p4m or plain p4?

FreakyA · 4th March 2004, 1:21 AM

I'm shopping around for a laptop and im wondering if there is any big difference between the p4M chip and the strait p4. Ive seen that all the p4m chips run way slower than their p4 counterparts, why is that?

ifrit375 · 4th March 2004, 7:33 AM

P4M are more friendly on battery because it can reduce it's speed when you are doing basic stuff(speed step i think). While the P4 is just a normal desktop processor, it's usally runs really hot.

SLATYE · 4th March 2004, 8:30 AM

Quote:

Originally posted by ifrit375
P4M are more friendly on battery because it can reduce it's speed when you are doing basic stuff(speed step i think). While the P4 is just a normal desktop processor, it's usally runs really hot.

That's just what I would have said. The P4M is a P4, but running on lower voltages and running much cooler. It also has technology which allows it to change it's speed while running. It will generally run fairly slowly when you're not doing anything improtant, because it saves battery life. When you're playing games (or doing something that really needs a fast CPU) it'll go back up to full speed.

The P4 is just a desktop CPU. It'll run hot, and eat battery life, but it should run at full speed all the time.

FreakyA · 4th March 2004, 10:12 AM

so a 1.7 ghz mobility would run at 1.7 during intensive applications? It's not like the celeron where its speeds are hampered?

MOBIVision · 4th March 2004, 2:37 PM

Basically there are 3 flavours of Intel CPUs for notebooks.

Pentium - M (Part of the centrino system)
This processor features lower clock speeds with a large amount of cache. It throttles during periods of low loads and is currently the latest technology. Available from around 1.3GHz to 1.7GHz. It will run at full speed while you are using intensive applications and slow down to save battery when you are not doing much. These are currently the most power efficient.

A 1.7GHz Pentium - M will be around as fast as a 2.6GHz Pentium 4 in real world apps.

Pentium 4 - M
This is a mobile version of the pentium 4 cpu. It is basically a pentium 4 with the ability to throttle its core frequency on the fly. So while you are not using much CPU time, the clock speed will decrease. When you are using CPU intensive applications, the clock speed will increase to full speed. Generally a 2.4GHz Pentium 4 - M will be just as fast as a 2.4GHz Pentium 4. These are an older technology and are getting harder to find. They are being replaced by the Pentium - M technology.

Pentium 4 - Desktop
This is simply a desktop CPU put in a notebook. They offer the most processing power and least power efficiency, and run at full speed all the time. These are becoming more common due to price and increased miniturisation (putting more and more functinos on the north and south bridge), making the motherboard smaller and allowing a full P4 mobo to cram into a notebook. You can get a full 800MHz HT system as a notebook nowadays. These are great for desktop replacement systems, however they will CHEW through the batteries. Expect <2 hours battery life depending on the size of your battery.

Hope this helps.

FreakyA · 4th March 2004, 5:32 PM

thx mobile vision, :-D

nakey · 5th March 2004, 12:05 AM

Ok, so if that's the difference between the Pentium M, the Desktop P4 and the Mobile Pentium 4-M, then what's the difference between the Mobile Pentium 4 and the Mobile Pentium4-M, apart from FSB (533Mhz vs 400 Mhz) and HT on selected Mobile P4s?

MOBIVision · 5th March 2004, 11:43 AM

When you start talking Mobile Pentium 4 it becomes confusing.

I am aware of the Mobile Pentium 4, but I believe at this stage they simply call desktop processors Mobile Pentium 4 when they put them in a notebook. I am not sure of the details of these and have not seen them in specifications of our notebooks to date.

If you have some information let me know because I am interested in these Mobile Pentium 4's also, but have a suspicion that Intel are calling the desktop processors this when they put them in notebooks.

ifrit375 · 5th March 2004, 7:25 PM

Quote:

Originally posted by MOBIVision
Basically there are 3 flavours of Intel CPUs for notebooks.

Pentium - M (Part of the centrino system)
This processor features lower clock speeds with a large amount of cache. It throttles during periods of low loads and is currently the latest technology. Available from around 1.3GHz to 1.7GHz. It will run at full speed while you are using intensive applications and slow down to save battery when you are not doing much. These are currently the most power efficient.

I thought u can get the Pentium-M in 900Mhz, acer c110 has a 900 pentium-m.

MOBIVision · 5th March 2004, 7:36 PM

There are some low voltage pentium -M for very low power usage applications.

SLATYE · 5th March 2004, 7:36 PM

Quote:

Originally posted by ifrit375
I thought u can get the Pentium-M in 900Mhz, acer c110 has a 900 pentium-m.

Yes, I think I remember Intel making an 'ultra-low-power' version for tablet PCs and similar things, where speed isn't important, but heat and battery life are.

Otherwise, Acer might have just clocked it lower to cut heat.

FreakyA · 5th March 2004, 7:59 PM

read this:

http://www.cpuid.com/PentiumM/index.php

it addresses the 900mhz ultra low voltage pentium M, as well as other lots of interesting technical info.

MOBIVision · 5th March 2004, 8:41 PM

Nice. Heaps of info. Cheers.

ifrit375 · 5th March 2004, 11:05 PM

Thx for sharing the info with us.

nakey · 7th March 2004, 4:44 AM

Quote:

Originally posted by MOBIVision
I am aware of the Mobile Pentium 4, but I believe at this stage they simply call desktop processors Mobile Pentium 4 when they put them in a notebook.

