swapping yonah with dothan / banias?

[holr]

can the yonah chip in a newer ibm be replaced with an older banias / dothan chip for cooler and quieter computing in a t43p?

[Troels]

What exactly do you mean ?

Do you want to replace the CPU in a T60(p) with a Dothan or Banias ? - then you can't, and you can't put a Yonah in a T4x either ( http://forum.thinkpads.com/viewtopic.ph ... ight=yonah ) since they are not pin-compatible, or use the same FSB.

[brentpresley]

Furthermore, why would you want to do that? Yonah is made on 65nm process and is cooler and gets longer battery life than Banias or Dothan.

[Zed]

Plus your T43p comes with Sonoma CPU and not Yonah...

Regards

[brentpresley]

Plus your T43p comes with Sonoma CPU and not Yonah...

Regards

Sonoma refers to the 533MHz platform, not the CPU specifically. It still uses a Dothan CPU (can accept either 400MHz or 533MHz FSB flavors of Dothan).

[bzzz]

Furthermore, why would you want to do that? Yonah is made on 65nm process and is cooler and gets longer battery life than Banias or Dothan.

haha. dothan is 90nm and should have been cooler and so compared to banias which is 130nm. but in the end, it's not.

[Troels]

Furthermore, why would you want to do that? Yonah is made on 65nm process and is cooler and gets longer battery life than Banias or Dothan.

haha. dothan is 90nm and should have been cooler and so compared to banias which is 130nm. but in the end, it's not.

So it's hotter ?
http://en.wikipedia.org/wiki/Pentium_M : " TDP is also down to 21 watts (from 24.5 watts in Banias), though power use at lower clockspeeds has increased slightly. However, tests conducted by third party hardware review sites show that Banias and Dothan equipped notebooks have roughly equivalent battery life."

Impressive how much is known about Yonah, when it's not even out yet.
Something doesn't make sense when people generally say the Yonah runs much cooler than the Dothan/Sonoma - yet: http://www.tomshardware.com/2006/01/16/ ... age23.html shows that this is not the case, although it was just a non-optimised setup (?)

[bzzz]

So it's hotter ?
http://en.wikipedia.org/wiki/Pentium_M : " TDP is also down to 21 watts (from 24.5 watts in Banias), though power use at lower clockspeeds has increased slightly. However, tests conducted by third party hardware review sites show that Banias and Dothan equipped notebooks have roughly equivalent battery life."

the problem is that you use a laptop, not a cpu. I don't claim intel lies about power consumption of dothan, but it seems one of bridges or new pci-e in sonoma platform is very hungry and sonoma-based laptops (t43, for example) have shorter battery life than previous T4x. FSB in new intel chipsets is higher than in sonoma, PCI-E is used again. so, I hope for the best, but I'm not sure yet it will run longer than T40, for example.

[holr]

Whoops, i meant swap out a sonoma cpu (the type that comes with the t43 systems) with an older banias (from say, a t41). I think I had the names mixed up! Is it possible, or are they not pin compatible?

[brentpresley]

Impressive how much is known about Yonah, when it's not even out yet.
Something doesn't make sense when people generally say the Yonah runs much cooler than the Dothan/Sonoma - yet: http://www.tomshardware.com/2006/01/16/ ... age23.html shows that this is not the case, although it was just a non-optimised setup (?)

It's impressive how little you know.

Yonah has been out for 3 weeks now. What do you think is running in the T60 and X60?

Here is a review from Anandtech:
http://www.anandtech.com/mobile/showdoc ... =2663&p=14

First paragraph should really catch everyone's eye:
"It’s tough to argue with the numbers - at worst, Intel’s Centrino Duo platform offers the same battery life as the previous generation Centrino, while outperforming it. But at best, Centrino Duo can not only offer better performance than last year’s notebooks, but also longer battery life."

[brentpresley]

Whoops, i meant swap out a sonoma cpu (the type that comes with the t43 systems) with an older banias (from say, a t41). I think I had the names mixed up! Is it possible, or are they not pin compatible?

You can do this, but again I really don't know why you would want to. If power consumption and heat generation is really a concern, then install something like Notebook Hardware Control and undervolt the processor. That will give you longer battery life and lower heat generation.

