My little guide to Mobile Pentium 4 M processors

wjdashwood · Post by **wjdashwood** » Tue Jun 29, 2004 12:51 am

The thing is, I haven't had anyone get back to me saying their current heatsink is no good. I haven't found out what they're all using but they can't all be screw down ones.

How about the Thermalright SLK-900U/A? That should do the trick

alleycat · Post by **alleycat** » Tue Jun 29, 2004 7:36 am

I know the SLK-900 is a good performer, but it's probably overkill for this application. Even if I could find one it would be way too expensive, and I'd prefer something that's not quite as heavy.

wjdashwood · Post by **wjdashwood** » Tue Jun 29, 2004 7:41 am

I've started a thread on my forum to find out what heatsinks my customers and other Mobile Pentium 4M are using. Might help

http://dashwood.me.uk/msgbrd/viewtopic.php?t=17

Post by **Ralf Hutter** » Tue Jun 29, 2004 1:15 pm

alleycat wrote:I know the SLK-900 is a good performer, but it's probably overkill for this application. Even if I could find one it would be way too expensive, and I'd prefer something that's not quite as heavy.

In my mind, unless it's patently unsafe or hellaciously expensive, there's no such thing as "overkill" when it comes to heatsinks. The better it works, the less fannage you need. The less fannage you need, the quieter your system. If it's a good enough heatsink you may even reach that seemingly unobtainable "fanless heatsink" nirvana with a fairly powerful processor.

wjdashwood · Post by **wjdashwood** » Tue Jun 29, 2004 1:56 pm

My thoughts exactly. Bring on the XP-120! I'm sure I could get a MP4M running fanless with one of those.

alleycat · Post by **alleycat** » Tue Jun 29, 2004 2:20 pm

Ralf, sitting here writing this on a passively-cooled C3 system, I can fully appreciate your point. It's just that as enthusiasts we can tend to get a bit obsessed with certain aspects of our projects. Cost, weight, complexity, availability of parts, and physical robustness are other factors I need to consider for a project such as this. The hardware required for a quiet, standard P4 setup nowadays is IMHO becoming prohibitive when viewed in this way. I should add, however, that I am constantly amazed by the ingenious solutions which SPCR readers come up with to get the most out of their systems.

What makes the P4-M attractive to me is its apparent ability to do more with less. It is only because of the price and characteristics of this processor that I should (theoretically) be able to assemble a practical, quiet system with decent performance without spending hundreds of extra dollars on special hardware. I'm not necessarily looking for 'the best', just something that does the job nicely.

wjdashwood · Post by **wjdashwood** » Tue Jun 29, 2004 2:25 pm

Good point, I just didn't see the Thermalright products as that expensive. I picked up my SKU800 off eBay for £15 if I recall correctly.

alleycat · Post by **alleycat** » Tue Jun 29, 2004 2:38 pm

The problem for us living on the other side of the planet from the rest of civilisation is that many products are simply not available here. The only way to get one is by ordering it from overseas, and because of the weight involved, postal charges become ridiculous. It would be nice to just wander down to a computer shop and buy something over the counter for a change!

wjdashwood · Post by **wjdashwood** » Tue Jun 29, 2004 2:43 pm

Perhaps it's time to try making your own heat sink from a sheet of copper and a lot of bending

That's my next project anyway.

alleycat · Post by **alleycat** » Wed Jun 30, 2004 4:39 pm

After checking out some specs on the Intel website I've found out that the IHS adds about 1.5mm above the core. Although this is not an insignificant amount, I did read an article at overclockers about someone who removed the IHS from a socket 423 Willamette 1.7GHz. Using the standard Intel heatsink he mentioned that it did not push down quite as hard as before, but maybe this is a good thing should there be any possibility of damaging the core. Incidentally, the processor ran 4degC cooler...

wjdashwood · Post by **wjdashwood** » Thu Jul 01, 2004 1:46 am

Very interesting, do you have a link to the article?

Thanks,
Will

aidanjm2004 · Post by **aidanjm2004** » Thu Jul 01, 2004 2:56 am

wjdashwood wrote:Very interesting, do you have a link to the article?

There is a brief discussion of heatsink issues here:

http://www.abxzone.com/forums/showthrea ... hlight=p4m
http://www.abxzone.com/forums/showthrea ... hlight=p4m

alleycat · Post by **alleycat** » Thu Jul 01, 2004 10:40 am

The article about removing the IHS is here.

If you want the socket 478 dimensions I can email you with a page I downloaded from the Intel website.

Anyway, to bring the core up to the same height as 'standard' you could try putting a small square of 1.5mm thick copper on the core with a thin smear of thermal compound. Better still, on a heatsink like the Zalmann 7000 you could place a piece of any kind of metal 1.5mm thick in the channel where the steel tensioner pushes down on the centre of the heatsink. That way you're not interfering with the direct heatsink to core contact.

