Dothan Cpu upgrade available

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cmarti · #1 Post by **cmarti** » Sun Mar 05, 2006 12:34 am

I just upgrade my T40 CPU and i place for sale the one i replaced on ebay, It is working perfect!!
It is a Pentium 745 1.8Ghz clock speed with 2Mb cache and 400FSB.
( Upgrade your slow Banias)
Here is the link:

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... %3AIT&rd=1

So don't miss this oportunity to upgrade your T4x and add more power to it.

lithium726 · #2 Post by **lithium726** » Sun Mar 05, 2006 1:37 am

you might want to be careful saying its "compatable with all centrino notebooks," as any system that shipped with a Banias CPU must have support for a dothan (130nm to 90nm) written into the BIOS...

it only works in the T40 'cause the T40 shares the same system board and BIOS with the T42.

cmarti · #3 Post by **cmarti** » Sun Mar 05, 2006 1:55 am

Fixed.

Thanks for the head's up!!

brentpresley · #4 Post by **brentpresley** » Sun Mar 05, 2006 2:15 am

lithium726 wrote:you might want to be careful saying its "compatable with all centrino notebooks," as any system that shipped with a Banias CPU must have support for a dothan (130nm to 90nm) written into the BIOS...

it only works in the T40 'cause the T40 shares the same system board and BIOS with the T42.

Completely false. He was correct originally and you are wrong.

If the computer accepts a Pentium M (any speed) then this chip will work in there. All that it needs is the latest BIOS and Embedded Controller from IBM (which contains the proper microcode update to recognize the 90nm chips).

e.g A T40, or T41, or T42, or EVEN A T43 would take the chip just fine (it would just run at 400FSB in the T43, not at the faster 533 that the Sonoma chipset supports).

lithium726 · #5 Post by **lithium726** » Sun Mar 05, 2006 2:21 am

erm... he said that ALL centrino notebooks will accept it. that is wrong. i am sure some centrino notebooks out there exist without a bios that accepts Dothan chips. check out the auction, he says any centrino notebook will accept it.

i never contested that a T4x would accept it, in fact said that any one would

det922 · #6 Post by **det922** » Mon Mar 06, 2006 3:50 am

so u mean to tell me for the t43p that im biulding by parts i could use the processer from my broken t41 (id like to use as many parts as possible)?

cmarti · #7 Post by **cmarti** » Mon Mar 06, 2006 6:05 am

You can install it but if will run at 400fsb. But if you like to run it at 533fsb and by the way overclock it follow this link:

http://forum.thinkpads.com/viewtopic.php?t=21152

Try it and keep us posted. Don't forget to use thermal paste for the cpu.

det922 · #8 Post by **det922** » Mon Mar 06, 2006 6:30 am

id like to try it at 400 first, its really garranteed to work? with a 1.6 from a t41? thats amazing would save me alot if true, im waiting for a few more parts (i got to sell my memory to buy some ddr2) im just hoping for a smooth transition, but the dothans are out of my $$ league at the moment and if id be able to use my old one id be insanely happy

brentpresley · #9 Post by **brentpresley** » Mon Mar 06, 2006 7:10 am

det922 wrote:id like to try it at 400 first, its really garranteed to work? with a 1.6 from a t41? thats amazing would save me alot if true, im waiting for a few more parts (i got to sell my memory to buy some ddr2) im just hoping for a smooth transition, but the dothans are out of my $$ league at the moment and if id be able to use my old one id be insanely happy

Yes, he is completely correct.

The Sonoma (915) chipset in the T43 supports both 400FSB and 533FSB processors.

Furthermore, the odds of hitting 2.13GHz on a 1.6 GHz (400FSB) processor are in the neighborhood of 99%. The pinmod works great on those (assuming the 1.6 is a Dothan, of course).

#10 Post by **GomJabbar** » Mon Mar 06, 2006 7:13 am

Intel® Centrino® Mobile Technology
Compatible Chipsets

cmarti · #11 Post by **cmarti** » Mon Mar 06, 2006 7:40 am

Good luck try to it soon i am sure everyone is interested in your results!!

