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T42 CPU upgrade

T40/T41/T42/T43 series specific matters only
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RolfThinkPad
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T42 CPU upgrade

#1 Post by RolfThinkPad » Thu Dec 12, 2013 6:43 am

Hi,
ThinkPad T42 1.7GHz Pentium M

Does anyone know if the processor can be easily upgraded to 1.8 GHz, or even 2.0 GHz?

It must be a straightforward processor swap with zero other hardware issues.

RealBlackStuff
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Re: T42 CPU upgrade

#2 Post by RealBlackStuff » Thu Dec 12, 2013 6:51 am

Anyone of these will work:
Pentium M 710 	SL7V5  	1400 MHz 
Pentium M 715 	SL7GL  	1500 MHz 
Pentium M 725 	SL7EG  	1600 MHz 
Pentium M 735 	SL7EP  	1700 MHz 
Pentium M 745 	SL7EN 	1800 MHz 
Pentium M 755 	SL7EM 	2000 MHz 
Pentium M 765 	SL7V3  	2100 MHz
Make sure you clean up/replace the thermal paste between CPU and fan.
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Re: T42 CPU upgrade

#3 Post by Johan » Thu Dec 12, 2013 12:51 pm

Rolf:

If you seek to "speed up" your T42, then I suggest that you (if you haven't done it already?) rather upgrade your old, slow mechanical rotating harddrive to a fast SSD, in stead ... as this upgrade will give you a much more speedy T42, compared to upgrading the CPU. If you wish to read more about SSD's in T42's, I suggest you see the sticky GUIDE: Make your T4x *FAST* by replacing the HDD with a SSD! and the threads linked to therein... all you'll need to know is there!

The ultimate speed-upgrade of your T42 (unless upgrading the motherboard itself to one of the hopefully forthcoming nb51.com "T50" motherboards, which is beyond the scope of this thread to discuss) would be to both replace the (old, slow!) HDD with a SSD and upgrading the CPU at the same time! :-)

Good luck with the project! :thumbs-UP:

Johan
IBM T42p's (2373-Q1U & -Q2U): 2.1 GHz, 15" UXGA FlexView, 2 GB RAM, 128 MB FireGL T2, 128 GB 1.8" SATA SSD, IBM a/b/g, BT, Win 7 Ultimate
IBM T42 (2373-N1G): 1.8 GHz, 15" SXGA+ FlexView, 2 GB RAM, 64 MB Radeon 9600, 64 GB 1.8" SATA SSD, IBM a/b/g, BT, Win 7 Ultimate

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Re: T42 CPU upgrade

#4 Post by sktn77a » Thu Dec 12, 2013 8:52 pm

The 1.8Ghz upgrade isn't worthwhile. The 2.0GHz upgrade will yeild about 20% improvement in CPU intensive tasks. I upgraded my T42 from 1.6 to 2.0 and did notice a difference but I think the money is better spent on a bigger, faster HDD and 2Gb RAM. And by the time you have done that, you could have probably sold the T42 and bought a more modern laptop (the T4x was very good in its day but it is a 10 year old design now).
Keith
(Formerly 600E, T40, T41, 2xT42, 2xT61p, T420
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RolfThinkPad
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Re: T42 CPU upgrade

#5 Post by RolfThinkPad » Fri Dec 13, 2013 6:04 am

Thanks all.

I was only thinking about the CPU because I need to replace the fan soon, and so need to separate the heatsink from the CPU and GPU anyway.

I also see that my CPU has 2MB level 2 cache which makes a big difference over 512K cache versions.

My T42 has maximum RAM (2GB) with a good GPU and is fast, especially as I've tuned XP by getting rid of all the excess nonsense that drags systems down. Let's just say the T42 is "travelling light". Indeed I get comments even in 2013 that my laptop is so fast!

Re. hard disk, I replaced the standard disk with a brand new higher performance model, but still IDE, and noticed a big difference. The new disk has 4 times more cache plus other improvements. For me it is plenty fast.

Thanks for all the input.

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Re: T42 CPU upgrade

#6 Post by Twiggy » Tue Apr 21, 2020 1:57 pm

I realize I am resurrecting a dead post, but I found this while googling and I thought it'd be better to ask here than to start another thread.

