The "Undervolting" Guide

Any software compatible with i5 460???

 

any answers?

 

My CPU is Inter Corei5 460 M

In RMclock

- I don't have "Advanced CPU Settings" tab
- the option "Use PST" is grayed out and there is nothing in the box beneath it (no index, FID & VID).
- RMclock doesn't recognize my CPU...

what can i do?

 

You can't undervolt Core i5.

 

can i do it in CrystalCPU?
because there some options for that

 

I'm in hurry people!!

 

What options are they?

 

As far as I know, there's is no way to undervolt it right now..

 

I love this guide..this thread is amazing!! Thanks for posting

 

HP tx1019au, OS: VHP 32, AMD Turion 64 X2 TL-60, 2.0GHz
I am attempting to undervolt for the first time, been reading for 2 days now..

Recently had the Nvideo chipset removed, cleaned and re-soldered.
Typical HP heat problem.

I was unable to achieve any improvement with the 10x multiplier, so I tried the 4x...same result...BSOD

Comp. Flat on table:
Heat at rest: CPUID HW Monitor, Core 0: avr: 64c
Core 1: avr: 52c
Rightmark Core temp: 64c


My procedure according to what I understand to be correct from the guide:
1. Selected: use P-state transitors (PST)
2. All Indexs selected\applied
3. FID: 4.0x \ reduced only 1 step from 1.1250V too 1.10V\auto-select deselected\applied ( I tried beginning with 10x but any change resulted in BSOD after Torture test (small FFT's ) running 10 seconds.
4. Prime95 Torture Test (small FFT's) run

Result: Heat climbed rapidly to 100c.........BSOD after :10 sec

from what I understand I am unable to undervolt this comp. At all!
Why?
Any help would be appreciated, I have >US$ 3k sunk into this machine.
It has spent >½ it's life (new June, 07) broken down.

 

My system: Dell Latitude E4300, Intel Core 2 SP9400, BIOS A23
I tried the guide but when I use orthos to stress CPU, it runs about 2-3 minutes then shutdown the system because the temp is too high.

Now when I run the big program like games, it becomes very hot and shutdown somtimes.

UPDATE: I can tune VID but can't run orthos test longly because the temp is too high 90-100C when just lasts about 2 mins, so I must stop orthos.

So is it ok when I decrease VID and not run orthos test for long time?

 

Hello guys,

I've tried to undervolt my netbook, which is an Asus K42JV and I have encountered some problem; well I've encountered one big problem: my graphic card has disapeared.
The computer works on optimus technology, switching between an intel card and an Nvidia Geforce 335MX.

I was following the procedure, using different sofwares because the ones proposed here don't work with my config and I was lowering the thing and gaining significantly in temperature until I dropped 8 degrees and lost my Nvidia Graphic card to have only my Intel recognized.

The softwares were : Cpuz CPUID, Crystal CPUID, OCCT Perestroïka; I had found them here: Mon portable chauffe ? Quelles solutions y a t-il ? | CommentCaMarche for those who read french.
The instructions where noticeably the same as those given here exept with different sofwares.

I had problems before with the recognization of my GC but after trying to reinstall all drivers, and not being able to because it doesn't find any card, I don't know what to do. Well I will probably try to make a system recovery but I wanted to know if anybody has any idea of what happened.

Particularly, could it be material ?

 

^shutdown the notebook, take out the battery and power adapter. Press and hold the power button for couple seconds, then turn on the notebook, go to BIOS, set it to default.

 

Thank you for the answer, I'll try that as soon as I come back.

By the way, as I've read that it was not possible to undervolt the i5, my processors are and, even if at this point it can seem ridiculous, it worked quite well regarding the temperature gain. I lauched BF3 at some point and I had gained something like 13°.

edit: It worked !! You've got an altar in my room by now. Thanks a lot

I've put the setting on the upper level and gained significantly.

 

What should I do when I reach the very lowest value of voltage? I don't get any errors, warnings or bsods.

 

If you tested each multiplier with this lowest voltage value, you should keep it

I tested each multiplier for 2 hours, 100% cpu usage with the lowest voltage value and I kept it since. Everything is perfect.

