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Lower the temperatures on yourLower the temperatures on yourlaptop by undervolting.laptop by undervolting.

ASHRAFASHRAF JUNE 6, 2011JUNE 6, 2011 5858

Anyone that has used a laptop knows how hot they can get. Manycommercial products like cooling pads are very popular becausethey claim to be able to cool down your laptop. Well for one mostof them actually don’t work (only a few do). For two, undervoltingis a better free solution that will not only lower the temperatures(ranging anywhere from 5-30C) on your laptop by a significantamount but it will help increase battery life and save energy also.The great thing about it is that it does not lower computerperformance at all. Undervolting is just a method to lower the

amount of excess power that your CPU receives.

I have been undervolting my laptop for a while now and I cross my heart, don’t hope to die,stick a needle in your eye promise you that it works. And it works very well: I decreasedtemperatures on my CPU by ~10C. Undervolting is actually one of the first things I do after Ireformat my laptop. If you are still interested, read on to learn how to undervolt your laptop.However be warned that it can be a long process to get it right. I was one of the lucky ones –I got someone else who had the same laptop as me to provide me with the correct values touse so I did not have to do all of what is going to be mentioned below :D

So who can undervolt? Anyone! Do you need to have specific computerspecifications/hardware? No! Ready to learn how to undervolt? Good:

The following guide is the work of flipfire from NotebookReview.com. It is being reprinted herewith permission from him. For this guide he used a Santa Rosa T7500 processor on Vista usingRMclock v2.35.

Please note that while this method has been tested by many and is proven to work, you arefollowing this guide and doing what it says at your own risk – me, dotTech.org, flipfire,NotebookReview.com, nor anyone else is responsible if anything goes wrong.

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*Advantages of Undervolting- Cooler CPU (5 to 20c cooler)

- More battery life (15-30mins more)- Less Fan noise & act ivity

- Longer overall notebook life- Eco-Friendly

By reducing the voltage fed to the CPU, it will run much cooler. It will also draw less power fromthe battery which can give you an extra 10-30+mins battery life depending on the degree ofthe undervolt. Also a cooler CPU means less fan activity which again points to more battery lifeand less fan noise. A Cooler CPU could also lead to a cooler GPU if they share the sameheatsink/fan. It is common sense that a cooler running notebook will last longer than awarmer/hotter counterpart. Heat is the killer of electronic parts.

*Disadvantages/Risks- BSOD (Blue Screen of Death)

You will get a BSOD at the very most if the voltages are too low. This is why we do a stabilitytest to make sure we get no BSOD’s. If the voltages are setup properly you shouldn’t get anyat all. A BSOD seems to be the only risk for undervolting in my experience. So make sureeverything is saved before you do anything. I dont wanna be responsible for any loss or hoo-haa’s.

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You will need to download these programs (Dont install RMclock yet). Click to go on downloadpage

RMclock v.2.35 – (CPU clock utility) Note: A digitally signed/secure driver is required forRMclock to run on 64bit Vista. You can download it from here.

ORTHOS CPU Loader – (Used to stress the CPU and test for stability)

HWmonitor – (Choose between 32/64bit on top left corner)

(ORTHOS and HWmonitor are standalone programs that do not need to be installed . Justrun the .exe files)

1)***Checking Max temps before Undervolt***Firstly, We need to find out how hot your CPU gets when under load to compare whatundervolting can achieve.

1. Open HWmonitor. It will show the CPU/GPU/HDD’s maximum, minimum and currenttemps. Today we are only going to be looking at the CPU core temps. I recommendusing HWmonitor because its one of the best temp programs and its accurate butothers will work too.

2. Run ORTHOS CPU Loader. This handy program will simulate full cpu load for both cores.

3. Click on the Start button and let it run for 10mins. Watch the temps shoot up to about70-90c.

4. Once its done stressing the CPU for 10mins, stop the program and record themaximum temp.

I managed to get a scorching temperature of 79c.

2) ***Installing and setting up RMclock***Note: Vista x64 users will need to download the signed 64bit drivers located above to makeRMclock work.

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1. Unzip/Install RMclock into your notebook

2. Run RMclock

3. Click on the “Advanced CPU Settings” tab. The latest version of RMclock shouldautomatically detect your CPU. If it doesn’t then click on the “Mobile” radio button nearthe bottom and tick “Apply these settings at startup”. Now hit the Apply button

*A MD users need to tick P-State Transistors for a better underv olt

If it asks you to restart the program, do so. After it has restarted go to the “CPU info” tab.Double check its showing the correct processor you have. On this page you will also see alot ofdigits moving up and down about your CPU.

3)***Setting up Profile***Double click on the Profile tab then click on “Performance on Demand” sub-profile.

