"Dothan". Making the switch from "Banias"

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Dead1nside · #1 Post by **Dead1nside** » Mon Jul 31, 2006 11:23 am

Hi, I'm getting a T41p with a 1.5Ghz Pentium M "Banias". I'd like to upgrade this, to a 2.0Ghz "Dothan" cored model.

Has anyone made the switch from Banias to a relativley similiar clocked Dothan, or even not similarly clocked. What was your impression? In performance and battery life?

Do the Dothans carry a higher TDP and voltage requirement and therfore a bigger power drain? As I thought the moving to 90nm would have kept the power requirements roughly the same. Am I wrong?

Thanks for any replies.

cmarti · #2 Post by **cmarti** » Mon Jul 31, 2006 12:12 pm

The performance gain depends on the applications you use, But yes there will be beter battery life with the dothan.

You will be pleased with the upgrade.

Dead1nside · #3 Post by **Dead1nside** » Mon Jul 31, 2006 12:19 pm

Thanks for the reply. Someone raised an issue of in fact increased heat from their lower clocked Banias cored CPU. Is this the case?

Or are they actually relativley similar in their CPU temperatures?

Would better cooling be needed? Is there any available.

Thanks.

#4 Post by **jdhurst** » Mon Jul 31, 2006 1:51 pm

I combined a Dothan upgrade with a faster hard drive. I am pleased with the result; I don't see any extra heat; and I don't think I get longer battery life (my battery is getting old in addition).
... JD Hurst

Dead1nside · #5 Post by **Dead1nside** » Mon Jul 31, 2006 2:33 pm

Thanks for that, it's really helping to get a general overview of people's experience with the Dothan upgrade.

cmarti · #6 Post by **cmarti** » Mon Jul 31, 2006 2:45 pm

If you are going to upgrade to 2.0 why not go for 2.10?

Price difference is not that much between them.

Here is one on Ebay

Ahh.. And do not forget to use artic silver 5 to ensure proper cooling for the new cpu.

Dead1nside · #7 Post by **Dead1nside** » Mon Jul 31, 2006 2:53 pm

Ah thanks for this. I hadn't been aware of the 765 model. I will look around for these, but they're quite hard to find here in the UK. Is this the highest clock speed 400FSB model?

I've got some Arctic Silver 5 left over from a CPU installation a few months ago. What do you use to clean the CPU, ready for some fresh thermal paste?

May I ask what model you upgraded to, and what model you upgraded from? Thanks.

cmarti · #8 Post by **cmarti** » Mon Jul 31, 2006 7:09 pm

quote="Dead1nside"]Ah thanks for this. I hadn't been aware of the 765 model. I will look around for these, but they're quite hard to find here in the UK. Is this the highest clock speed 400FSB model?

In my second message is a link for a 765 that is on ebay you can bid on that one. ( cheap )

I've got some Arctic Silver 5 left over from a CPU installation a few months ago. What do you use to clean the CPU, ready for some fresh thermal paste?

I used alcohol and a q-tip and some blow off.

May I ask what model you upgraded to, and what model you upgraded from? Thanks.

First i did the upgrade from banias 1.5 to dothan 1.8 and then to dothan 2.10 and like jdhurst mention it is recommended to also upgrade your hd to a 7k100 drive with these two upgrades you will really feel the difference in performance you can get ithe drive for 145.00usd on newegg.com

Good luck!

skygodtj · #9 Post by **skygodtj** » Tue Aug 01, 2006 1:32 am

In keeping with upgrading... what upgrades are available for a 2373-8CU 1.5GHz T40? It has 512MB RAM, I'm considering bumping it to 1GB. What mobo or cpu swaps are avail for this?

Thanks

TJ

Dead1nside · #10 Post by **Dead1nside** » Tue Aug 01, 2006 1:53 am

Thanks cmarti.

As for you skygodtj, I think that there's just about as many upgrades for you as for me. The T40, T41 and T42 motherboards are all pretty similiar to my knowledge. And surely through BIOS updates you'll be able to put better CPUs all the way up to the Pentium M 765.

RAM you can install 2GBs probably, and you can always put a 100GB 7200RPM hard drive in.

skygodtj · #11 Post by **skygodtj** » Tue Aug 01, 2006 2:05 am

Thanks for the info.. I'll start looking around for the processors, and RAM.. I've already got an 80GB 5400rpm drive coming..

tj

mrpaulin · #12 Post by **mrpaulin** » Tue Aug 01, 2006 3:37 pm

The 765 is the fastest Pentium M you can get with 400MHz FSB.
I upgraded my T41 from 1.6GHz Banias to Pentium M 765, and I used MobileMeter to track temperatures before and after. The 765 runs about 2 celsius degrees warmer at idle than the Banias did (57-vs-55) and about 4 celsius degrees hotter at maximum load (86-vs-82). I rarely use the system on battery power, so I can't comment on that. The machine is much more responsive than it was prior to the upgrade, especially when running VMware virtual machines. I had already upgraded the RAM from 1GB to 2GB, but the CPU upgrade made a bigger difference in performance than the RAM upgrade did.

Dead1nside · #13 Post by **Dead1nside** » Tue Aug 01, 2006 6:31 pm

Thanks for that information. I think the 2.0Ghz will suffice for me.

skygodtj · #14 Post by **skygodtj** » Tue Aug 01, 2006 6:32 pm

I finally found the spec sheets from the T40 (bus speed, cpu type, etc) in the Hardware Maint manual. I was disappointed to find it was not in ANY publications/overview/user manual/product or detailed info sheets like the older models (T2x, 600/770, etc).

