Celeron M Vs Pentium M

[amdforever2]

What are the main differences between a Celeron M at 1.4 and a Pentium M at 1.4?

Anandtech doesn't seem to have an article on the Celeron M at all.

 

[Away]

Double the L2 cache. I believe a faster FSB as well.

 

[Lonyo]

I think the Celeron may also lack power conservation technologies (ie: it runs at full speed all the time).

 

[johnnqq]

i'm pretty sure (i'm no intel expert...) that the celeron M isn't a crippled chip like it is to the pentium 4. it's got half the cache, but the same speed.

 

[amdforever2]

The Celeron M has 1MB L2 then and the Pentium M 2MB? That's it?

 

[Away]

Yeah, and I think the Celeron has a 400 FSB while the Pentium has a 533 FSB. You probably wouldn't notice much of a difference though.

 

[tomt4535]

The Celeron dosent have Speedstep either, so it wont clock itself down when its not being used, saving battery power and heat.

 

[amdforever2]

Speedstep doesn't matter to me. The FSB thing is not too much of an issue, the laptop I'm getting has integrated video so I won't be doing any gaming really.

The Celeron M type notebooks use DDR 1 at 333mhz right?

 

[fbrdphreak]

Current Celeron M's are based on the same 90nm Dothan core. They have 1/2 the L2 cache disabled (1MB total), Enhanced Intel Speedstep is disabled (doesn't downclock at all), and I believe some of the other power saving features are not implemented (buffer deactivation and such).

Also check the L1 cache, it may have less of that too; but I'm not sure.

 

[coldpower27]

Originally posted by: fbrdphreak
Current Celeron M's are based on the same 90nm Dothan core. They have 1/2 the L2 cache disabled (1MB total), Enhanced Intel Speedstep is disabled (doesn't downclock at all), and I believe some of the other power saving features are not implemented (buffer deactivation and such).

Also check the L1 cache, it may have less of that too; but I'm not sure.

Nah, they never disable LV1 cache these days. The rest of the stuff is right. There shouldn't be too much differences between the Celeron M 380 vs say the Pentium M 730.

 

[coldpower27]

Originally posted by: amdforever2
Speedstep doesn't matter to me. The FSB thing is not too much of an issue, the laptop I'm getting has integrated video so I won't be doing any gaming really.

The Celeron M type notebooks use DDR 1 at 333mhz right?

Not always.

http://catalog.hsn.com/prod-15678/ec/50/hp!sf!50/2187289/2187289.htm

 

[n7]

Yeah, the Celeron M is a great cheaper alternative to the Pentium M.

 

[stevty2889]

Peformance wise, the celeron-m and pentium-m are pretty close. Like already mentioned, the celeron-m has half the cache(1m vs 2m), and lacks all the power savings features, so it reduces battery life by a good bit.

 

[Zap]

The RAM choice depends on the notebook manufacturer's choice of chipset and implementation. DDR has a hair better latency while DDR has a hair better possible clock speed and lower power usage. Then again, most people wouldn't be able to notice a hair's difference. The cache difference isn't all that because the last gen Pentium M (Banias) used only 1MB cache, so the Dothan Celeron M is as fast as previous Pentium M, even to the same FSB speed. The Dothan Pentium M can be had with either 400MHz or 533MHz FSB speeds depending on speed grade, and some speed grades have both available.

The only difference purely between the CPUs that REALLY matters is Speedstep, meaning Pentium M will average better battery life than Celeron M, all else being equal.

In RL (real life) there are other differences due to marketing and price points. Though the CPUs are close enough, many manufacturers will only put Celeron M in lower end notebooks and Pentium M in higher end notebooks.

 

[Leper Messiah]

Originally posted by: Zap
The RAM choice depends on the notebook manufacturer's choice of chipset and implementation. DDR has a hair better latency while DDR has a hair better possible clock speed and lower power usage. Then again, most people wouldn't be able to notice a hair's difference. The cache difference isn't all that because the last gen Pentium M (Banias) used only 1MB cache, so the Dothan Celeron M is as fast as previous Pentium M, even to the same FSB speed. The Dothan Pentium M can be had with either 400MHz or 533MHz FSB speeds depending on speed grade, and some speed grades have both available.

The only difference purely between the CPUs that REALLY matters is Speedstep, meaning Pentium M will average better battery life than Celeron M, all else being equal.

In RL (real life) there are other differences due to marketing and price points. Though the CPUs are close enough, many manufacturers will only put Celeron M in lower end notebooks and Pentium M in higher end notebooks.

so are they banias cores with Speed Step disabled, or dothans with half cache and speed step and all that other crap?

But yeah, IMO Celeron Ms are the best celeron's since the 300A

 

[Zap]

Banias = 130nm
Dothan = 90nm plus some optimizations

Celeron M Banias = 512k cache, 130nm, 400MHz FSB
Pentium M Banias (I've owned one) = 1MB cache, 130nm, 400MHz FSB, Speedstep
Celeron M Dothan = 1MB cache, 90nm, 400MHz FSB
Pentium M Dothan (I currently have one) = 2MB cache, 90nm, 400MHz or 533MHz FSB, Speedstep

That's it AFAIK, not counting the special ULV models for the subnotebook market.