Upgrade to Dothan on T40p

[fasterbybike]

I'd like to upgrade my CPU from Banias to Dothan e.g. 755 on page http://www.intel.com/products/processor ... tium_m.htm

My question is - how do I know what package to buy given that these are available as both a 478-pin Micro-FCPGA and a 479-ball Micro-FCBGA (without opening up my thinkpad yet).

CPU Z shows my package as Socket 479 but the wiki article on socket 479 (http://en.wikipedia.org/wiki/Socket_479) does not clarify matters.

Do I need the CPU package with pins, or a CPU ball package.

[Harryc]

You want socket 479. Use the following link. Any CPU on the Dothan (standard voltage) list will be fine, but stay away from the 7**As. You also need to ensure you get a B stepping chip. The C stepping chips do not work at full speed. You want 400MT/s Front side bus for your T40.

Intel Pentium M's

These will all work -

Code: Select all

Pentium M 710 	SL7V5 (B1) 	1400 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GK (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GL (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7F2 (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7EG (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7ER (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7EP (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EQ (B1) 	1800 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EN (B1)	 1800 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EL (B1) 	2000 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EM (B1) 	2000 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7UZ (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7V3 (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	

[fasterbybike]

Thanks Harry

I thought this might have been the case. Just the socket 479 and 478 pin business confusing me

[sktn77a]

No reported failures yet that I'm aware of with the most commonly available 2.0 Dothan 755 (SL7EM). Some folks report temperatures up to 75oC with the 755 in a T40 with the Radeon 7500 and short fan (see posting "Acceptable CPU Temperature"); I'm one of them! But others have reported lower temperatures. I'm a little uncomfortable with 75oC but no obvious problems so far so I'm keeping my fingers crossed.

[fasterbybike]

Interesting. CPU-Z has yet to report higher than 55 for the standard 1.6 Banias with FireGL9000. The machine does have the long fan though.

[fasterbybike]

And just to add some more info after opening up the case.

The existing processor is SL6FA, which is a Banias 1.6. The physical form is a 478 pin FCPGA module which mounts in a 479 hole socket (aka socket 479).

So there is one unfilled hole, just in case you wondered !
So my upgrade to SL7EM will fit.

[fasterbybike]

My 2.0 GHz SL7EM Pentium M upgrade has arrived and been fitted.

Using Performance Test by Passmark I found the following improvement:
1.6GHz (before) 159
2.0GHz (after) 202

That's a 27% performance improvement !!!!

[psyheah]

My 2.0 GHz SL7EM Pentium M upgrade has arrived and been fitted.

Using Performance Test by Passmark I found the following improvement:
1.6GHz (before) 159
2.0GHz (after) 202

That's a 27% performance improvement !!!!

Which CPU test in Performance Test did you get the figures from?

Was this CPU Mark?

[cirthix]

there is absolutely no difference between "478" and "479" socket pentium-m. All pentium-ms come in two formats: bga, which you can't easily change anyway, and the familliar fcpga package. All pentium-ms are interchangeable, though you may need to update the bios on older boards (and of course, 133fsb chips will only run at 100fsb if they're in a 100fsb board).

[ebayking90]

Are you sure that T40s can only be upgraded with Pentium M's. Are there any other processors out there that will work? What about the Pentium 4Ms. They are 478-pin Micro-FCPGA and the FSB is 400mhz in the range of 1.5GHZ to 2.6GHZ. From what I have read that should fit the bill. Someone please inform me if I am wrong.

[Harryc]

T40's only take Pentium M's (Banias or Dothans). That's it. Period. End of the line. Finito. Shut it down and go home . If you're worried about price choose a Banias.

[lemmerdeur]

I don't understand, SL7EN is a 478 socket and is in the compatible list of CPU??? What do you mean by stay away from 7**? I am trying to find a CPU 1.8 to 2.0 compatible with a T42p motherboard.

You want socket 479. Use the following link. Any CPU on the Dothan (standard voltage) list will be fine, but stay away from the 7**As. You also need to ensure you get a B stepping chip. The C stepping chips do not work at full speed. You want 400MT/s Front side bus for your T40.

