Buying MT40 Turion 64 from Newegg for HPDV5000z?

I've built many desktops before, installing a main processor is cake. But I've never done it on a notebook before. Obviously it can't be much different. Has anyone here tried just buying a notebook with a low end CPU such as the Sempron and then swaping it out for a higher one?

The reason being is because the MT40 uses 25W while the ML40 uses 35W. I wonder if the battery life will even be much better, it's probably not worth the trouble.

But this is just for curiosity, I doubt I will carry this out.

 

No one here has tried going from ML to MT processor in v2000z or dv5000z (v5000z). In principle it should work. Probably the BIOS would not support a MT chip but again it's not certain. There was one guy who upgraded his ML chip to MT but it was one of the business HP notebooks (nx6100, I think).
If you upgrade, you will probably have to use RMclock to set the voltage and the speed steps of the processor. However, if you simply undervolt your ML processor you will get very close or even better results than MT Turions.
Battery life will be longer but don't expect miracles because it is not the processor that wastes power. The problem with any current Turion system is that the chipset is not as power efficient as it could be. Undervolting adds some 10-15minutes, so I guess this would be the result with Turion MT.

 

Does undervolting destroy the speed of the notebook though? Buying the fasted Turion 64 HP offers would be pointless if I'm going to kill the speed.

 

Undervolting reduces the power supply to the CPU without affecting its computing power. For example, you will still have 1.8ghz of computing power but instead of running at 1.5v @ 1.8ghz you will run at 1.2v or less at the same speed. Result: less heat, more battery

 

But when it's plugged into an AC power source can the undervolting be turned off?

 

There's no point in turning undervolting off. AMD is very conservative with their default voltage settings. Undervolting just trims the voltage as far as the individual chip allows. I suspect that many of the recent ML chips could actually qualify as MT chips but HP only pays for ML's so that's what they're configured to be. Still, I'd bet on a MT chip undervolting a little better than a ML on average.

I'd be very surprised if a MT chip didn't work in the current HP Turion notebooks. The trick is getting to the CPU socket. HP has made it very difficult. Download the HP service guide for your notebook and see for yourself. I'm tempted to swap a MT40 into my new dv8125 (currently have a ML32, slower than I wanted but Best Buy's sale price was irresistable) but I just don't need the firepower badly enough to void the warranty yet. If AMD comes out with Socket 754 Turion dualcores though and HP adds BIOS support for them, well, my notebook is getting a visit from Mr. Screwdriver.

I have my ML32 set to run 1GHz at 0.9V and 1.8GHz at 1.25V. I could probably go lower but I didn't bother trying.

 

I completely agree with Brianstrech. There is no point in turning undervolting off. We are not/will not loose any performance by Undervolting( it is different from Underclocking).

Yes, I think AMD is very conservative about their rating.
I think average ML are better undervolters, because many/most ML series(ML-34 and below) able to achieve voltages below 1.2v. Many are able to do at 1.15v. So, it is almost like 0.3v drop, but where are best I have read for MT-34 is 1.1v( from 1.2V). And also many MSI notebooks with MT-37/MT-40 said, the least they could go is only 1.2v( yes, I thought default voltage), but it was mentioned default something like 1.3v( I donno why it would be).

But, anyways, all in all what I am trying to say is, it is not going to make much difference if you undervolt a ML series and it is not a big issue anymore as I thought originally.

And by the way ML and MT series both use 8 watts at 800Mhz( typicall when we run on battery), so it is not going to make much difference in battery life for typical browsing.

 

So the processor barely uses any of that power up. Yeah I'm probably going to get a DV5000z with ML-40.