The "Undervolting" Guide

Personally, I make the permanent setting at least two steps above the voltage which survived the stress test. After dropping the full speed voltage by something like 0.15V, making that drop only 0.145V will make precious little difference to the power / heat while further reducing the risk of a BSOD.

John

 

I wish I could do that. If I was to bump it up I would be getting hotter again x D. I may consider it, but it seems that my chip is a bit higher than everyone else's, doh. By far the only thing that requires 100% full force is rendering in Adobe Premiere, but I made sure to test my top clock/voltage for a couple hours and no bsod, I don't know if I am risky enough to use my current voltages as default at startup, but then again, my middle name is DANGER. I have some of my information for anyone who needs a hand in my fledgling post linked in my sig.

 

My guide actually says to bump it up by 0.025v which should be 2 steps up to ensure stability isnt compromised

A bump by a step or two isnt much of a significant difference. But if your confident with your voltages and they run rock stable then its not a problem but you do run a very small risk.

You can run yours in startup if you want, theres no risks. If its unstable you can always disable/change it one way or the other.

Startup when windows loads = not boot up .

 

been running STABLE since last post...after loading Hardware monitor i noticed temps didn't match,,,, but i'm still at 0.95v.... so i'm one happy camper... sure beats the Celeron this lappy came w

 

rmclock rocks

 

Now! Which key to get into safe mode and stop RMClock loading???

John

I'm just a little worried, as a long-term user, that the development team seem to be fading. I hope I'm wrong.

John

 

I also have the same impression. I hope you are wrong too because I am not

 

thank you for a great guide
my new gateway p-6381 battery seems to report about 30% gain !!!
this while downloading some torrents and browsing.
lcd brightness is set to 60%
in battery mode i unchecked the 10x from on the demand profile and while on A/C i unchecked the lower 6x
volts changes as follows :

6 x 0.95
7 x 0.9875
8 x 1.0375
9 x 1.075
10 x 1.1

the default was 1.25 (its a 5450 1.66mhz)
i was never impressed with orthos as a load tool, TAT does much better job in heating those cores up especially if u run it along with orthos - on my desktop i used to test o/c with tat and two instances of orthos

furthermore i am pleased with a decrease of about 8-9 Celsius on each core while stressed.

as to temps : hw monitor is constant 15 c off from cpuz and rightmark.
as someone said the fact that that the gpu and the cpu share a heatsink is clearly to show that hwmonitor is in the wrong.
so idiling is around 39-41 (hwm 54-56) gpu is 40
max was 68 (hwm 83) now 59 (hwm74) gpu was 70 while 3 hours of crysis


last note, my e6300 used to be overclocked 24/7 1.86mhz/3.15mhz and was undervolted it never ever gave a single bsod.
undervolting is the way to go

good job

 

I don`t quite follow.In the PoD page there is no such thing to tick.
You mean the one on the second page that I`ve uploaded?

 

Eleron: Im not sure why your superlfm is greyed out, you must have missed something. See attached SS

As said a few pages ago, HWmonitor has a bug for T5xx0 processors. It shows inaccurate temps for some reason. Ive found ORTHOS stresses better than TAT but that doesnt really matter, which ever works for you.

 

Is the Santa Rosa support properly enabled in the BIOS.

I didn't have SLFM and IDA on my Zepto 6024W as originally received. A complaint resulted in an updated BIOS being provided and these features then appeared in RMClock.

John

 

So I guess I should update my BIOS.
The day has come when my old one isn`t good enough anymore.
Thanks.

 

I figured out what was the issue.
Super LFM was not ticked in the profiles tab.
Now it shows up and I can force the CPU at a speed of even 600Mhz now. I`ll do a battery test like that soon and see if it`s any good.

 

On the screenshot you posted above, it looks ticked to me.

 

Mheh, you`re right.
Well, whatever the state it was, I made sure it`s on now and working.
I`m going to pair OCing the CPU with UVing and see where that will take me.
I need 2.5 Ghz , and I want to take it as low as needed.

 

You might wanna disable UV first before raising the FSB.