Sorry for the questions, but my T4x learning curve is vertical.. 600/770's and T2x, I'm good, T4x, I'm an infant..

editted-

Finding the bus speed, lets me search for cpu's.. If I understand correctly, the Banias-core(400mhz bus) are 1.4 to 1.6ghz cpus, while the dothan-core (t41/42) are 1.4 to 2.1ghz..

As long as I, update the BIOS, stay with the 400mhzFSB 478(479) pin package, and utilize the appropriate fan (T41/42), I should be able to bump up to a Dothan 1.6ghz (725); 1.7 (735), 1.8 (745), 2.0 (755) or 2.1ghz (765), 478(479)pin pkg cpu without changing anything else?

Are the 64 and 128MB VidRAM mobo's tough to come by?

teege

Dead1nside · #15 Post by **Dead1nside** » Tue Aug 01, 2006 7:31 pm

I'm not sure about the T40 boards but as for the T41 and T42 (including "P") you can use any Pentium M from 1.5Ghz Dothans all the way to the 2.1Ghz Pentium M 765. This is with BIOS updates of course.

I am unaware of the video cards that come with these Dothan motherboards, I think what you are referring to is the Sonoma boards for the T43. Which with them bring an increase in bus speed from 400Mhz [T40,T41,T42] to 533Mhz [T43]. Sonoma is not the core name for a chip like Banias and Dothan. But a new platform with chipset, processor etc.

At least this is to my knowledge.

skygodtj · #16 Post by **skygodtj** » Tue Aug 01, 2006 11:16 pm

I also see quite a few non-centrino chips, going -really- cheap... a 2GHz 400FSB chip for $10, and no one is bidding on it, it ends in 4 minutes.. Will these non-centrinos work, and are they any good?

Dead1nside · #17 Post by **Dead1nside** » Wed Aug 02, 2006 7:22 am

Centrino isn't a chip name or characteristic it refers to a plaform. Of three things: pentium m processor, Intel wireless networking card and intel chipset. Then a laptop can be called centrino.

I don't know what chips you're looking at, do you mean Celeron? The cut down lower cache chips? Look at the manufacturing process? Banias is 130nm and Dothan is 90nm each has 1MB and 2MB L2 Cache respectivley.

Dead1nside · #18 Post by **Dead1nside** » Wed Aug 02, 2006 6:38 pm

Can one put a FSB 533Mhz Dothan into a 400Mhz FSB motherboard?

_erazor_ · #19 Post by **_erazor_** » Wed Aug 02, 2006 7:28 pm

I think that works but it will run underclocked as the clock multiplier stays the same.

Dead1nside · #20 Post by **Dead1nside** » Thu Aug 03, 2006 1:57 am

Thanks, you're the second person who has said that. Can anyone confirm this, please?

skygodtj · #21 Post by **skygodtj** » Thu Aug 03, 2006 9:23 am

The chips are only 512kb cache.. Here's one, a 2.0ghz cpu for an A31:

http://cgi.ebay.com/Intel-Pentium-4-M-2 ... 0012987020 It's specs:

Processor type Intel Mobile Pentium 4-M

Package type 478-pin Micro-FCPGA
Processor speed (GHz) 2.0 / 1.2
Bus speed (MHz) 400
L2 cache size (KB) 512
Qualification sample QRR1
Previous stepping SL6CL
Next stepping QVR8
Manufacturing technology (micron) 0.13
Core voltage (V) 1.3 / 1.2
Case temperature (°C) 100
Core stepping C1
CPUID 0F27h

A whole list of them:

http://search.ebay.com/search/search.dl ... +-centrino

Centrino tag (chipset, cpu & wifi) benefit better performance and great battery life, these others dont.. Anyone gone this route yet with a Tseries?

Dead1nside · #22 Post by **Dead1nside** » Thu Aug 03, 2006 9:30 am

I am guessing that these are not the Pentium Ms but the Mobile Pentium 4s. I'm not sure how much an impact this will have on performance. But I believe that battery life will be negativley impacted due to the more dekstop nature of the chip's design.

skygodtj · #23 Post by **skygodtj** » Thu Aug 03, 2006 9:38 am

Kinda thot so.. I didnt look at the package to see if it was the same as the T4x's.. they did say they were 478(479) pin tho.. Thanks..

teege

mrpaulin · #24 Post by **mrpaulin** » Thu Aug 03, 2006 3:23 pm

"Mobile Pentium 4-M" and "Pentium M" are different processors with different microarchitectures.
They are NOT pin-compatible -- if they were, I would upgrade my A31p immediately.

RoadHazard · #25 Post by **RoadHazard** » Sat Aug 05, 2006 2:58 am

The Dothan chips will work on T40/p no problem (see sig). However, if you use a 533Mhz chip, you still get the same multiplier but it will run at 400Mhz bus speed. That means you won't get the advertised speed. For example, P-M 780 (2.26GHz @533) will run at only 1.7GHz@400 in a T40.

Dead1nside · #26 Post by **Dead1nside** » Sat Aug 05, 2006 5:31 am

Well the 770 etc. all the 533Mhz chips actually seem to be cheaper than their 400Mhz brethern. Thanks for the confirmation of this.

"Dothan". Making the switch from "Banias"

"Dothan". Making the switch from "Banias"

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