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Intel Pentium M 765 in T41

T40/T41/T42/T43 Series
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GColgrove
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Intel Pentium M 765 in T41

#1 Post by GColgrove » Wed Jul 13, 2022 8:11 am

I put a PM 765 (2.1 GHz) in my T41 and it would not boot. I have heard this processor works. I'm assuming that because the computer won't turn on the CPU is not working. Was there something I missed? I just took out the old CPU (1.7 GHz) and put in the new one.

TPFanatic
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Re: Intel Pentium M 765 in T41

#2 Post by TPFanatic » Wed Jul 13, 2022 9:44 pm

765 is a Dothan whereas the original 1.7 ghz is a Banias. I think you may have to update the T41's BIOS before you can use the Dothan.
lenovo T420 i5 2520m 16GB QHD, X330 i7 3615QE 16GB WQXGA, P71 i7 7700HQ 40GB 4K, and too many more...
Enable 2 finger scroll on old Synaptics touchpads.

kfzhu1229
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Re: Intel Pentium M 765 in T41

#3 Post by kfzhu1229 » Thu Jul 14, 2022 12:26 pm

TPFanatic wrote:
Wed Jul 13, 2022 9:44 pm
765 is a Dothan whereas the original 1.7 ghz is a Banias. I think you may have to update the T41's BIOS before you can use the Dothan.
1.6 and 1.7Ghz come in both Banias and Dothan flavours. If it had 1MB Cache it's Banias, 2MB is Dothan. But yes for Banias -> Dothan a BIOS update is necessary
GColgrove wrote:
Wed Jul 13, 2022 8:11 am
I put a PM 765 (2.1 GHz) in my T41 and it would not boot. I have heard this processor works. I'm assuming that because the computer won't turn on the CPU is not working. Was there something I missed? I just took out the old CPU (1.7 GHz) and put in the new one.
If after the BIOS update it still wouldn't work then you will have to check where you bought the CPU. There are a lot of fake CPU's for Pentium M 765 and you may find yourself falling into victim for one of them...
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 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)

GColgrove
Posts: 16
Joined: Sat Jun 18, 2022 9:55 pm
Location: Arlington, VA

Re: Intel Pentium M 765 in T41

#4 Post by GColgrove » Thu Jul 14, 2022 8:37 pm

I brought the BIOS down to 3.05 and the embedded controller down to 3.00. Then I reflashed both back to the latest. The CPU still didn’t work.

I got the CPU from China. Only place I could find the processor. It originated from Hong Kong.

I have pics of both sides of the chip but dont know how to post them.

The vender claims they tested the chip before sending it.

They put a Chinese symbol on the chip (in ink) for warranty purposes.

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Re: Intel Pentium M 765 in T41

#5 Post by TPFanatic » Thu Jul 14, 2022 9:05 pm

That CPU is probably bad then, sadly. They can die or be fake.
Merits of CPU upgrading aside, what I tried out and worked to speed up an R50p was getting an IDE to mSATA adapter and running an mSATA SSD, even TRIM worked on Windows 7.
lenovo T420 i5 2520m 16GB QHD, X330 i7 3615QE 16GB WQXGA, P71 i7 7700HQ 40GB 4K, and too many more...
Enable 2 finger scroll on old Synaptics touchpads.

kfzhu1229
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Re: Intel Pentium M 765 in T41

#6 Post by kfzhu1229 » Thu Jul 14, 2022 9:46 pm

GColgrove wrote:
Thu Jul 14, 2022 8:37 pm
I brought the BIOS down to 3.05 and the embedded controller down to 3.00. Then I reflashed both back to the latest. The CPU still didn’t work.

I got the CPU from China. Only place I could find the processor. It originated from Hong Kong.

I have pics of both sides of the chip but dont know how to post them.
If you don't have things like imgur, try uploading them to a cloud service like google drive or onedrive and just share us the link.
I also would like to see the exact listing you purchased it from on eBay.
Not all Chinese sellers sell fake CPU's. I have my whitelist of sellers that always send me working CPU's. I usually see all the neutral and negative feedbacks of a seller's profile to see if there are any evidence of scam. Ignore the comments made by buyers with unreasonable expectations of course, but if you see a Core 2 duo T7600 listing with a negative feedback saying the CPU does not work for instance, that would be a red flag.
If by the end of the day that CPU turned out to be fake and then you got your money back, I would recommend you a Pentium M 755, or if you can get ahold of a Pentium M 725 (1.6Ghz, 2M, Dothan), get that and overclock its FSB to 533Mhz, and that will give you a cheap and effective processor that will outperform a Pentium M 765. You can do the same with your 1.7Ghz chip if it's a Dothan Pentium M 735 but you may need to overvolt it.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 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)