 

HI,
I was trying out this undervolting.
Can undervolting kill my laptop?
I have a T7500 2.2Ghz Acer 5920
Okay, I was progressively reducing the voltage
I was sucessfull for the first few times at x11 multiplier (2.2) but
when I was about to go down to x10 it was okay and I continue
But then suddenly while adjusting the undervoltage for my cpu at x10, it can only do x9.
I started switching back to default profile settings and do the stress test
the cpu refuse to go back to x11
and after resetting my comp I run the stress test , my cpu can only do x8.
But if I set to maximum performance I can get cpu to do x11.
But if I do Performance on Demand. I can only get the cpu to do x8

Can anybody advise. Did undervolting kill my cpu
Help please

 

I'm sure it didn't kill your cpu.

In order to check if everything is ok do the following:
** make sure RMClock doesn't start automatically
** use another program to check out you voltage and multiplier (you can easily use CoreTemp for this)

If everything is OK (and it is) then you must understand what you modified or what, in RMClock, is not as it should be (maybe, by mistake, you selected Desktop processor instead of Mobile processor?)

 

Thanks.
I double check, I didnot understand why in the settings in the separate sections of the profile was uncheck which have cause the RMClock not able to go beyond x8.

So setting back the check on the settings in the individual section of profile fixed it.

Thank you

 

Hi, all I have two questions (by the way well done for this old but amazing guide)

First question is I've never done any undervolting before, but, from what I have heard my CPU I7 740Qm can't be undervolt, is it right?

Second, I was thinking to undervolt my GPU nvidia 445M GT with afterburner, once I will do it, can I also overclock the card at the same time or would it be dangerous?

thanks in advance for all the answers.

 

*bump* anyone please?

 

Q1: I'm pretty certain Intel locked the voltages on mobile core i CPUs so nope, can't undervolt.

Q2: Lowering the voltage on your GPU will reduce the max overclock you can attain in all probability. It doesn't mean that you won't be able to overclock it at all. Clocks too high for your voltage will make things unstable, but it won't damage the card, just make sure that on reboot, your settings won't stay in case your tweaking causes the computer to lockup

 

This is exactly what I wanted to know, thanks for the answer.

+1 rep

 

Hello,
I followed all the steps in this guide, and it seems to be working for the most part. My temperatures definitely are much lower, but there are some weird things happening that I'm not sure about. On the monitoring pane of RMClock, it often shows the voltage spiking very briefly to 1.000, even though the maximum with my current settings should only be .9375. Also, these spikes in voltage often don't come with a corresponding spike of CPU frequency, so it seems to just randomly spike for no reason. It mostly happens when I'm just using Firefox and things like that, and are much rarer when idle or at full load. Any help would be appreciated!

 

Undervolting is awesome. Got a P8600 in my Asus U81A (upgraded from a T6500 which also undervolted well).

x9, 2400MHz = 0.925V
x8.5, 2266MHx = 0.912V
x8, 2133MHz = 0.875V
0.875V for all other multipliers as well.

Using Arctic MX-4, I max out at 50C on OCCT.

 

I cant seem to go below 0.9500V.. its the lowest option. is there a way to do this? I have an asus m50sv with a T9300. Also is there a way to undervolt my 9500M?

 

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Hello, I need to know which software will allow me to unvolt a Sempron SI-42. I was recently given a free Toshiba L455D-S5976. and I want to totally destroy it.

I have been using RMClock on other older laptops, but that didn't work on this one. I read some post back from 2009 but I can't get some of those software anymore from the links(dead). If someone be kind enough to link me to softwares that allow me to destroy this laptop, it would be great.

Also if anyone can tell me where I can get some software I can OC FSB (PLL SLG8SP626V) and also the crappy Radeon 3100.

Thanks!

 

I think undervolting is less popular these days since the arrandale and sandy bridge processors don't seem to support it, and RMclock hasn't been updated for a while. Nevertheless, with the advice of this topic and also after looking at an extremely useful notebookreview thread ( http://forum.notebookreview.com/del...anced-rmclock-powersaving-whining-stop-1.html), I was able to get some good results. I think my results can be helpful for other users in terms of which P-states they should enable.

I decided to try undervolting to get some better battery life because power consumption went up slightly after I replaced my single platter 5400 RPM drive with an SSD.

From Prime95 stress testing, I obtained the following voltage values for the P8600 in my thinkpad T400:

superLFM: 0.875 V
6.0x (1600 MHz): 0.875 V
7.0x (1866 MHz): 0.875 V
8.0x (2133 MHz): 0.8875 V
9.0x (2400 Mhz): 0.9500 V

As you can see, I am lucky that the minimum voltage on my processor is a low 0.875 V, but the highest frequency requires a bit of a voltage jump to operate stably at.