That's all I can think of. If anyone can suggest any other ideas I'd like to hear them.

aidanjm2004 · Post by **aidanjm2004** » Sat Jul 03, 2004 1:21 am

alleycat wrote:The problem for us living on the other side of the planet from the rest of civilisation is that many products are simply not available here. The only way to get one is by ordering it from overseas, and because of the weight involved, postal charges become ridiculous. It would be nice to just wander down to a computer shop and buy something over the counter for a change!

I just noticed that you're also in Melbourne. Where abouts do you get your 'silent computing' gear from? I've found that mail order is pretty much the only option. Ebay can be OK, as well.

Matte · Post by **Matte** » Mon Jul 19, 2004 11:08 pm

Hey guys, will the Pentium 4-M work with my Albatron Px865PE Pro v2.0 motherboard? And I'm somewhat confused íf the Zalman CNPS 7000a-cu works with the Pentium 4-M or not?

wjdashwood · Post by **wjdashwood** » Tue Jul 20, 2004 1:12 am

Should have no trouble working with an Albatron though can anyone confirm this offers undervolting? Most Albatron's do but always good to check first.

Secondly, the 7000a works a treat and is far superior to the Thermalright SKU-800 I've been using. Just check out the screen grab I took while benching my SL-865PE-L. This is on the bench with the VCore set as low as possible (1.1v) and the host clock raised until stability was lost.

http://www.dashwood.me.uk/will/images/1844.2mhz.png

Fan mate was set to lowest setting making it very quiet although I did try it fan less which got temps up to 57. Still quite impressive under full CPU load!

Matte · Post by **Matte** » Tue Jul 20, 2004 8:29 am

Thanks
I know for a fact that my mobo doesn't allow undervolting.
Do I need to be able to undervolt my motherboard to use a Pentium 4-M? Sounds good that I can use my Zalman!

wjdashwood · Post by **wjdashwood** » Tue Jul 20, 2004 8:34 am

Not required but it means you can lovely low temps like shown in the screen grab. If you want to run at 2.6-3.0GHz then you'll need the 1.5v any motherboard will feed it.

accs_centre · Post by **accs_centre** » Sat May 07, 2005 6:13 am

seem cutting off the processor pin is risky too..
If i dont cut the pin, can i use my p4-m 1.7 on desktop mobo? or just there's some limitation? pls advise...

aidanjm2004 · Post by **aidanjm2004** » Sat May 07, 2005 8:46 am

accs_centre wrote:seem cutting off the processor pin is risky too..
If i dont cut the pin, can i use my p4-m 1.7 on desktop mobo? or just there's some limitation? pls advise...

What motherboard are you thinking of using?

Have a look at this guide, also, it's for mobile celerons but some of the info applies to the mobile pentium 4s:

http://forums.anandtech.com/messageview ... id=1527123

grazzy · Post by **grazzy** » Mon May 09, 2005 11:53 am

Hi Guys,

I've got a pundit-r system and want to fit a 2.0ghz celeron mobile, does anyone know what voltage the pundit can go down to?

Can i mod / tweak it lower?

I want to run it as cool as possible, hopefully without a fan, any possibility of this do you think ?

Thanks!
Graeme

aidanjm2004 · Post by **aidanjm2004** » Tue May 10, 2005 4:04 am

grazzy wrote:Hi Guys,

I've got a pundit-r system and want to fit a 2.0ghz celeron mobile, does anyone know what voltage the pundit can go down to?

Can i mod / tweak it lower?

I want to run it as cool as possible, hopefully without a fan, any possibility of this do you think ?

Thanks!
Graeme

Here's a great little guide for using mobile celerons on desktop motherboards:

http://forums.anandtech.com/messageview ... id=1527123

Lots of the information here applies to mobile pentium 4 chips, also.

Gab146 · Post by **Gab146** » Thu Oct 20, 2005 2:32 am

Hi!
Is anybody still here?

I bought a 1.8ghz P4M second hand. I wanted to replace my celeron 2Ghz on my Fujitsu-siemens Laptop. Especially to preserve the fans ;o))
The problem is that the cpu run at 1.2Ghz max! Why? Because the multiplier is 12x and the bus runs at 100Mhz.
In my bios I don't have anything about multiplier or fsb.
I didn't find switches or pins on the motherboard.
It seems that my system doesn't manage speedstep, although it has a sis m650 chipset. (I saw configurations using that chipset with P4M).
The AMILO L 6810 for example.

Mine is an AMILO EL 6800... a little bit older...

What can I do to have my cpu work at its nominal speed 1.8ghz???
Do you have advises???? I'm lost!

Thanks

wjdashwood · Post by **wjdashwood** » Thu Oct 20, 2005 2:38 am

Looks like it's down to that paticular BIOS. I suppose you could take a big risk a try flashing the BIOS with a version for another model which supports speedstep or you could break the BSEL0 pin which may force it to run at 133x12 = 1596 MHz.

Gab146 · Post by **Gab146** » Thu Oct 20, 2005 3:22 am

Hi thanks for the answer.