Your current optimized voltages might not even be enough to run 2.3ghz

 

I`ve already raised them back to defaults and lowered them by 0.1V .
1.22V is the system default for 2.2Ghz, so I`ve went down to 1.12.
OCed to 2.5Ghz,and had the system restart twice on me.
I guess it needs more power,but more voltage means a higher temp. I`d rather have 2.2 and max temps of 61C for the CPU with Orthos after 1h than random system restarts and 2.5Ghz,+increased heat.
Undervolting rocks

 

I managed to undervolt my T9300 (F8Sn-C1 Model) at 1.0500V for the x12 multiplier. The 1.0375 gave me an error in ORTHOS after 20 minutes, which implies that the undervolt was unstable correct?

The temperatures were (HWMonitor/RMClock) max: 58C/53C and average: 53C/48C during the 45 minute ORTHOS run.

I'll finish tweaking the other multipliers tomorrow and see what I get.

 

Yes. An electron somewhere didn't behave correctly due to lack of volts.

As discussed previously, you may want to go more than one notch above the voltage which caused the error.

John

 

Yep,when Orthos gives an error or the system BSODs or restart,it`s when you have to increase the Voltage a bit.
I got my T7500 to 1.02

 

I would love getting errors instead of those dam bsods, hehe.

 

The only thing is that you have to test every multiplier individually. And that`s what gets me.

 

Try undervolting a T2500... it has 6x to 15x multipliers. I gave up after the 3rd multiplier and just selected voltages by instinct

 

I managed to undervolt my T7500 to 0.975V at 11x, giving it only a 0.04V delta between highest and lowest speed settings. It lowered temperatures from 81C to 65C at load. Has been running rock solid for 3 months at this voltage, and I can actually push it even lower to 0.962V, but I experience (very rare) BSOD's at that level. I'm just surprised at how low a voltage it could go.

 

I just have the lowest VID as low as it goes, find out the safe VID for the highest multiplier and let RMClock's auto-adjust intermediate VIDs do the rest. 90% of the time the CPU is running at either its fastest or slowest speeds so tweaking the intermediate voltages is only worth the effort if you create a profile which locks the CPU at an intermediate speed.

John

 

I think the guide says to not click the Auto button under profiles, can you explain what the option does?

 

The Auto option infills the intermediate values linearly once you have fixed the highest and lowest. For example, I for my T7200 have 6x @ 0.95V, 12x @ 1.05V, so it automatically makes 9x = 1.0V.

It's possible that the intermediate voltages could be a little lower than provided by approach this since they are less onerous conditions. However, I prefer to put my effort into an overnight test for the maximum multiplier since that's the case where the CPU is most likely to spend time under full load. Maybe the guide encourages people to practice the configuration the hard way as a good learning experience. I'm several years down this learning path so I prefer the short-cuts!

John

 

Thank you for the information. I am tempted, but I suppose I am still at that learning state.

 

hmm do you guys think that i can undervolt my t7200 CPU, i have the alienware m9750, and whats holding me back is that my CPU is overclocked to from 2ghz to 2.25 , so i dont think its possible to undervolt is it? all what i'm looking for is 2-3 degrees decrease in heat thats all

 

You can only try. 2.25GHz isn't a big overclock and you might find that the CPU is still stable at 0.05 or even 0.1V below the default setting (which is what?).

I once overclocked a T2250 from 1.73GHz to 2.5GHz, but didn't undervolt at the same time. A lot of these Intel CPUs have a lot of headroom, but some don't. It's the luck of the draw.

John

 

Your sugestion is very good, but just like @Flipfire , I trust my instinct better.
I found that 1.02 is rock solid for 2.2Ghz , and then I sort of lowered the other voltages for lower multipliers accordingly.
I`ll have to do an auto mode also , since it seems I`m pretty cheap on Volts,lol

 

Yes its possible undervolt, assuming your current OC settings are stable. Give it a try while the OC is on. Hopefully your OC will still be stable with 0.1v less as John said. Youll be suprised at what you can achieve...

 

I am assuming that this undervolting is only possible for CPU and not GPU,RAM etc?