#12 Post by **jdhurst** » Mon Mar 06, 2006 8:44 am

I put a Dothan upgrade in my T41 18 months ago. It is surely do-able. For those about to embark, I made certain I cleaned the area thoroughly and used heat sink compound when replacing the CPU. Works just fine.
... JD Hurst

lithium726 · #13 Post by **lithium726** » Mon Mar 06, 2006 12:41 pm

just wondering, for those who have done this (im about too), what thermal material does IBM use?

I have my own, but id like to know what they use for warranty-related reasons for issues unrelated to the processor switch.

Furthermore, the odds of hitting 2.13GHz on a 1.6 GHz (400FSB) processor are in the neighborhood of 99%. The pinmod works great on those (assuming the 1.6 is a Dothan, of course).

If its the stock processor, its a Banias. the first Thinkpad with a Dothan was the T42. I wouldnt recommed attempting the FSB pinmod with a Banias, it likely would not hit 2.13ghz.

brentpresley · #14 Post by **brentpresley** » Mon Mar 06, 2006 12:50 pm

There is ZERO chance of the pinmod working on a Banias core processor. That speed is just way above their frequency ceiling.

I would highly recommend using Arctic Silver 5 as the thermal compound. If I remember correctly, IBM uses a thermal pad and the conductivity is not nearly as high as what a good thermal grease is. If you try it with a pad, you run the risk of the processor overheating.

Make no mistake, if you do this on a machine with any warranty left, you void it. IBM will be able to see if either the pad has been removed or you added any thermal grease to the HSF. Best to do this on a machine that has no warranty, or you don't care if you kill it.

lithium726 · #15 Post by **lithium726** » Mon Mar 06, 2006 12:54 pm

I have AS5, i also have a buttload of thermal material. a pad will not make the processor overheat, its just not as good of a thermal conductor. hell, my Banias max loads at ~50C, on a bed... these chips just dont put off much heat.

its also possible that IBM uses something like the shin-etsu pre-applied TIM on the HS assembly, much like AMD does on their retail HSF's, which is on par or better than AS5.

If you do it right, it is entirely possible to replace the CPU as if nothing happened. in any case, its only got a few months of warranty left, and just had a system board replaced. Ive also already changed the screen out, so any warranty returns will require some major disassembly

There is ZERO chance of the pinmod working on a Banias core processor. That speed is just way above their frequency ceiling.

eh, i havent looked at banias overclocks in a while... but its not impossible... its only ~400mhz above the highest clocked banias, and these things are pretty heavily volted... 1.5v is almost never needed to run stock speeds. might have better luck with a 1.4 or 1.5 though..

det922 · #16 Post by **det922** » Mon Mar 06, 2006 1:14 pm

i will try the mod ASAP( ill try it later when the t43p is finished being biult) but the 1.6 is a benias would it still work in the t43p board at 400mhz??

brentpresley · #17 Post by **brentpresley** » Mon Mar 06, 2006 1:15 pm

lithium726 wrote:I have AS5, i also have a buttload of thermal material. a pad will not make the processor overheat, its just not as good of a thermal conductor. hell, my Banias max loads at ~50C, on a bed... these chips just dont put off much heat.

its also possible that IBM uses something like the shin-etsu pre-applied TIM on the HS assembly, much like AMD does on their retail HSF's, which is on par or better than AS5.

If you do it right, it is entirely possible to replace the CPU as if nothing happened. in any case, its only got a few months of warranty left, and just had a system board replaced. Ive also already changed the screen out, so any warranty returns will require some major disassembly
There is ZERO chance of the pinmod working on a Banias core processor. That speed is just way above their frequency ceiling.
eh, i havent looked at banias overclocks in a while... but its not impossible... its only ~400mhz above the highest clocked banias, and these things are pretty heavily volted... 1.5v is almost never needed to run stock speeds. might have better luck with a 1.4 or 1.5 though..

Dude, I'm not quibbling w/ you.

My experience:
I've done about a dozen of these and can tell you for a FACT that without much better cooling than stock laptop cooling there is ZERO chance you will get a Banias above about 1.8GHz. In a desktop system you would need dry ice or LN to get a Banias core up to 2.13GHz. These are 130nm chips near the top of the speed bin to begin with. They just don't overclock.

