TM8215: how to lower voltage?

Hello,
I'm happily using a TM8215 (after a full reinstall of XP) and I'm satisfied of almost all its aspects and features.

My biggest concern is about its minimum frequency / voltage / TDP.

The problem is that at 1000MHz (minimum frequency and multiplier) I can't reduce voltage below 0.950V, even if I'm sure it would run smoothly down to 0.7-0.8V. In fact, using NHC (great program!) I was able to confirm that processor at full speed (2GHz) is perfectly stable down to 1.000V.

Therefore, even when doing almost nothing (usually 3-5% of CPU load), there is some heat production and fan running. With my previous Centrino 1.6GHz, I was able to set it at [email protected] to run completely fanless and noiseless.

By some search on the net, it seems that lowest voltage and multiplier are locked, so I can see only one of following solutions:

1) reduce FSB by some overclocking program (I need to know PLL code)
2) reduce multiplier/voltage with some other (future?) tweaking program
3) use a modded BIOS
4) hardware mod on the motherboard/processor

Any idea/information about that???

 

The first person who can figure out how to unlock that 0.95V stands to become very popular. I totally agree that 0.95V is unnecessarily high.

My suspicion is that Intel wanted to protect the market segment for lower power CPUs. However, I'm baffled because the only two low (not ultra-low) power C2D parts listed by Intel are the L7200 and L7400, running at 1.33 and 1.50GHz have only been listed for a few months and I haven't seen them in any notebook specs. Intel also lists L2300, L2400 and L2500 CD parts at 1.50, 1.66 and 1.83GHz.

The C2D data sheet shows that the L7200 and L7400 draw significantly less power in the various idle states and I would have thought there would be a substantial market for people willing to pay a small premium for battery battery life, plus silence during light usage.

John

 

Have you tried with RMClock ?

 

Yes, but I found it unable to overcome such limitations.

As John said, let's hope some one is able to find to right way....

 

yup, you can't undervolt the new Intel CPUs at the lowest multiplier, which is a shame. even the dude that made RMClock said it was some kind of hardware lock or something. u would need a mod for the BIOS to modify it. something i don't wanna be a guinea pig for just yet.
as far as anybody knows, its really really REALLY hard to do. and the risk may be huge, thus the reason why in over a year since the initial Core Duo i havn't read anything about it.