[dragonhunter]

Hi all,

How do I know if a P4 3.4ghz is a Prescott or Northwood?
Which one of the CPU is better?

Thanks

[Flakk]

u will know the difference because the prescott has 1mb of cache while the northwood has only 512kb.

northwood is better.

[Captain Newbie]

Sig link.

Generally the Prescott is better for cache-intensive operations, but runs way warm.

[The O.C]

i would stay away from prescotts if you're just air cooling.

[Cerberus2k7]

Prescotts also cause a lot of stress on your mobo.

[Sjaak]

Put your finger on it when stressed. Examine your finger after 2 seconds:

- 2nd degree burns: Northwood
- 3rd degree burns: prescott



Clock for clock on 3.4ghz it will be very tight, depending on the apps you use. When you clock higher the prescott will take the lead.

[brint]

Prescott is defiantly not for the novice overclocker. You have to use water cooling on it to get somewere. Just like Captain Newbie and Sjaak said, Prescott runs very hot.
My 2.8@3.5 prescott has a full load temp at around 68c. And I have a 2.5 - 3liter water cooling system. But again, the Prescott performs extremely well! I have nothing to complain about. Only the price$$$.
So if you just plan to use air cooling and you want to overclock all the way, I would recommend a 3Ghz Northwood-C. From what I have heard, they can overclock a great deal just using good air cooling.

[trueplaya4ever8]

Originally Posted by The O.C

i would stay away from prescotts if you're just air cooling.

i agree here

[makaka]

yeah stay away from the Prescott it s run very hot
it s not recommanded for overclock

[dragonhunter]

thanks for replying you guys,

According to you guys, I have 3.4 ghz Northwood. I overclock to 3.62 ghz @ fsb of 213. It idle @ 39c and full load @ 59c w/ Zalman HS.
Is this normal for temp??? can I overclock higher?

Thanks

[Lan_Of_Malkier]

Higher O/C would require either an SP-94, or a water-cool most likely. I get 26°-28° Folding load on a 2.8c @ 3378 with the SP-94 and a strategicaly ventilated Antec Server Tower.

[Shuzzy]

Originally Posted by Lan_Of_Malkier

Higher O/C would require either an SP-94, or a water-cool most likely. I get 26°-28° Folding load on a 2.8c @ 3378 with the SP-94 and a strategicaly ventilated Antec Server Tower.

nice temps. i've got my 3.0c at 3.75 and i get like 40c load temps. which suits me fine. although a new antec p160 case is in my future plans, which i will modify to get better case temps. also thinkin bout sp-94, buy the looks of everyone else's results prolly would'nt be a bad idea. Im in no hurry though, this cm jet4 hsf performs fairly well, my idle temps don't budge from 28c.

[Lan_Of_Malkier]

That looks like a really nice case. Aluminum and all. You should see some good results. That SP-94 was the best $50 I have spent in a while. My temps are due to the fact that I have my office in my basement (half level) so it stays relatively cool. Ive got 1 80mm smart fan and one TT 80mm in front blowing across my 7200rpm WDs (not much heat there), one of the two rear 80mm fans going and an 80mm side panel feeding fresh cool air to the cpu and memory. It also helps that my Video card is an nVida MX440. Not TOO much heat there, though it is oc'd.

[Dcasole]

There is hope for cooling a prescott with air.

The popular notion is that you cannot cool a prescott with air is really incorrect as there are several people , including me who are.

The problem is we all just thought we could plug in a prescott and everything would be fine which is what I did and low and behold I had idle temps of 60C and load temps over 70C. I also did not realize what a " Power Hog " it was .

I did some reaserch and found out that Intel specificly states that you must have a " Thermally Advantaged Chassis" in order to run a prescott.
(read the attached link)
http://support.intel.com/support/pro.../CS-008537.htm

I also found out that my power supply was not up to the task

I did not want to go the " water" cooling route so in the end I made this simple mod to my case(just added a duct) and changed out my power supply.

My prescott now runs (overclocked to 3.59) at 42C at idle and 55C under a load using the stock heatsink and fan. These temps are better than most people are getting with water. I plan on buying an SP-94 as I would like to get the temps in the thirties which I think is a possiblity

Like any new product that comes out I think there is a learning curve that goes with it. { We cannot forget the original P4's and all the complaints right)

Just my two cents

Dave

[aaroncat]

Dragonhunter - You can download the program cpu-Z which will give you information on your current processor, including codename and more than most can comprehend.

http://www.cpuid.com/cpuz.php

[ozzlo]

Originally Posted by Dcasole

There is hope for cooling a prescott with air.

The popular notion is that you cannot cool a prescott with air is really incorrect as there are several people , including me who are.

The problem is we all just thought we could plug in a prescott and everything would be fine which is what I did and low and behold I had idle temps of 60C and load temps over 70C. I also did not realize what a " Power Hog " it was .

I did some reaserch and found out that Intel specificly states that you must have a " Thermally Advantaged Chassis" in order to run a prescott.
(read the attached link)
http://support.intel.com/support/pro.../CS-008537.htm

I also found out that my power supply was not up to the task

I did not want to go the " water" cooling route so in the end I made this simple mod to my case(just added a duct) and changed out my power supply.

My prescott now runs (overclocked to 3.59) at 42C at idle and 55C under a load using the stock heatsink and fan. These temps are better than most people are getting with water. I plan on buying an SP-94 as I would like to get the temps in the thirties which I think is a possiblity

Like any new product that comes out I think there is a learning curve that goes with it. { We cannot forget the original P4's and all the complaints right)

Just my two cents

Dave

I totally agree with that, the prescotts run around 115-125 watts at stock and a northwood runs about 95 watts stock at 3.4ghz. Just get an sp-94 heatpipe and a 92mm tornado and you will easilly tame the beast.

i think the sp-94 has a c/W rating of 13 so for every 13 watts of heat the processor will be 1 c above room temprature. so a little math shows that it would be about 10c above room temprature.

I have a copper core alliuminum heatsync and a 80mm tornado and it runs at about 35c-40c for cooling my 2.8 @ 3.2 i coulden't see a prescott running any more than 4-6c hotter in my system.

[Sjaak]

i think the sp-94 has a c/W rating of 13 so for every 13 watts of heat the processor will be 1 c above room temprature. so a little math shows that it would be about 10c above room temprature.

Its the other way round. For every watt, the cpu becomes .13 degrees above ambient.

1/.13 = ~8, so about 8 watts per degree above ambient

[brint]

Dcasole, how much air cooling have you added to your case?

[Dcasole]

brint, I have one 80MM fan in the front of my case , One 80MM in the back , the two that are in my power supply and one that I mounted on the side panel in the duct that was recommended by Intel. It was this side fan directed right at the CPU that drove my temps down to a level that I was happy with.

Here is a picture of the mod although its not pretty it works.........

http://server6.uploadit.org/files/Dcasole-DSC01133.JPG
http://server6.uploadit.org/files/Dcasole-DSC01132.JPG

Dave

[Klowno]

One thing when comparing temps, we have to remember
that mobos of different brands calculate the temps differently too.

An asus 875 board is some 15c (think it was, have to find the link)
cooler than msi's 875, well not actually cooler but it just reads the temps as they were cooler.