 

Yes it is only for the CPU.

 

Yeah I believe you can only underclock your GPU not undervolt it. I don't think you can undervolt ram either. Only the CPU can be undervolted I believe.
Tim

 

Hmmm, more interesting stuff from me. I've only been able to test the 10x multiplier on my Athlon 64 +3200 because of time constraints (thinking of trying the auto adjust feature later on b/c of time). My default voltage at that level is 1.40V, and tested a max 46C. Right now I'm running happily at 1.25V and maxed out at 42C (though usually 39-41C) in Orthos with no BSOD's yet. I'll eventually get around to testing lower voltages, but here's where it's interesting... I've noticed that without RMClock I tend to idle, or at otherwise low usage, at full speed, 10x 2.0GHz. But when I set RMClock to the PoD settings as laid out in the guide from my testing, it will idle down to the lowest 5x multiplier. Does that sound wierd?

 

No it sounds about right, its like speedstep. It dynamically lowers the clockspeed to save battery and run cooler. But dont worry it will throttle back up to full speed when it needs too.

If you dont like the lower idle for some unapparent reason, then you can disable it by unticking the lower multipliers so they arent in effect

 

Actually I love the lower idle, I just thought it would throttle back on it's own without the aid of RMClock. That's what seemed odd to me.

Then again, seems this laptop get's more and more finicky by the day. Gonna keep it as a test dummy for stuff like this when I get my new one in a week. *Can't wait*

 

Your AMD is running ice cold.
You could consider OCing it...
One thing I`m fiddleing with, OCing and UVing..
My T7500 will refuse to go to 2.5 without at least 1.15V .
So I have to see what ammount of heat that will produce, and test it with ORTHOS again and again...

 

This is strange... Whenever I turn on my laptop, my profile automatically goes back to "No management" and I have to manually change it back in order to undervolt. All of my undervolt setting were the same however. I even checked the start RMClock when startup. Anyway to fix this? I am using a XPS M1530.

 

On the main profile page, make sure you select 'Performance on demand' on all 4 drop down boxes (current & startup)

 

That's the problem. My main profile page just revert itself back to "No management" on all four boxes whenever I turn my laptop on. =/

EDIT: Nvm, I forgot to click on apply xP. My bad

 

I had the same issue, but I`m pretty keen on observations, so I quickly forced all of them on.
I run my laptop on battery at 700Mhz , should be quite a nice one for the battery life now

 

great! i'm running the CPU @ 1.1v and i'm loving it

 

You can go as low as ORTHOS allows it.
I`m at 1.02 after 1.5h of testing with Orthos,max temp 63C

 

yup i know that, i'm still heavy testing, like leaving ORthos the whole day when i went from 1.200 to 1.500, then 4 hours of gears when on 1.100, just cant afford BSODs otherwise, undervolting rocks!

 

hi guys!
im using ubuntu and XP. now i want to undervolt in ubuntu as well. i know the voltages. but i have to use vids. i know how to calculate the VID but i do not exactly know what corespeed the first number stands for:
77:41 76:34 10:30 8:17 6:17 136:17
6:17 e.g. stands for 1,2 GHz andruns with "17" (0.925). I guessed that "8" is 1,6 GHt. But what are the others? Strange nukbers "136, 77, 76".

 

Im not sure what those numbers mean to be honest. Its not making sense to me

what are you using to UV in ubuntu? im quite interested at this too. have you tried using rmclock through WINE?

All i can say is FSB x multiplier = clockspeed (eg. 200mhz FSB x 11x multiplier = 2.2ghz)

 

I have a T9300 and I'm very interested in undervolting. Do you recommend it to "noobs"?

Btw SiSoftware Sandra says that the Core Voltage Rating is 1.225 (max) while the minimum voltage rating 0.713V is . Is this the minimum I can get without having an unstable laptop?

 

We all have to start somewhere so give it a try. There's a good set of instructions at the start of this thread. You have got a big voltage range with that CPU. It will be interesting to see if the CPU will be stable with the highest speed multiplier down to around 1.0V. it might even go lower.

John