If that's the case, then i'd be very happy as there'd be a 3.2G processor for my oldish motherboard.

the Mobile P4 3.2 runs at 133mhz x24 while the Desktop P4 3.2s run at 200mhz x16

4th March 2004, 1:21 AM	#1
FreakyA Member Join Date: Dec 2003 Location: melbourne Posts: 133	p4m or plain p4? I'm shopping around for a laptop and im wondering if there is any big difference between the p4M chip and the strait p4. Ive seen that all the p4m chips run way slower than their p4 counterparts, why is that?

4th March 2004, 7:33 AM	#2
ifrit375 Member Join Date: Feb 2002 Location: melbourne Posts: 448	P4M are more friendly on battery because it can reduce it's speed when you are doing basic stuff(speed step i think). While the P4 is just a normal desktop processor, it's usally runs really hot. __________________ Canon 5DMK II \| Canon 24-70mm f/2.8L \| 50mm f/1.2L \| 70-200mm f/2.8L \| Canon 430EX II

4th March 2004, 2:37 PM	#5
MOBIVision Member Join Date: Feb 2004 Location: Sunny Perth, WA Posts: 19	Basically there are 3 flavours of Intel CPUs for notebooks. Pentium - M (Part of the centrino system) This processor features lower clock speeds with a large amount of cache. It throttles during periods of low loads and is currently the latest technology. Available from around 1.3GHz to 1.7GHz. It will run at full speed while you are using intensive applications and slow down to save battery when you are not doing much. These are currently the most power efficient. A 1.7GHz Pentium - M will be around as fast as a 2.6GHz Pentium 4 in real world apps. Pentium 4 - M This is a mobile version of the pentium 4 cpu. It is basically a pentium 4 with the ability to throttle its core frequency on the fly. So while you are not using much CPU time, the clock speed will decrease. When you are using CPU intensive applications, the clock speed will increase to full speed. Generally a 2.4GHz Pentium 4 - M will be just as fast as a 2.4GHz Pentium 4. These are an older technology and are getting harder to find. They are being replaced by the Pentium - M technology. Pentium 4 - Desktop This is simply a desktop CPU put in a notebook. They offer the most processing power and least power efficiency, and run at full speed all the time. These are becoming more common due to price and increased miniturisation (putting more and more functinos on the north and south bridge), making the motherboard smaller and allowing a full P4 mobo to cram into a notebook. You can get a full 800MHz HT system as a notebook nowadays. These are great for desktop replacement systems, however they will CHEW through the batteries. Expect <2 hours battery life depending on the size of your battery. Hope this helps. __________________ MOBIVision Online Notebook Superstore www.mobivision.com.au Email Us

5th March 2004, 11:43 AM	#8
MOBIVision Member Join Date: Feb 2004 Location: Sunny Perth, WA Posts: 19	When you start talking Mobile Pentium 4 it becomes confusing. I am aware of the Mobile Pentium 4, but I believe at this stage they simply call desktop processors Mobile Pentium 4 when they put them in a notebook. I am not sure of the details of these and have not seen them in specifications of our notebooks to date. If you have some information let me know because I am interested in these Mobile Pentium 4's also, but have a suspicion that Intel are calling the desktop processors this when they put them in notebooks. __________________ MOBIVision Online Notebook Superstore www.mobivision.com.au Email Us

5th March 2004, 7:36 PM	#10
MOBIVision Member Join Date: Feb 2004 Location: Sunny Perth, WA Posts: 19	There are some low voltage pentium -M for very low power usage applications. __________________ MOBIVision Online Notebook Superstore www.mobivision.com.au Email Us

4th March 2004, 10:12 AM	#4
FreakyA Member Join Date: Dec 2003 Location: melbourne Posts: 133	so a 1.7 ghz mobility would run at 1.7 during intensive applications? It's not like the celeron where its speeds are hampered?

4th March 2004, 5:32 PM	#6
FreakyA Member Join Date: Dec 2003 Location: melbourne Posts: 133	thx mobile vision, :-D

5th March 2004, 12:05 AM	#7
nakey Member Join Date: Jul 2002 Location: Melbourne, Australia. Posts: 1,930	Ok, so if that's the difference between the Pentium M, the Desktop P4 and the Mobile Pentium 4-M, then what's the difference between the Mobile Pentium 4 and the Mobile Pentium4-M, apart from FSB (533Mhz vs 400 Mhz) and HT on selected Mobile P4s?

5th March 2004, 7:59 PM	#12
FreakyA Member Join Date: Dec 2003 Location: melbourne Posts: 133	read this: http://www.cpuid.com/PentiumM/index.php it addresses the 900mhz ultra low voltage pentium M, as well as other lots of interesting technical info.

5th March 2004, 8:41 PM	#13
MOBIVision Member Join Date: Feb 2004 Location: Sunny Perth, WA Posts: 19	Nice. Heaps of info. Cheers. __________________ MOBIVision Online Notebook Superstore www.mobivision.com.au Email Us

5th March 2004, 11:05 PM	#14
ifrit375 Member Join Date: Feb 2002 Location: melbourne Posts: 448	Thx for sharing the info with us. __________________ Canon 5DMK II \| Canon 24-70mm f/2.8L \| 50mm f/1.2L \| 70-200mm f/2.8L \| Canon 430EX II