I wanted to take the risk, and have downloaded the bios software of the Amilo L 6810 that is the next version of my 6800 and that is sold with a p4m. But when launching the software, it stops because of the bios ID non correct...

I already sent an e-mail to AMI (manufacturer of the bios) but I am not hopeful. I don't think they will develop a new bios version just for me

What is that pin you're talking about?
Are you sure it could solve the problem? Because it's a one way ticket...
And my fsb is currently 100Mhz
The cpu is a 1.8ghz. On the EVEREST, it is written 1.8Ghz (12x150)...

Here is a copy of the EVERST report reguarding the cpu and the bios:

Gab146 · Post by **Gab146** » Thu Oct 20, 2005 3:25 am

oops! I forgot the EVEREST report.

--------[ EVEREST Home Edition (c) 2003-2005 Lavalys, Inc. ]------------------------------------------------------------

Version EVEREST v2.20.405/fr
Site web http://www.lavalys.com/
Type de rapport Générateur de rapports
Ordinateur FIORDALISO (Amilo)
Générateur Gab
Système d'exploitation Microsoft Windows XP Home Edition 5.1.2600 (WinXP Retail)
Date 2005-10-18
Heure 16:01

--------[ Overclock - FIORDALISO (Amilo) ]------------------------------------------------------------------------------

Propriétés du processeur:
Type de processeur Mobile Intel Pentium 4M
Alias du processeur Northwood, A80532
Engineering Sample Non
(CPUID) Nom du processeur Intel(R) Pentium(R) 4 Mobile CPU 1.80GHz
(CPUID) Révision 00000F24h

Vitesse du CPU:
Vitesse d'horloge du processeur 1202.70 MHz (original: 1800 MHz)
Multiplicateur du CPU 12.0x
FSB du CPU 100.22 MHz (original: 100 MHz)

Cache du CPU:
Cache de trace de niveau 1 12K Instructions
Cache de données de niveau 1 8 Ko
Cache de niveau 2 512 Ko (On-Die, ECC, ATC, Full-Speed)

Propriétés de la carte mère:
Identifiant de la carte mère 63-0620-009999-00101111-040201-SiS650$1AAWV003_BIOS (NB) VERSION: 1.03C
Nom de la carte mère Inconnu

Propriétés du chipset:
Chipset de la carte mère SiS 650
Performances mémoire 2.5-3-3-6 (CL-RCD-RP-RAS)

Modules de mémoire SPD:
DIMM1: Infineon 64D32920GDL7B 256 Mo PC2100 DDR SDRAM (2.5-3-3-7 @ 142 MHz) (2.0-3-3-6 @ 133 MHz)
DIMM2: Samsung M4 70L3224DT0-CB0 256 Mo PC2100 DDR SDRAM (2.5-3-3-6 @ 133 MHz) (2.0-2-2-5 @ 100 MHz)

Propriétés du BIOS:
Date du BIOS système 12/22/03
Date du BIOS vidéo 11/27/20
Version du BIOS 1.03C

--------[ Processeur ]--------------------------------------------------------------------------------------------------

Propriétés du processeur:
Type de processeur Mobile Intel Pentium 4M, 1800 MHz (12 x 150)
Alias du processeur Northwood, A80532
Jeu d'instructions x86, MMX, SSE, SSE2
Vitesse d'horloge originelle 1800 MHz
Min / Max du multiplicateur du CPU 12x / 18x
Engineering Sample Non
Cache de trace de niveau 1 12K Instructions
Cache de données de niveau 1 8 Ko
Cache de niveau 2 512 Ko (On-Die, ECC, ATC, Full-Speed)

Fabricant du processeur:
Nom de l'entreprise Intel Corporation
Information sur le produit http://www.intel.com/products/browse/processor.htm

Utilisation du processeur:
Processeur nº1 13 %

wjdashwood · Post by **wjdashwood** » Thu Oct 20, 2005 3:27 am

There are absolutely no guarantees either way I'm afraid but if you break the pin, the worst that could happen (I guess) is that the processor still runs at 100x12 because the motherboard/BIOS doesn't support a 133MHz bus speed. I have to say it's very likely that it won't work because laptops are never designed with that much flexibility. I would try and see if someone has managed to hack a BIOS to support SpeedStep. Maybe hex editing the BIOS you found so that the ID is changed but I have no idea how you would do that I'm afraid.

Gab146 · Post by **Gab146** » Thu Oct 20, 2005 3:37 am

Where is located that pin? Where can I learn a little more about that pin?
Maybe I will try to edit the bios file, but I'm not an expert, I don't think I will succeed...
I will have look also for bios hacked, it's a good idea

.
Thanks for all, I don't have time now, but I'll keep you informed.

wjdashwood · Post by **wjdashwood** » Thu Oct 20, 2005 4:32 am

http://dashwood.me.uk/intel-mobile-pent ... page=0%2C2

Goog luck

My little guide to Mobile Pentium 4 M processors

pundit voltage

Re: pundit voltage

problem with P4M !