As for the IBM TIM, the AS5 works much better. I consistently see 3-7 degree C drops at load after applying AS5 compared to the IBM TIM.

brentpresley · #18 Post by **brentpresley** » Mon Mar 06, 2006 1:16 pm

det922 wrote:i dont caree about the pinmod yet (although id try later) but the 1.6 is a benias would it still work in the t43 board?

Yes, the Banias will run just fine in a T43.

lithium726 · #19 Post by **lithium726** » Mon Mar 06, 2006 1:18 pm

ah, alrighty

was just conjecturing, kinda thinking out load - wasnt really trying to quibble

Interesting about the IBM TIM... id still like to know what it is though :-/ probably have to get in contact with an IBM repair guy though...

det922 · #20 Post by **det922** » Mon Mar 06, 2006 1:21 pm

so then now that im garranteed to go with ia benias in my mobo whats the chances of overclocking, with pinmod, or owuld there be any other ways?

brentpresley · #21 Post by **brentpresley** » Mon Mar 06, 2006 1:24 pm

det922 wrote:so then now that im garranteed to go with ia benias in my mobo whats the chances of overclocking, with pinmod, or owuld there be any other ways?

To the best of my knowledge, the only way to overclock on Pentium M based laptops is with the pin mod. And with that your ONLY options are stock (400MHz FSB) or 533MHz FSB.

Sorry, but you just won't be overclocking that 1.6 Banias.

det922 · #22 Post by **det922** » Mon Mar 06, 2006 1:27 pm

well hey as long as it works stock however im going to sell a t41 board and buy a dothan at 1.6(lot easier to get) with that and eventually a real proc like 2.13 (when i finally get money)

lithium726 · #23 Post by **lithium726** » Mon Mar 06, 2006 1:29 pm

well, if you get a 1.6 Dothan itll clock to 2.13 with the pinmod...

det922 · #24 Post by **det922** » Mon Mar 06, 2006 1:31 pm

what about stress levels and proc life owuld it be long lasting?

det922 · #25 Post by **det922** » Mon Mar 06, 2006 1:39 pm

and what whould battery life be like? any different then that of a real 2.13?

brentpresley · #26 Post by **brentpresley** » Mon Mar 06, 2006 1:49 pm

You will be ready for a new laptop before the processor burns out. As long as you properly install the chip (good contact w/ the heatsink, and sufficient AS5) you will have no problems.

You can expect about 10% or so less battery life. The other main draws on the battery are the screen, video card, and hard drive.

lithium726 · #27 Post by **lithium726** » Mon Mar 06, 2006 2:20 pm

det922 wrote:and what whould battery life be like? any different then that of a real 2.13?

itll be less than the stock clock speed, but the exact same as a true 2.13... same core, same voltage, same FSB, same thing.

in addition to this, overclocking only really starts shortening hte life of a processor when you start overvolting it, which you arent doing. it should last just as long as a true 2.13 would.

det922 · #28 Post by **det922** » Wed Mar 08, 2006 2:45 am

i posted something about this but noone respods and being you guys did b4 i needed ur help with this --->
my other big thing is the fan, i have my t41's fan and it works fine but my girlfriend has a t43 and the fan sounds complety different i was wondering would the t41 fan be ok in the t43? is Blietooth biult in to the t43p? ive heard some talk yes and no so id like to know the truth and because it was the t41 that went defective i wanted to use everything else (case, screen and such) the other worry is i heard that the intel prowireless 2100/3b would not work as well, i wanted to know what i would be up against because the motherboard is supposed to be here this week and id like to use as much as i can and know what i cant use, thanks

Aristotle11 · #29 Post by **Aristotle11** » Wed Mar 08, 2006 3:57 am

will that chip work on a formerly 1.4 Ghz X31?

cmarti · #30 Post by **cmarti** » Wed Mar 08, 2006 11:09 am

Aristotle11,

Yes the chip will work just fine. Just remember to update you BIOS to the latest available.

Dothan Cpu upgrade available

Dothan Cpu upgrade available

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