12 PM.

12-16-2003, 12:13 AM	#5
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Hmmmm, did not know that is was that impressive.... Anyway This is how things look like now. I made me a coolerbox. It's got 7 120mm fans and 3 80mm fans. At "full speed" things sound like a tornado, but it keeps it also cool. I have the WW for CPU, the DD Z block for my 875 and a Innovatec for my GPU. My hard drives are cooled with the HDD cooler from Koolance (2x) Pumps are 2x the Hydor L20. I bought me 3 months ago a P4 2.8/800fsb, apair of Kingston Hyperx 4000 (2 x 512 MB) and the Abit IC7-Max3 Mobo. Hooked it up with watercooling (first the Corsair Hydrocool, then an asetek Waterchill setup, and after that several setups with my my current hardware) and set it at 250 FSB, getting me a nice 3.5 Gig. (never even tried to run it slower) As I need to ajust CPU voltages e.g. to get it nice stable at higer speeds, I run it like this (250 fsb) for daily use. And I found that my Kingston won't do anything above 257 FSB. For me that was a big downside to this memory, as I want to run at a 1:1 setup. I'm getting me a pair of OCZ 1gb PC4200 Dual Ch. EL-DDR. What will run faster? 2 x 512 or 4 times 256? So first I never was thinking about pushing it more. Then I was reading about the 4:5 devider, and ppl getting 300 FSB..., that sounds nice! So I started playing, and at 1.8v I can get stable into windows... But I did not try to stress it... As I was thinking that I could fry my CPU. 265 is stable without problems, exept my temps go up. (with my current setup @ 250 fsb I can shut the fans down, and run it like that @ normal office use. With only 2 x 120mm @ 7v I can run it stessed (SETI) without problems 24/7. This is how I want things to look in the near future. I got me 6 x a Koolance P100 block (only 11mm high) and I'll be using those to cool the Southbridge, Mosfets, PSU and the backside of my CPU. I need an extra small pump to push the Koolance loop. This might be the Mi mouse, or might be getting me a Koolance case (901) and modify it. I'm having problems to get my blower silent (it's from a car dump) It is at first, but running it 3 days at 4 or 5v, i get a pitchy sound... I guess the thing ain't ment to run at that low speeds, hanging "upside down". I'll keep you guys posted when all my gear get's here, and I have it hooked up. Then i know that my higest possible OC is at low noise! __________________ If it get's hot, it needs to be watercooled!

12-16-2003, 10:50 AM	#6
Levish Cooling Neophyte Join Date: Nov 2003 Location: NYC Posts: 19	you might want to just look at vapor/phase change cooling instead of all that watercooling stuff search for prommie, prometia, vapochill with one of those you'll get a max overclock short of L2N and the only attention the setup will need is some very good insulation against condensation with any of those cpu temps will be sub zero C ... in combination with (really) good memory you may even be able to break 4000 mhz __________________ 2.4c @ 274mhz fsb / Abit Ic7-Max3 / OCZ Permier PC4200 mem / Radeon 9800 Pro

12-16-2003, 05:46 PM	#8
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Simple, just use a razor blade, and cut gently the glue at the edges of the IHS. If you have the Z3 or Z5 stepping, DON'T do it! Those are attached in a different way... No way to get it lose. __________________ If it get's hot, it needs to be watercooled!

12-17-2003, 12:17 AM	#11
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	A stepping of 7? what is the CPU? P4 2.6, 2.6, etc? and how "old"? a CPU shim can allways be usefull. (to be on the safe side) crushing should not happen that fast. With most waterblocks, you use the 4 holes in the motherboard, and not a holder at the socket. This prevents the cooler from wiggling, and crushing. Just be carefull when you screw down the bolts. About the pressure, I'm not sure. Normally, with IHS, it's about 10 KG. Some of that goes lost via the IHS. My best guess would be 8 to 10 KG. Here is an article: http://www.overclockers.com/tips1087/ __________________ If it get's hot, it needs to be watercooled!

12-19-2003, 12:14 PM	#12
cristoff Cooling Savant Join Date: Mar 2002 Location: Mass Posts: 185	well i got my 1.6 p4 northy upto 2.64 at only 30deg cel on aircooling... __________________ fr33t3chi3

12-20-2003, 11:25 AM	#13
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Quite a good OC! @ a real good temp But that's at about 1 ghz lower... And as you know, the higher the Mhz, the higer the temp! What (air) cooling heatsink did you use? __________________ If it get's hot, it needs to be watercooled!

01-07-2004, 01:03 PM	#14
Levish Cooling Neophyte Join Date: Nov 2003 Location: NYC Posts: 19	i have 2 2.8c's i recently bought a plain Jane D1 and a M0 stepping both max out around 250mhz fsb with sane (1.65volts) The D1 i removed the IHS on and it's not much cooler (based on diode temps), based on probe temps it's about 4C better. Got the D1 to 256mhz fsb but not too stable at 1.65v I'm going to try 1.7v - 1.75v after i separate my loops __________________ 2.4c @ 274mhz fsb / Abit Ic7-Max3 / OCZ Permier PC4200 mem / Radeon 9800 Pro

01-21-2004, 10:58 AM	#15
mrr Cooling Neophyte Join Date: Jan 2004 Location: Sweden Posts: 1	Hello Im running my 2.8C at 3.5GHz stable 1.65V and 250 FSB (Watercooled Full load Seti 47 Degree celsius) 1:1 Memory ratio GEIL DDR 533 (PC4200) Memory 512MB*2 (Dual) 1:1 Memory ratio and 1.7V (Can do around 280 FSB) Abit IC7-MAX3/FX5950 Ultra I'd like to increase my core voltage even further..but Im scared to to that..

02-01-2004, 02:45 PM	#17
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Sl6Z5 Well, this is the best I can do with the M0 (@1.7) The D1 stepping got me about 15 Mhz further at the same voltage, with the IHS still on. also I gould run stable @ 260 fsb with 1.675v the M0 will crash on 1.675v I did mount the D1 with ceramique and the M0 with AS5 I was running p95 2 times at torture test, to keep my CPU occupied. With the D1 stepping my temps where 41c with the Mo it's 39c (on a IC7-Max3, and we all know that that motherboard gives strange temp readings) Currenly I need to sell one of the CPU's. What should I do? :shrug: Keep the M0? or remove the IHS from the D1, and see what it brings me? __________________ If it get's hot, it needs to be watercooled!

02-01-2004, 03:44 PM	#18
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	I tried 1.725, but it did not give me one mhz extra.... then I booted with 260fsb @ 1.7, and it crashed! Damm I hate this. I'm now running safe and stable @ 250fsb /1.675v core (same as I did with the D1) Well, I guess I'm gonne change CPU's again. Back to the D1. Remove the IHS and see if that will help some in my new setup. __________________ If it get's hot, it needs to be watercooled!

02-01-2004, 03:55 PM	#19
tuxp3 Cooling Neophyte Join Date: Dec 2003 Location: NY Posts: 19	how much for the one ur selling ?? and what is the rated speed.. 2.8 ?

02-01-2004, 05:07 PM	#20
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	LOL. yep, the rated speed is 2.8. I payed 215 euro's for it.... I needed to build a system for a frien of mine, and it never hurts to see how that chip can perform. It will run at stock speeds in that machine I will deliver that system this wednesday __________________ If it get's hot, it needs to be watercooled!

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