Whats the difference between Celeron & P4 + other stuff.

[parkie]

Celeron to P4 upgrade, need help..

Is it just cache or is there more to it. I'm upgrading my laptop from a 2.0Ghz Celeron to a P4 of 2.2 or 2.4 depending what I can find and I was wondering what the actual difference in the chips is.
Also, the chip I've got in mine looks similar to this:

But there are some that look like this:

My question is: can the cover thing be taken off? If so, would it then look the same as the one in the top image. I only ask this because the cooler on my laptop seems to be designed for chips without the cover.

hope you can help

cheers

P

 

[steve258]

The one without cover:

Mobile Pentium 4 - M

1.6Ghz - 2.6Ghz / FSB 400Mhz / 512Kb L2

The one with cover:

Mobile Pentium 4

2.4Ghz - 3.066Ghz (I think) / FSB 533Mhz / 512Kb L2

The one without cover has better power saving features, runs at lower volt and thus generates less heat, used in most laptops.

The one with cover is closer to the desktop version, runs faster but generate more heat and thus has IHS (integrated heat spreader...... the cover, duh!! ), it is designed for desktop-replacement laptops. The IHS is clued onto the core so chances are you won't be able to remove it without damaging the core. Even if you managed to remove it you can't be sure if it will work on your laptop or if the cooling design will cope with the excessive heat.

 

[parkie]

The one without cover:

Mobile Pentium 4 - M

1.6Ghz - 2.6Ghz / FSB 400Mhz / 512Kb L2

The one with cover:

Mobile Pentium 4

2.4Ghz - 3.066Ghz (I think) / FSB 533Mhz / 512Kb L2

The one without cover has better power saving features, runs at lower volt and thus generates less heat, used in most laptops.

The one with cover is closer to the desktop version, runs faster but generate more heat and thus has IHS (integrated heat spreader...... the cover, duh!! ), it is designed for desktop-replacement laptops. The IHS is clued onto the core so chances are you won't be able to remove it without damaging the core. Even if you managed to remove it you can't be sure if it will work on your laptop or if the cooling design will cope with the excessive heat.

excellent news, so they did make them up to 2.6 without the IHS ( . Maybe I'll wait and see if a 2.4 comes available. I was thinking of just getting a 2.2 because of the heat issues that I might run in to, I wouldn't of thought an extra 200mhz would do any damage!!

cheers mate

p

 

[parkie]

OK, I had a 2.2Ghz Pentium 4-M C1 SL6J5 arrive today and so I installed it instantly. The problem is that the Laptop Motherboard will only run it at 1.2Ghz. It recognizes it in the bios as the correct CPU but will only run it at it's power saving speed (1.2Ghz). Anyone know why this would happen?

cheers

p

 

[steve258]

I know that it happens with all mobile P4s when used on a desktop motherboard; the multi will be fixed @ 12 and the speed is default to 1.2Ghz. But it shouldn't happen on a laptop as long as your laptop mobo supports P4-M. I upgraded my laptop cpu to a P4-M 2Ghz and it was properly recognised and default to 2ghz

Try go into the power management in windows and change the profile to desktop or minimum power saving mode and see if there is any difference in CPU speed.

 

[parkie]

Didn't realise you were going to use it on a desktop . Yeah it happens with all mobile P4s when used on a desktop chipset; the multi will be fixed @ 12 and the speed is default to 1.2Ghz.

There is no way to fix this I'm afraid except from raising the fsb to make it run at its default speed. I had a Mobile P4-M 2Ghz D1 and a 1.8Ghz C1 both will happily run @ 3.3Ghz stable.

It wasn't on a desktop, it was my laptop which uses the SIS650 chipset which now assume is really a desktop chipset. There are no options for raising the FSB in the bios so I have to find the right chip presumable one that doesn't have the speed stepping multiplier. BTW the Celeron thats in the Laptop is running at 1.3v so I can't really put a desktop processor in it as it will be too hot. So what I'm trying to find is a mobile P4 that runs at ~1.3v and only has the single speed rating.

thanks for the info, I think I'm closing in on the solution slowly!!

P

 

[steve258]

It wasn't on a desktop, it was my laptop which uses the SIS650 chipset which now assume is really a desktop chipset. There are no options for raising the FSB in the bios so I have to find the right chip presumable one that doesn't have the speed stepping multiplier. BTW the Celeron thats in the Laptop is running at 1.3v so I can't really put a desktop processor in it as it will be too hot. So what I'm trying to find is a mobile P4 that runs at ~1.3v and only has the single speed rating.

thanks for the info, I think I'm closing in on the solution slowly!!

P

LOL fast reply yeah just realised you were using it on a laptop and I just finished editing my post . If it is a desktop chipset your laptop is using then there is no fix if the chipset doesn't properly support MP4-M cpus.

That explains it, a mobile celeron does not have speedstep technology so it only runs 1 speed rating whether running on a desktop or laptop. Voltage has nothing to do with the speed here in fact the MP4-M works @ mere 1.2V!!

Another thing worth notice is that a desktop chipsets may incorrectly recognise the default voltage for the P4-M; my mobo put 1.6V through my P4-M @ default !! I'd check CPU-Z to see the what vcore your cpu is running first.

I'm afraid at this stage it's either a desktop P4 or another Mobile Celeron (Not Celeron M it's a different CPU!!) I know that the highest model also runs @ 2.6Ghz.