GColgrove
Posts: 16
Joined: Sat Jun 18, 2022 9:55 pm
Location: Arlington, VA

Re: Intel Pentium M 765 in T41

#7 Post by GColgrove » Thu Jul 14, 2022 10:16 pm

Here is the top side:

https://share.icloud.com/photos/0b0MaG9 ... 5AzF4irkwA

This is the pin side:

https://share.icloud.com/photos/033U-Uz ... UwqTJ4tHcw

This is the listing:

https://www.ebay.com/itm/282513151994?m ... media=COPY

I don’t think I can clock up a Thinkpad t41.

I gave up on the 2.1 ghz 765. I ordered a 2.0 ghz 760. People said there wasn’t much difference anyway.

My current processor isn’t the Dorthan version of the 1.7 ghz.

kfzhu1229
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Re: Intel Pentium M 765 in T41

#8 Post by kfzhu1229 » Thu Jul 14, 2022 10:50 pm

GColgrove wrote:
Thu Jul 14, 2022 10:16 pm
https://www.ebay.com/itm/282513151994?m ... media=COPY

I don’t think I can clock up a Thinkpad t41.
Refund the CPU immediately. eBayer gift.for.today is on my blacklist for selling fake CPU's as I observed with the negative feedbacks and how sometimes they offer prices that are too much cheaper than the competition.
Well if you order the Pentium M 760, unfortunately you are forced to clock up the FSB... If you don't, the Pentium M 760 will run at a mere 1.5Ghz! This is because all the Pentium M 7x0 chips are 533Mhz FSB chips, and 7x5 chips are all 400Mhz FSB chips.
For you to overclock the FSB to 533mhz, it is more involved than the case with getting Pentium M 7x0 to run on 533Mhz on T43.
You will need to first find 333Mhz or 400Mhz DDR RAM sticks, with at least one being SPD unlocked, then modify the SPD using SPDTool, and then move a resistor across on the motherboard, which tricks the clock generator into giving 533Mhz FSB signals.
But then after you successfully performed this trick, you can make do with the much cheaper Pentium M 725 and enjoy 2.16Ghz of clock out of it!
P.S. If you go for a CPU that's not worth much money at all, it is unlikely that you will receive a fake CPU even from shady sellers, but rather sometimes you can get things like BGA479 converted chips with solder balls replaced with pins.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 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)

GColgrove
Posts: 16
Joined: Sat Jun 18, 2022 9:55 pm
Location: Arlington, VA

Re: Intel Pentium M 765 in T41

#9 Post by GColgrove » Fri Jul 15, 2022 3:33 am

Yup, looks like I did a boneheaded move on the 760. I should have ordered the 755. I didn’t pay that much for the 760. I paid $10 for the 760 (inc. shipping). If it works, I can sell it and get my $$ back.

I won’t be doing any overclocking. I’ll just have to order the 755 or get another 765 from a reputable seller.

What China dealers have you whitelisted?

Thank you for your help. Greatly appreciated.

kfzhu1229
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Re: Intel Pentium M 765 in T41

#10 Post by kfzhu1229 » Fri Jul 15, 2022 1:12 pm

GColgrove wrote:
Fri Jul 15, 2022 3:33 am
Yup, looks like I did a boneheaded move on the 760. I should have ordered the 755. I didn’t pay that much for the 760. I paid $10 for the 760 (inc. shipping). If it works, I can sell it and get my $$ back.
Pentium M 760 will definitely work on the T41, just at 1.5Ghz, so that would enable you to see if it fully works and then sell it.
Here is one from a seller that I bought Core 2 duo T8300's from that turned out to work: https://www.ebay.ca/itm/131747607411?ha ... SwyjBW4F1P
I am hoping that you will get a real CPU from this too as to no pleasure I am gonna have to tell you this is more than 5 times the price I've paid for in 2020! I paid £5 per piece back then! I have no clue why something this old inflates in price so much but it is what it is.
This definitely incentifies me to keep doing the FSB mods instead of getting more of these overpriced chips...
Alternatively, here is a Pentium M 745 also from a seller that I bought from previously: https://www.ebay.ca/itm/272332204058?ep ... SwCCVdXetL
This price is much more reasonable.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 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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