Intel Pentium M's

These will all work -

Code: Select all

Pentium M 710 	SL7V5 (B1) 	1400 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GK (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GL (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7F2 (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7EG (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7ER (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7EP (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EQ (B1) 	1800 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EN (B1)	 1800 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EL (B1) 	2000 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EM (B1) 	2000 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7UZ (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7V3 (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	

[aaa]

Ignore the socket, there are 3 or 4 different sockets with the same number of pins, some called 478 or 479, all incompatible.

Just look for stuff off Harryc's list, it's the complete list of every possible cpu that works without problems.

And 7**A refers to cpus like the 745a, which will be stuck at 600mhz unless you mess with it. Hence the avoiding.

[zdriver]

The only real decision you have if you follow harryc's list is .... to invest $80 or $200+ which meet the speed requirement you mentioned.

[sktn77a]

HarryC meant don't get a CPU with the "A" suffix after the number. The 2.0 and 2.1 CPU's run hotter on some machines than others (see earlier posts) but don't seem to have been a problem.

[thejaredhuang]

Are you sure that T40s can only be upgraded with Pentium M's. Are there any other processors out there that will work? What about the Pentium 4Ms. They are 478-pin Micro-FCPGA and the FSB is 400mhz in the range of 1.5GHZ to 2.6GHZ. From what I have read that should fit the bill. Someone please inform me if I am wrong.

Even if you could urn a Pentium 4M you would regret it the instant you turn it on. Not only is it slower clock for clock, but it runs much hotter. A 1.8GHz Pentium M will annihilate a P4M at the same speed and run cooler.

[Teflon77]

So, if I want to upgrade my T42 to 1.7 to 2.0ghz, i can either buy this one (479-ball Micro-FCBGA) or this one (478-pin Micro-FCPGA)?

I just have to check if my bios is up to date ...

Thank's

[Teflon77]

Nobody knows ?

[sktn77a]

You need the SL7EM (stepping is at the top of the page for each CPU). Be aware that with the graphics chip and this processor, you could probably heat your home in the winter months!

Edit: Oops - thought you were the OP with the T40p. With a T42 and the 7500 or 9600 graphics chips, you should be fine with the 2.0GHz PM.

[Teflon77]

So, why those 2 cpus are in the list Harryc show us ?

You want socket 479. Use the following link. Any CPU on the Dothan (standard voltage) list will be fine, but stay away from the 7**As. You also need to ensure you get a B stepping chip. The C stepping chips do not work at full speed. You want 400MT/s Front side bus for your T40.

Intel Pentium M's

These will all work -

Code: Select all

Pentium M 710 	SL7V5 (B1) 	1400 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GK (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 715 	SL7GL (B1) 	1500 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7F2 (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 725 	SL7EG (B1) 	1600 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7ER (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 735 	SL7EP (B1) 	1700 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EQ (B1) 	1800 MHz 	2048 KiB 	400 MT/s 	
Pentium M 745 	SL7EN (B1)	 1800 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EL (B1) 	2000 MHz 	2048 KiB 	400 MT/s 
Pentium M 755 	SL7EM (B1) 	2000 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7UZ (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	
Pentium M 765 	SL7V3 (B1) 	2100 MHz 	2048 KiB 	400 MT/s 	

[Harryc]

Guys, this is not 'my' list. It was extracted from wikipedia.

http://en.wikipedia.org/wiki/List_of_In ... processors

[pseudonym]

I'm no expert, but I would strongly recommend avoinding micro fcbga. bga is ball grid, most likely for soldered on solutions, pga is pin grid, for zif sockets like the ones in the t4 series.

[Teflon77]

I'm no expert, but I would strongly recommend avoinding micro fcbga. bga is ball grid, most likely for soldered on solutions, pga is pin grid, for zif sockets like the ones in the t4 series.

I just bought a 479-ball Micro-FCBGA and, you're right, it's totally not matching ...

So, for those who want to upgrade their cpu, avoid the BGA version !

[NorrisCell]

My 2.0 GHz SL7EM Pentium M upgrade has arrived and been fitted.

Using Performance Test by Passmark I found the following improvement:
1.6GHz (before) 159
2.0GHz (after) 202

That's a 27% performance improvement !!!!

Which CPU test in Performance Test did you get the figures from?

Was this CPU Mark?

I'm curious which results you're posting as well.

If it's the CPU Mark score, that's abnormally low. If it's the Passmark Rating, it's abnormally high.

My 1.8 Dothan pulled 429 and 116, respectively, in those categories