Upgrade to Dothan on T40p

fasterbybike · **Posted:** Thu Aug 09, 2007 10:59 pm

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 · **Posted:** Fri Aug 10, 2007 3:02 am

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:

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 · **Posted:** Fri Aug 10, 2007 6:08 am

Thanks Harry

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

sktn77a · **Posted:** Fri Aug 10, 2007 8:21 am

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 · **Posted:** Sat Aug 11, 2007 12:34 am

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 · **Posted:** Mon Aug 13, 2007 5:22 pm

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 · **Posted:** Fri Sep 07, 2007 1:35 am

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 · **Posted:** Wed Sep 19, 2007 4:54 am

fasterbybike wrote:

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 · **Posted:** Sun Sep 23, 2007 8:17 am

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 · **Posted:** Tue Sep 25, 2007 10:21 pm

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 · **Posted:** Wed Sep 26, 2007 4:48 am

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 · **Posted:** Tue Apr 15, 2008 5:19 pm

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.

Harryc wrote:

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:

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 · **Joined:** Fri Jun 08, 2007 2:36 pm **Posts:** 1062

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 · **Posted:** Tue Apr 15, 2008 5:55 pm

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 · **Posted:** Tue Apr 15, 2008 6:44 pm

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 · **Posted:** Wed Apr 16, 2008 5:03 pm

ebayking90 wrote:

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 · **Posted:** Sun Jun 08, 2008 7:14 am

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 · **Posted:** Mon Jun 09, 2008 3:42 pm

Nobody knows ?

sktn77a · **Posted:** Mon Jun 09, 2008 3:47 pm

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.

:wink:

Teflon77 · **Posted:** Mon Jun 09, 2008 10:57 pm

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

Harryc wrote:

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:

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 · **Posted:** Tue Jun 10, 2008 5:59 am

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

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

pseudonym · **Posted:** Fri Jun 13, 2008 1:52 pm

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 · **Posted:** Wed Jun 18, 2008 3:37 pm

pseudonym wrote:

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 · **Posted:** Sun Jul 27, 2008 12:04 am

psyheah wrote:

fasterbybike wrote:

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

Upgrade to Dothan on T40p

Who is online