Initially, I was dismayed by the voltage minimum of 0.875 V because it seemed to me that I could not actually lower my idle power usage while on since my CPU already idled at 0.875 V and the minimum frequency while on battery. But then I read through the thread I linked above, and I decided to do the following:

On battery power, I set my processor to run only at 7.0x or 1866 MHz and 0.875 V since it is the highest frequency I can achieve with the lowest possible voltage. According to my reading of the linked thread, by running at the highest possible frequency at the lowest possible voltage, one minimizes power consumption because the CPU spends less time getting things done and goes into the idle state faster or more often.

I confirmed in the thinkpad power manager that idle wattage is actually lower for running at 1866 MHz than at the minimum frequency of 800 MHz in superLFM mode. Previously, I had set the power manager to run the CPU at the lowest possible frequency while on battery power (i.e. superLFM 800 MHz CPU 133 MHz FSB). Thanks to RMClock, I've achieved not only lower idle wattage, but also higher performance while on battery power by having the CPU run at 1866 MHz at 0.875 V. If only my processor could operate at 0.850 V!

So, my recommendation for best battery life would be to operate at the highest frequency that can be achieved while maintaining the lowest possible voltage. This counter-intuitive idea will allow your CPU to enter low power idle states more often.

There is the question about running medium CPU-load processes such as video watching, and whether being at stuck at a higher frequency is bad. I think though, that the CPU should still be able to go into idle power states more frequently or for longer time if the CPU frequency is higher. It might be a tie for such cases.

It might also be that I was lucky to get a processor that can run at its minimum voltage for most of its supported frequency range. I'm not sure if would be able to answer whether running 0.850 V at minimum frequency is better than 0.900 V at an intermediate CPU frequency. In such a case, perhaps it would be better to follow the recommendations in the linked thread.

An endnote:
I would like to note however, that there may be a confounding factor of sorts involved, and that is the processor overhead required by RMClock itself. I haven't found a way to disable RMClock's CPU and other monitoring graphs, but I believe this monitoring is responsible for RMClock's CPU usage. At 800 MHz superLFM mode, RMClock requires 5% of CPU time according to task manager. At 1866 MHz, RMClock reports 0 CPU usage. So it may be RMClock itself hindering the CPU from idling while in SuperLFM mode. Unfortunately there is no way of shutting down RMClock's system monitoring that I know of. Nevertheless, power consumption at 1866 MHz and 0.875 V is still slightly better than power consumption with RMClock shut off and the CPU operating at lowest freq (800 MHz 133 FSB), also at 0.875 V. But then who knows, maybe thinkpad power manager measuring CPU power consumption is also CPU overhead. But then this suggests that running at higher frequencies (while keeping to minimum voltage) is always better power consumption-wise because there usually are system processes running using a small amount of CPU time.

A second endnote:
Before I installed my SSD (a vertex plus 240 GB), my computer used to idle between 8 and 9 W. Even with RMClock now with the settings discussed above, the lowest power consumption I've seen at a normal screen brightness has been 9.6 W or so. Most unfortunate, but SSD performance is nevertheless worth it.

 

Hi I have a Intel Core 2 Duo P8600 2.40Ghz
I have run a stability test for 4hours I got no BSOD and errors. YAY
6.0x - 0.9250v
7.0x - 0.9875v
8.0x - 1V
9.0x - 1.0875
These are the lowest I can go, any lower BSOD will appear.

I got one thing I would like to ask. Under windows 7 default power option
there is a Rmclock power management. Do I choose the option after undervolting? Because whenever I restart my laptop the power option will be
back to the default high performance option.

 

never heard of this, thanks

 

If I reformat and go from Vista to W7, can I apply the same settings as I did previously?

 

my t7500 stable at 1.0375V on x11.

some observations about superLFM , and fsb dinamicly swithing.
CPUz uncorrect shown actual states.
it show that only multiplier reduced to x3(instead x6), and fsb still no changed.
but RealTemp, detect that the fsb has a fluctuation from 199 to 99 with multiplier x11 to 6x , what according to rmclock settings.

 

Could not find the Ortho Cpu loader from the OP link, any one else got one?

And does the instructions on OP still works with most laptop today running Windows 7 X64?

 

i'm having trouble getting RMclock to detect my cpu. i don't have the 'advanced CPU settings' tab that is normally under 'battery info' so i can't click on 'mobile' like it says in the guide.

any suggestions would be appreciated

 

does anyone know if it´s possible to undervolt an old singlecore Pentium 4 m 1,8 ghz?