I found a Penitum M 760 2.0ghz being sold on ebay for $9.99 Canadian from my country with free shipping, it's not quite as fast as the 765 which is 2.1ghz, but 100mhz doesn't make much difference in practice and the 765 seems to cost $45 Canadian, so the 760 to me seems to have much better price to performance, therefore make more sense.

However I do not see the 760 on the list that RealBlackStuff provided in a reply, so before I go ahead and buy the 760, will it work in the T42?
Last edited by Twiggy on Tue Apr 21, 2020 2:20 pm, edited 1 time in total.

ajkula66
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Re: T42 CPU upgrade

#7 Post by ajkula66 » Tue Apr 21, 2020 2:12 pm

Twiggy wrote:
Tue Apr 21, 2020 1:57 pm

However I do not see the 760 on the list that RealBlackStuff provided in a reply, so before I go ahead and buy the 760, will it work in the T42?
It will work, but at a lower-than-advertised speed given that it's 533Mhz and not 400Mhz as required by T42. In other words it won't be an upgrade.

My experience has been that 735 and 745 are optimal CPUs for these systems. Not knowing what you currently have I can't say much more, but unless your T42 is one of the very first models sporting a Banias CPU, I'd likely leave it "as-is".
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Re: T42 CPU upgrade

#8 Post by Twiggy » Tue Apr 21, 2020 2:17 pm

Mine has the 735, 1.7ghz.

So I guess it's either don't upgrade, or go for the 765 then.

Originally I was not planning on upgrading mine at all, however from a guide I watched removing the keyboard which is easy, gives you access to not just the ram, but the cpu as well, making upgrading both easy as well. I found affordable Kingston pc2700 333mhz 2x1gb ram on ebay and bought it, so I will be needing to remove the keyboard anyways, figured I might as well upgrade the processor in that case if I can find an affordable one to upgrade with.
Last edited by Twiggy on Tue Apr 21, 2020 2:26 pm, edited 1 time in total.

ajkula66
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Re: T42 CPU upgrade

#9 Post by ajkula66 » Tue Apr 21, 2020 2:26 pm

Twiggy wrote:
Tue Apr 21, 2020 2:17 pm
Mine has the 735, 1.7ghz.

So I guess it's either don't upgrade, or go for the 765 then.
I'd stay with 735. Performance upgrades are meaningless on a 15-year-old platform. Not to mention that 765 is a hot-running-beast when pushed hard enough.

My $0.02 only...
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

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FlexView AARP club members:A31p, T43pSF

Abused daily: T520, X200s


PMs requesting personal tech support will be ignored.

Twiggy
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Re: T42 CPU upgrade

#10 Post by Twiggy » Tue Apr 21, 2020 2:30 pm

ajkula66 wrote:
Tue Apr 21, 2020 2:26 pm

I'd stay with 735. Performance upgrades are meaningless on a 15-year-old platform. Not to mention that 765 is a hot-running-beast when pushed hard enough.

My $0.02 only...


You're probably correct there, the 765 would cost me $46 so it doesn't seem worth it, however if the 760 would work at the advertised speed, I'd go for it for only $10.

kfzhu1229
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Re: T42 CPU upgrade

#11 Post by kfzhu1229 » Tue Apr 21, 2020 2:42 pm

Twiggy wrote:
Tue Apr 21, 2020 2:17 pm
Originally I was not planning on upgrading mine at all, however from a guide I watched removing the keyboard which is easy, gives you access to not just the ram, but the cpu as well, making upgrading both easy as well. I found affordable Kingston pc2700 333mhz 2x1gb ram on ebay and bought it, so I will be needing to remove the keyboard anyways, figured I might as well upgrade the processor in that case if I can find an affordable one to upgrade with.
I need to give you a warning here, if you bought RAM from China for dirt cheap like I did, chances are they are fake Kingston. I bought a pair of 1gb pc2700 advertised as crucial ram but they have hynix chips - no genuine crucial ram have hynix chips. Opening up CPUz reveals they are from Adata. So they most likely will work fine, but dont really believe it is really from Kingston.
And again, Pentium M 735 is a perfectly good cpu for such a machine, upgrading to a Pentium M 765 wont be as good of an upgrade as you might think. Sure intel listed them as the same TDP, but intel is known to play around with the tdp numbers for their high end CPUs to look attractive. The 533Mhz Sonoma chips run even hotter (especially the 770 and 780, as I have the latter in my T43p) and at that point you might even need to replace the heatsink with a T43 one with extra RPM to cool it properly.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Lat D830 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

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Re: T42 CPU upgrade

#12 Post by Twiggy » Tue Apr 21, 2020 2:58 pm

Fortunately, I have no reason to believe it is fake ram, as it's from a seller here within Canada, and not China. I try to avoid buying from China if at all possible.

