Dell 14z undervolting

So.. I've been attempting to undervolt my laptop following this guide http://forum.notebookreview.com/showthread.php?t=235824

Using RmClock, I reduced the voltages to the minimum and ran Orthos for 12 hours.. without a crash... It seems sort of wierd being able to reduce the voltages to the lowest amount allowed for all of the multipliers, so I was wondering if I did something wrong?

 

No, nothing is wrong. You just have a lucky CPU

 

Are you sure you "Applied" your changes and that you made sure Orthos was set to "Small FFTs - stress cpu"? If you are then you are very lucky.

 

Yeah I did. For me it seems wierd having all 4 multipliers at .8750, since logically the lowest multiplier would have less ><.

 

What processor do you have?

 

The p8600

I was also wondering if there was a power manager for the 9400m?

 

Sweet, that sounds awesome!

I was going to undervolt my processor as well. Did anybody undervolt their 14z with similar specs (in signature) as me? What's the minimum you were able to undervolt to?

 

You are very lucky indeed then, I couldn't get my lowest multiplier down that low, let alone the 9x multiplier. Nice job!

 

I'm running my P8600 at the lowest voltage for all multipliers. However, it's not entirely accurate; RMClock reports it as 0.8750v, but it's really closer to 1.000v.

 

I think I got mine down to .0925, maybe a bit lower. Not sure as I'm running Windows 7 RC at the moment and haven't undervolted it again. Anything below 0.9 is to me pretty amazing.

 

I checked again, and similar to MasterShroom, with RMClock, the profile voltage is .875v, but the VID on the little icon is showing a "required" 1v, so maybe I'm actually running at 1v

 

Run something like Everest or CPU-z to confirm what the voltage is, i'd be intrigued to know if it really is running at .875

 

Checked with CPU-z, and it's running between 1v and 1.088v

 

I did think that you'd have to be crazy lucky to be able to undervolt a p8600 that much

 

Not to hijack, but I have a quick question regarding undervolting this specific computer : Does undervolting affect any performance or settings whatsoever? I can undervolt and extend battery life without losing anything? I can have my cake and eat it too? Why the hell would I be given cake if I wasn't allowed to eat it anway? Now i'm angry!!!

 

trying to think of an analogy.. I guess i would be kind of like.. err.. none coming..

Your processor needs a certain amount of voltage not to crash, and that voltage is lower than what it's being given. I think the manufacturers purposely give extra voltage for guaranteed stability, but it can safely be lower. I guess it would be kind of like having a second air bag in your car in case the first one doesn't go off?

 

It appears the processors are locked at 1.0000v.. Can somebody else confirm?

 

I don't think mine was, pretty sure I got this P8600 down to 9.275 or something like that.

 

Maybe it's a 14z lock?

 

I got my T6400 down to 0.925 (minimum) on all multipliers.

 

Assuming pach has a 14z, then it might be a combination of p8600 and the 14z?

 

Very unlikely.

 

I do have the 14z.

 

How are you guys getting the .9250V option?

The lowest all of my indexes can go is 1.0375V.. I have the T6500, by the way.

Also, is everyone just making changes to the highest multiplier (10x) and leaving the rest at their defaults? Or using the "auto-adjust" option to automatically fill out the other multipliers. Sorry, I'm kind of a noob at this. x(

 

Make sure you have RMClock set to "Mobile" and not desktop, or auto-detect.

 

Aw.. darnit! I thought RMclock detected my CPU already.

Now I have to start over.

 

And on the CPU Info tab make sure that the Current Multiplier is indeed the one that you are currently undervolting

 

Okay, so I just finished doing some quick tests and here's what I came up with.
Idle:
CPU1 52C
CPU2 55C

Under load before undervolting:
CPU1 78C
CPU2 83C

Under load after undervolting:
CPU1 67C
CPU2 69C

With my T6500 processor, I went from 1.1150V to 0.9250V on the highest multiplier -- a 0.225V difference. I was able to set all of the other multipliers to the minimum (0.9250V) as well.