 

I cannot find the Orthos download, it keeps taking me to separate Forum. Please help, disregard, I just Googled the program and found it...

I have another question, I am using the Windows 8 Consumer Preview 64 bit version, it keeps saying that I need the "RTCore64 driver." I know it's not supposed to work, but I decided to try the Vista drivers linked in OP, just for the S&G's of it, and of course, it did not work. Can anyone help me out here?

 

@Erebus671
Here is a download link for Orthos.

@rivet
I am running Windows 7 x64 and the provided "RTCore64 driver" works for me.

I am currently working on undervolting my P-7811FX's T9600, so I will post back later with some updates.

 

Thanks for the guide. Undervolted my Dell Latitude E6400 to 0.975v from 1.2000v.

Stable so far.

 

Is there a similar guide for undervolting the GPU? Excellent guide by the way, repped.

 

I wish there were. It seems you can only undervolt gpus through flashing the bios.

And this guide is awesome. I overclocked my p8700 to 2.75 ghz from 2.53 ghz and undervolted it to 1.0375 v. Stable for days now and over 20 mins of intel burn. Temperature also dropped from 79 (2.53 ghz) celcius to 71 celcius.

 

Instead of running the Orthos thing, why not just run Folding@Home? It makes my fans go full blast so I'm guessing it causes stress :þ

Also, my RM Clock doesn't have an "Advanced CPU Settings" tab like the other guy above. What do I do?

 

@ flipfire (or someone else): I have a problem, after lowering the voltage of the highest multiplier (x11) and stress testing my laptop's CPU in Orthos for 10 minutes (with RM clock & HW Monitor opened at the same time) I noticed that HW Monitor showed a difference of almost 20º C comparing with RM Clock! (RM Clock showed 60ºC while HW Monitor showed 76ºC at the end of the stress test). Which one of them is right after all?? One of them must be bugged or something.

 

Hello,

I would love to underclock my laptop, but I have trouble following all the steps, in that:

- I don't have "Advanced CPU Settings" tab in RMclock.
- Under the "Performance on demand" tab, the option "Use PST" is grayed out and there is nothing in the box beneath it (no index, FID & VID).
- My CPU Info tab shows that RMclock doesn't recognize my CPU...

I am using Dell Studio XPS-1645 model, Intel Core i7 1.60Ghz processor, Windows 7 OS

 

This guide helped me undervolt an older CPU, but how exactly can I undervolt an i3 processor? Please help me (you are my last resort)

 

You can't undervolt anything newer than the core 2 duos.

Sent from my Galaxy Nexus using Tapatalk

 

Hi everyone, i have Dell Vostro A840 with Core 2 Duo T5800 (original was celeron m560) and i undervolted it to v 1.0500 with all multipliers and it s stable, i reducet temp by almost 20 C, od idle clock is 1200mhz, but i saw somewere that the t5800 can work on 800mhz on idle how can i do that and is the 1.0500v min what i can get with this cpu ? thanks

 

Wow, what a coincidence. I have the same CPU and was just looking at this yesterday. I'm running Win Vista 32-bit. My HP laptop really needs to be undervolted, otherwise it gets rather hot and the fan spins up to vacuum-cleaner-speed quite easily. I had used RMclock for quite a while with no problems. The min voltage with RMclock for this CPU is 1.0500v as you mentioned, and the min frequency is 1.2GHz (unless there are some options in RMclock that I missed).

Yesterday I switched over to ThrottleStop.
http://forum.notebookreview.com/har...arket-upgrades/531329-throttlestop-guide.html

In ThrottleStop there is a SLFM option, and when enabled, the min voltage became 1.0000v, and the min clock speed became 800MHz. The extra 0.05v of voltage reduction doesn't make a big difference, maybe a degree or so, but if you can do it then why not. On my machine I can actually run stable at a constant 1.0000v with all multipliers.

The only real downside I can see to switching to ThrottleStop is that the tray icons aren't quite as nice, and it doesn't have the monitoring graphs. On the upside, the configuration UI is less confusing, it seems to use a little less memory, and of course you gain the SLFM option. I'm going to stick with it for now.

Good luck.

 

hi...
i'm own 6920g with cpu t8100 2.1ghz.
currently, i upgrade my cpu to t9500..
unfortunately, my cpu down shown the temp..??
can anybody help..??
thanks...

 

please help

how do i undervolt my core i3 350m?

this programdoes not recognize my cpu