[bzzz]

You can do this, but again I really don't know why you would want to. If power consumption and heat generation is really a concern, then install something like Notebook Hardware Control and undervolt the processor. That will give you longer battery life and lower heat generation.

unfortunately, CPU isn't the only componenct that consumes power ...

[brentpresley]

You can do this, but again I really don't know why you would want to. If power consumption and heat generation is really a concern, then install something like Notebook Hardware Control and undervolt the processor. That will give you longer battery life and lower heat generation.

unfortunately, CPU isn't the only componenct that consumes power ...

Of course, but if he is swapping one out, it is the only component that is going to change.

[Troels]

Sorry to hi-jack the original poster's thread just like that, did just think there was an easy explanation to this.

What I meant: Intel can't address all orders on the Yonah, so you will still need to wait if you order a Yonah baed notebook. You don't have a T60,X60 or similar "Yonah" based laptop, neither do I, so everything is just words against words.....

That being said,
How to explain why Anandtech (and a few other review sites) like in the link you posted has a completely different result than Tom's hardware did ? That's all i'm asking!

[brentpresley]

Well, not to trash Tom, but I've found it not to be the best HW site to look for a "scientifically conducted" study. AT does a lot more controls for his experiments and is much more thorough. I wouldn't be surprised if it was just something as simple as not having a BIOS that recognizes the Yonah core and appropriately reduces the voltage.

Anyway, if you sit back for a minute and think about it, it just makes "sense" that a processor running on a smaller process technology, with the same basic pipeline design as Dothan (with maybe 1-3 more stages), and lower voltage, will consume less power. What is a bit surprising, is that it is efficient enough to overcome the power draw of having a second core on there. Now THAT is SWEET.

Addressing Yonah availability:
If you want Yonah now, you can always order a Dell E1705 (which have been shipping a little bit now. Estimated lead time is about 7-10 days). I'm sure that isn't most people's wish here (considering this IS a TP forum).

[bzzz]

Anyway, if you sit back for a minute and think about it, it just makes "sense" that a processor running on a smaller process technology, with the same basic pipeline design as Dothan (with maybe 1-3 more stages), and lower voltage, will consume less power. What is a bit surprising, is that it is efficient enough to overcome the power draw of having a second core on there. Now THAT is SWEET.

don't forget about new chipset and higher fsb. sonoma was an excellent example.

[holr]

So, if I was to say, take out the 2gig cpu in it now pentium-m 760 (i think) 533mhz fsb 27w Thermal Design Power and replace it with a pentium-m 755 2gig cpu 400mhz fsb 21w Thermal Design Power, this should be possible? Ok, will be taking a kick with the 400mhz instead of 533mhz, but it should be a cooler system right?

I tried undervolting my cpu already, getting about 47 celcius on idle. My old ibm t41p had about 40celcius idle.

[bzzz]

So, if I was to say, take out the 2gig cpu in it now pentium-m 760 (i think) 533mhz fsb 27w Thermal Design Power and replace it with a pentium-m 755 2gig cpu 400mhz fsb 21w Thermal Design Power, this should be possible? Ok, will be taking a kick with the 400mhz instead of 533mhz, but it should be a cooler system right?

let's just wait for flood of new laptops

[Rose]

So, if I was to say, take out the 2gig cpu in it now pentium-m 760 (i think) 533mhz fsb 27w Thermal Design Power and replace it with a pentium-m 755 2gig cpu 400mhz fsb 21w Thermal Design Power, this should be possible? Ok, will be taking a kick with the 400mhz instead of 533mhz, but it should be a cooler system right?

I tried undervolting my cpu already, getting about 47 celcius on idle. My old ibm t41p had about 40celcius idle.

*argghh* what i miss my old T41p. indeed it runned much cooler and QUIETER compared to my T43p.

[christopher_wolf]

Ehhh, I would still wait for the newer laptops like bzzz said; the circumstances under which a CPU swap would be beneficial are few and far between. Intel seems to be pretty good when it comes to designing low power chipsets that still pack a high clock speed.

Also, I have seen T40s and T41s perform quite well for most things; so then it becomes a matter of choosing the Thinkpad.