After doing this, my heat dropped 11-14C. In addition, my battery meter is showing 6:12hrs left on lowest brightness, so I gained at least 30 minutes battery life.

Pretty impressive! I only ran the ORTHOS test for about 20 minutes, though, so I'm going to run it overnight and hopefully get no BSODs and/or warnings.

 

So.. since there are at least a couple p8600's that have gone under 1v, would it be more logical to assume I got a locked cpu or that I've done something wrong?

 

RMClock reads voltage settings incorrectly. No matter how low you set the voltage in RMClock, it will never really go below 1v.

 

Except I didn't use RMClock when I undervolted, I used CPGenie, and I measured the volts with both CPUz and Everest; both confirmed it was below 1 volt.

I suppose they might be reading the voltages incorrectly as well mind.

 

is there any way we can power manage the 9400?

 

My Everest summary is indicating lower than 1V voltages as well:

Temperatures
CPU #1 / Core #1 56 °C (133 °F)
CPU #1 / Core #2 58 °C (136 °F)
MCP 64 °C (147 °F)
GPU Diode 59 °C (138 °F)

Voltage Values
CPU Core 0.93 V

 

Too bad NHC isn't ready for x64 ><, also I didn't really like the crystalcpuid.

I got the trial for cpugenie, and the lowest voltage on the cpu was 1v across the board, so I decided to uninstall it since it wouldn't help me at all.

 

I think there is.. I heard it's a lot more complicated and involves flashing the BIOS. At the end of the underclocking guide, there's a link to the NBR cooling thread. You might be able to find more information about managing video cards there.

In RMclock, did you select "Mobile" and not "Desktop" in the settings? I was having the same problem. After I did this, the program allowed me to set my voltages to under 1V.

 

I fiddled around a little bit, and the minimum with desktop was like 1.2v and when I switched to mobile it changed to 1.0875v, which I then changed to 1v and anything under was locked. Honestly I've never seen anything under 1v, even on the 6x multiplier.

 

Did you quit and restart RMClock after changing?

 

I'll try it out and see if it helps.

 

Okay, here is my profile



Here is no load



100% load



I tried quitting and opening the program, using the restart option in the toolbar, and it didn't work.

And yes it is on mobile

 

Yeah, that's what I was referring to earlier; I'm sure RMClock just reads voltages incorrectly.

 

Here's mine:




Did you tick "Apply these settings at startup," "Use P-state transitions," and all of the indexes? That's weird..

 

Yeah >< Since this laptop just came out a few months ago, I can't imagine they've changed anything...

One of the guides said to uncheck the os voltage management, but after I tried it, it seemed like the multipliers couldn't change, so I rechecked it.

Could this have something to do with my power settings?

 

hey i am currently trying out undervolting on my studio 1555...getting the same problem as krap101...the index shows 1.0v as the minimum value....and at the highest multiplier 10x is stable at the 1.0v value and i cant go below since there isnt any option..
I have the same processor T6500 as nilosays...weird..

 

I seriously doubt you have the 10x multiplier stable at 1 volt; I suspect that you need to re-read the undervolting guide because maybe you haven't changed your processor to a mobile processor.

 

well atleast it says tht..and i did remember to change it to a mobile processor...

 

i was able to make all the multipliers stable at 1.000v..and i cudnt go below since there wasnt any option.,,'
plus after the whole process the undervolting hasnt been very effective..
at idle temps are around the same before and after undervolting..
at load there is only a diff of 5-6C..
I wonder wat i did wrong...

 

can you take a ss of the cpu info at load? My profile page isn't accurate under 1v. I have all of mine down to .875v, but the actual voltage is 1v.

 

yea here it is...this is using the orthos software for load test..

 

I'm kind of confused right now since we're having basically similar setups, while some of us can go under 1v when others can't...

If this ever gets solved, I'm thinking about disabling the 8x and 9x multipliers when I'm on battery....