Tick “Use P-State Transitions” for both AC Power and Battery

Tick all the index boxes possible, Make sure to scroll down and click the others

Click Apply when all done.

Now we head back to the Main Profile page….

Change the current profile in the drop down box to “Performance on Demand” for bothAC Power and Battery

Make sure all the index boxes are ticked. If you have SuperLFM or IDA i suggestleaving this out for the meantime. See down below later on for what these featuresdo.

Untick “Auto Adjust intermediate-states VID” near the bottom and hit the Default button.Your factory voltages should now show up. Click Apply.

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4) ***Undervolting***In the main profile page, you will see different multipliers and voltages.

What are multipliers? Multipliers are incorporated with Intel SpeedStep Technology (seedown below for full definition). Instead of the CPU running at full power all the time, multipliersare used to dynamically lower the clock speeds to make the CPU run more efficiently.

The more CPU power you need, the higher the multiplier your CPU will use. The higher themultiplier, the higher the corresponding clock speed will be. The higher the clockspeed, themore voltage it requires to run (vice versa)

First, We are going to start lowering the highest multiplier’s voltage which is the 11xmultiplier for me.

Most people should be able to lower it by at least .100v to begin with the initial testingthen slowly decreasing it from there on

Always click Apply so the new voltage can take effect then do the stability test below.Keep doing this everytime you lower the voltage

5) ***Testing Stability*** (make sure all work is saved!)1. Open ORTHOS and HWMonitor again. (we will now see how much cooler it is)

2. Go to the “CPU info” tab of RMclock (you can also watch the temps and stats here).

3. Set the test type to “Small FFTs – stress cpu” to concentrate the test to the cpu.

4. Run ORTHOS stress test for 45mins or more

- If it doesn’t crash when the stability test is done then you can go lower. I suggest lowering by.025v at a time till it BSOD or gives a warning error.

*If you get a bluescreen – then you have reached your limit and the voltage is too low. Onceit restarts from the BSOD, it should revert to the last stable voltages. Keep a record of thegood/bad voltages on paper.

*If you get a warning or hardware error from ORTHOS – Your voltage is also too low. Raiseyour voltage and try again.

-Once you have found your unstable voltage, i suggest raising the voltage up by 2 steps. Thiswill put a safe margin away from your unstable voltage to ensure stability

**Its normal to get a BSOD or error at some point so dont freak out. It wont do anyhardware damage.

**Most people are able to achieve .150v to .250v less than their default voltages for thehighest multiplier. Again, it all depends on your processors tolerances.

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6) ***Results***After several changes and stability tests i was able to lower it to 1.100v that’s .150 volts lessthan my standard voltage (1.250v). My undervolt isn’t as great compared to how low otherscan achieve but it has made a significant difference.

My max temps before undervolting was a scorching 79c now it is only 67c! That’s a big 12cshaved off at the cost of nothing.

I cannot accurately calculate how much extra battery life this will give cause of too manyvariables. I can only estimate about 15-25mins by perception as i havent got properbenchmarking programs and monitors. From what other users have posted, they saw anaverage of 10watt difference which should reduce the strain on your hot power adapters.

When you have found your optimum voltage settings, I suggest doing a further 3 hour stresstest (when you have spare time) to make sure it is 100% stable.

Once you have made sure this voltage stable, you can now choose to make these settingsrun at startup:

Go to the Main Profile page > On the drop down box for startup choose “Performance onDemand” > Hit Apply

Now go to Settings page > Tick “Start Minimized in Windows Tray” and “Run at windowsstartup” > Hit Apply

To show your CPU temps in the Taskbar/System Tray > Right click the RMclock wheel icon andclick “Show CPU Temperature”

TA-DA! Enjoy! Watch your notebook run significantly cooler

7) ***Lowering and Testing Other Multipliers voltages***To make the most out of Undervolting, you can also lower the other multipliers to its optimumvoltages. So far we have only set and tested the max multiplier. The lower the multiplier #, theless voltage is needs.

To do the stability test on the other multipliers we will need to disable the highest multiplier byUnticking it in the Main Profile page (11x multiplier for me) then clicking Apply. This will stop theCPU from using this multiplier meaning the 10x multiplier meaning this is the highest speed yourCPU will reach. Each multiplier corresponds to a clock speed 11x is 2.2ghz, 10x is 2ghz, 9x is1.8 (for my CPU of course)

Now you know the drill…

1. Lower the voltages slowly

2. Run ORTHOS test for 45mins

3. Double check in CPU Info page or CPU-z that its stressing and maxing out at the correctmultiplier

4. Find the optimum voltage

5. Move on to the next multiplier by unticking the higher multiplier profile page then back tostep 1

You do not need to test the lowest multiplier (idle) because we cant change/never changedthe voltage. This voltage will always set at a stable voltage

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Its a time consuming process getting the optimum stable voltages for every multiplier but itpays off in the end.