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Re: T42 CPU upgrade

#13 Post by Droider » Tue Apr 21, 2020 3:25 pm

PM755 over PM735 was a worthy upgrade for my old T40. Running 3-5 degrees warmer, didn't really matter cause 1.7ghz werent running ice cold either. :D
Everyday tp ; T440p, i7-4700mq, 1080p lg panel, 16 gb, 500gb 860 evo, intel 4600 gpu
Spare wheel : T400, C2D T9600, 14.1 wxga led, 8 gb, 120gb 850 evo, switchable & ati 3470
My Thinkpads at the moment
T42P UXGA, T43 14.1" X300, T43 14.1" gma900, X60s, X61 T8300, X32, T23..

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Re: T42 CPU upgrade

#14 Post by Twiggy » Tue Apr 21, 2020 3:49 pm

Thanks for mentioning the 755, I forgot that was on the list and 2,0ghz as well. I looked it up on ebay, and they are available for under $15 Canadian, so I am going to buy one.

w0qj
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Re: T42 CPU upgrade

#15 Post by w0qj » Fri May 01, 2020 1:11 pm

Should you choose to upgrade your T42 to SSD, just be sure that you order a Parallel ATA (PATA) interface SSD!

It's rather difficult to find nowadays. ymmv
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Re: T42 CPU upgrade

#16 Post by dr_st » Sat May 02, 2020 6:11 am

w0qj wrote:
Fri May 01, 2020 1:11 pm
Should you choose to upgrade your T42 to SSD, just be sure that you order a Parallel ATA (PATA) interface SSD!

It's rather difficult to find nowadays. ymmv
The more common approach is a SATA/M.2 SSD and an adapter to IDE.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

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Re: T42 CPU upgrade

#17 Post by Droider » Sat May 02, 2020 6:26 am

My apprroach is to buy 5 usd msata to 44pin ide adapter and stick a 10 usd 32gb msata ssd on it. Costs next to nothing and 32gb is plenty for xp, 2000, 98 or small linux
Everyday tp ; T440p, i7-4700mq, 1080p lg panel, 16 gb, 500gb 860 evo, intel 4600 gpu
Spare wheel : T400, C2D T9600, 14.1 wxga led, 8 gb, 120gb 850 evo, switchable & ati 3470
My Thinkpads at the moment
T42P UXGA, T43 14.1" X300, T43 14.1" gma900, X60s, X61 T8300, X32, T23..

hiero
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Re: T42 CPU upgrade

#18 Post by hiero » Sun Nov 15, 2020 11:09 pm

In process of a full makeover of my partner's T42 as she often needs 2x laptops when working on technical translations and XP GOOGLING becoming unworkable. So have installed Win7 pro, on an 80gb hdd, maxed out the ram to 2gb and tweaked the DNS to faster servers and is great, but as the upgrade cost so far is only £11 for these items new (!) I haved pushed the boat for a 128gb mSata and pata caddy interface and a 755 cpu for just another £23 the lot!

Looking forward to the new parts coming now.

cadillacmike68
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Re: T42 CPU upgrade

#19 Post by cadillacmike68 » Mon Nov 16, 2020 12:26 am

What google won't run on an XP system now? What's wrong with those morons. Then use duck duck go.
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Re: T42 CPU upgrade

#20 Post by dr_st » Mon Nov 16, 2020 2:54 am

Google (the core search engine) works even on Windows 98.
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X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

kfzhu1229
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Re: T42 CPU upgrade

#21 Post by kfzhu1229 » Mon Nov 16, 2020 11:58 am

In my opinion Pentium M 755 is a great upgrade. I got 3 of these CPU's for like C$2-3 each after postage and it was a pretty good deal for me.
But, locally I found a Pentium M 765 for C$20 and I think I had just burnt it on the spot when I was testing it! :oops:
Also, if you really wanted to, you can crank up the clock speed even more by using SetFSB if you don't have the ICS clock generator
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Lat D830 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

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