Undervolting

Hello,
I've read some posts on the forum but i didn't find interesting me aspect... Is any possibility to undervolt Core 2 Duo on HEL80 lower than 0.950v? RmClock can't do this... I've upgraded bios, drivers...

 

What c2d you have? Mine is T7300 and was able to lower voltage to 0.937 with RMclock

 

Please do tell how you did this. As far as I know, all of the Core chips have a locked lower multiplier at .95V

 

The minimum voltage is hard coded into the CPU during manufacture and some people are luckier than others with what they have got.

My T7300 is 1.0V @ 1.2GHz and 0.9V @ 800MHz (use CPU-Z to see this - it is actually 8x + half speed FSB).

John

 

The build of RMclock is 2.30
I selected mobile cpu manually in Advanced CPU settings. And then I was granted with 0.937v in every multiplier.

 

I have C2D 7200... And I think it could run x6 at 0.7v... if i can do this... Also which pll has HEL80 because I want to try increase Fsb using spedfsb

 

Like Ratsey said, you can't lower the VID past what intel sets it for at the factory. My lowest is .95, and I can run my processor at full speed at that voltage.

 

Ok, but what about changing fsb? Must be possibility to rise above standard... This processor has a lot of potential... Decreasing voltage and increasing fsb leaves heat at normal level but pushing speed up...

 

Keep in mind that T7300 should make 800Mhz at 0.85v, that is directly w/o RMClock, you're overvolting. I found that RMClock and NHC aren't supporting Santa Rosa good enough (yet) , I received different voltage readings from each version of RMClock (2.25 vs 2.3), CPU-Z (1.36 vs 1.4) and NHC (0.6). Latest versions from each of them don't match either.
I don't know what reading to trust so I will be waiting for better platform support before trying again.

 

I'm not overvolting my T7300. I've just got one that Intel decided to set at 1.0V. Previous generations of Core series CPU were set to 0.95V but the Santa Rosa CPUs seem to to be coded with different minimum voltages in the range 0.90 to 1.0V, plus a 800MHz mode which appears to be 0.1V lower.

John

 

But RMClock does not make it to that 800Mhz 0.85v state...right? That is were you're losing some battery time using 0.9v
I don't think same CPUs are coded with different voltages...I believe is the readings that are different because of Santa Rosa being new.
Lowest voltage I get from RMClock is 0.937v , but again, it depends on RMClock version which voltage min-max I get.

 

it is possible to go down below 0.9

but I can't go dow'n below 1200mhz(800mhz needed)

 

Even if you enable the UnlockVid you cannot go below the lowest (hardcoded) vid for your specific processor. My processor runs at .95v, someones may run at .8 but that means nothing. Intel takes the time to test the processors and assign them a VID range along with their hard coded max multiplier. There is nothing you can do to change this.

 

One silly question: Does a Santa-Rosa CPU (7300) make sense on a non-Santa-Rosa HEL 80?
I've read about these combination in this thread two or three times ... the chipset isn't able to use the Santa-Rosa features, isn't it?

greets!

 

It's a different socket type altogether, so it won't work.

 

You guys are right. With RM Clock you can not get the 800MHZ mode, but I am able to run my T7300 @ 2.0GHZ and .95 volts Prime Stable My Full load temp dropped 13C and thats with stock thermal grease. Just wait till I add AS5. I will gladly take a slightly higher idle speed of 1.2GHZ with .9375 for volt core along with 2.0GHZ at .95 volts.

 

Yep...when plugged RMClock is still very good. On battery let Intel do its thing.