Note: After your done, make sure you re-tick the multiplier boxes in the “MainProfile” page then “Performance on Demand” sub-profile page, If you dont yourCPU will be majorly handicapped

The lower the multiplier #, the more sensitive the voltage is to a BSOD! Most BSOD’s fromundervolting are usually because of unstable lower multipliers. For first time undervolter’s isuggest leaving a small voltage margin from your unstable voltages.

Quicker Alternative: If you dont have to time to stability test every multiplier there isanother way. Ticking the “Auto-adjust Intermediate States” box will fill in all the multipliers inbetween your Idle (6x) to your highest multiplier accordingly. It seems to work well for at mostcases but theres no guarantee that all the multpliers are 100% stable, since it just fills it inmathematically. It seems to work fine for most people though.

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That is about it. Let me know if you guys have any problems undervolting – I will try to help tothe best of my ability or I will refer you to someone who can help.

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About the author:About the author: Ashraf Ashraf

Happily married to the most beaut iful woman Happily married to the most beaut iful woman everever, Ashraf is the founder of dotTech., Ashraf is the founder of dotTech.

Ashraf spends insane hours on dotTech (usually writ ing art icles but sometimes doingAshraf spends insane hours on dotTech (usually writ ing art icles but sometimes doing

absolutely nothing except staring). Yes he is weird, but he is also very friendly.absolutely nothing except staring). Yes he is weird, but he is also very friendly.

58 Comments »« Older Comments 1 2 3

ebrahim June 12, 2011 at 6:58 PM (comment permalink) -

my laptop cannot run ORTHOS for more than 4 minthe temp exceed 100 than shutdown.

a always use powersave mode in power plans, to try keep it run long timewithout shutdown.

my laptop hp pavilion dv6000 with amd turion 64 x2 mobile tl-60

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Smart3go June 15, 2011 at 9:08 PM (comment permalink) -

@mukhi:@AdmiralDeath:It seems that RMclock does not show “Advanced CPU Settings” tab for thoseCPU’s that it does not recognize. In my case I have AMD Turion(tm) X2Dual-Core Mobile RM-70, and although“http://cpu.rightmark.org/products/rmclock.shtml” states under “Supportedplatforms: CPU” that “AMD K7 (Athlon/XP/MP, Duron, Sempron) and K8(Athlon 64/FX/X2, Opteron, Dual-Core Opteron, Sempron, Turion 64/X2)family processors.” are supported I had no luck.

@Ashraf:Acer is not the only manufacturer who is infamous of overheating. In fact Ihave tx2000 and the AMD CPU reaches 100 degree C easily when thefan/heat sink is clogged. My wife’s hp DV# (I forgot its number :) ) alsoheats up but on HDD side. It has to be bad thermal design/bad componentdesign per model as my old Acer Aspire was the best in that regard.If you know someone in hp tell them to hire me as I got better design ideasto eradicate the heating problems from the source, and other ideas as I’m“Smart3go” ;)

Amir June 17, 2011 at 3:56 PM (comment permalink) -

Any idea how I can accomplish this in Linux?

Vardhian November 14, 2011 at 8:39 PM (comment permalink) -

Thx for info ;)

Mark November 18, 2011 at 10:21 AM (comment permalink) -

HP tx1019au, OS: VHP 32, AMD Turion 64 X2 TL-60, 2.0GHzI am attempting to undervolt for the first time.

Recently had the Nvideo chipset removed, cleaned and re-soldered by atech.previously inop the last 8 months, as I was so frustrated with the continualproblems.I assume when it was opened to do the reflow work the fan was cleaned.I will be opening it up soon to check and perform the heat sync work requiredby these crappy HP’s.First things first.I was unable to achieve any improvement with the undervolt procedure,specifically the 10x or 4x multipliers.

Comp. Flat on table:Heat at rest: CPUID HW Monitor: Core 0: avr: 64, Core 1: avr: 52Rightmark 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\applied3. FID: 4.0x \ reduced from 1.1250V too 1.10V\auto-selectdeselected\applied I first tried to reduce the 10x multiplier but BSOD after 10seconds durng Torture test)4. Prime95 Torture Test (small FFT’s) run

Result: 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.

shiva March 26, 2012 at 4:00 AM (comment permalink) -

Does it really work…???….. Or again just a crap…???. And will it affect my

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laptop performance….. Its dell vostro 1400 core 2 duo… Centrino

grats August 25, 2012 at 1:50 AM (comment permalink) -

@Amir:

If you use BIOS it has nothing to do with operating system & will not matterwhich one you’re using

onos January 3, 2013 at 3:11 AM (comment permalink) -

my hp630, don’t show the advanced cpu setting, what will i do????????????pls sm1 help

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