Undervolting

Hey all, I have a T2400 1.83ghz Duo processor. I want to undervolt my cpu using RMClock, but ive gone through some of the guides and some of the options dont show up, Would I still be able to undervolt the cpu using RMclock?

 

Try either NHC or RMclock, both have issues in vista though and that could be your problem.

http://forum.notebookreview.com/showthread.php?t=124420&highlight=undervolting+rmclock

 

Im on XP, i decided to give NHC a whirl since everything shows up, Here is the problem, 11x was at 1.2625, and my temp was 75, was able to get it to 1.1375v , but the most im getting is 70c, it's not getting below even though im going .2v lower every step, does this mean NHC isn't working as it should be? Also If was able to get my Max to the min which is 1v, logically, doesn't this mean i should be able to set 7,8,9,10 at 1v as well?


Forgot to mention that when monitoring the CPU test, when i undervolt it, i get some spikes to 1.2625v, is that normal?

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EDIT: ran another test, i was able to get it down to 1.0875v, and i Still got 70c...why won't it go lower



Is it because i have to set all 11x to 1.0875? I have three 11x showing up on cpu voltage using NHC

 

Any temperature decrease at full load is significant, especially a difference of 5 degrees(which is a lot!).

Which CPU tests and utilities are you using? Are you running stability tests?

 

Oh i see, it's just that a lot of people who have nearly the same cpu are getting at least 10c lower.still though, shouldn't there be temp differences between 1.175v and 1.08v? 1.08v is by default 9x, I thought their would be temp differences between 11x,10x,9x,8x and 7x. Im using orthos for the stability test. NHC is showing three 11x , i changed one to 1.08v, the other two are at the max 1.2625v

Im using everest to monitor my fan speed, core temps, also using NHC to check the cpu temps and monitoring.

 

make sure when you run Orthos, use Small FTTs as that focuses on solely the processor.

 

All CPUs are different despite being the same model number/speed. The only way you can compare is through the stepping number(use CPU-Z), but even then it's based on luck if you can find a better performing one that uses less voltage and creates less heat.

If your really concerned, I would recommend using thermal compound on your heatsink/heatspreader instead as that would have direct cooling increase.

 

I running orthos, I attached a pic of whats going on 2 posts above ya, I am using Blend CPU and RAM, I assume its using Small FTTs?

 

Nah, stop the test and click the drop down beside the Blend CPU And Ram section and you'll know what I'm talking about.

 

So how do I check the other multipliers (7x-10x) stablility after you find the stability undervolt setting for 11x

 

Im using RMClock, Since im on XP, I read blackbird's guide and he says you have to click on "Mobile" setting, the thing is, Its grayed out for me, I assume that setting is for Core 2 duo's not core duo's. It seems the lowest I can get for 11x is 70c

 

Can someone please explain the logic behind why 11x at 1.256v is 70c for me after running orthos, but also 11x at 1.075 it still reached 70c? I thought lower the voltage, lower the power, which means lower the heat?

btw my min (6x) is 1v. how is possible for 1.075v to run at 70c?

 

Are you running any programs in the background? Could you provide some screen shots?
Tim

 

Just running antispy, antivirus and utorrent, thats about it, yea ill take a screenshot next time i run the test, I run the orthos test for 1hr to check the stability

 

Something strange going on. I wold expect 11x @ 1.256V to run hotter than 70C. I would definitely expect to see at least a 10C temperature drop. Are you using RMClock's monitoring page to see the CPU speed, voltage and temperature?

One aspect of RMClock which can catch people out is that you need to set up both the main Power profiles page (speed + voltage) and then set up an individual profile and choose which speeds you want to use.

John

 

Oops your right, 11x @ 1.256 is 77c at most but hovers around 75, when i lower it to 1.21 i get 70c. From their i cannot get any lower for some odd reason. I think im going to uninstall RMclock and try NHC. When using Rmclock the Cpu temp doesn't even show up! (sometimes it does, sometimes it doesn't) and when using RMClock all the settings 6x-11x is by default 1.26v! Ill try NHC and see if it does the same problem. Ill post a screenshot once i set up testing NHC undervolting settings.

 

Posted a screenshot on the Step to Step guide overclocking ATI, using NHC only made a 2c difference, other than that i am still confused as to why im not getting lower temps by decreasing 11x voltage

 

Could it be that RMClock sometimes shows incorrect clock speed values?

When CPU-Z and Everest report 2394GHz, RMClock says 2209GHz.
(After a reboot RMClock shows correct values)

My CPU can get really hot when playing Unreal Tournament 3... without undervolting I once got 91°C. After undervolting the temperature rose to around 81°C before the fan began blowing at high speed and then the temperature stabilized at 78°C.

Here are my undervolting results (after 1 hour test using Orthos):
2.40 GHz @ 1.137 V (78°C, high fan spd)
2.20 GHz @ 1.075 V (74°C~81°C, mostly medium fan spd)
2.00 GHz @ 1.012 V (75°C, medium fan spd)
1.80 GHz @ 0.950 V (70°C, usually low fan spd)

I set the voltage for 1.60 GHz and lower to the lowest possible voltage of 0.937 V (1.80 GHz ran stable at that voltage)