Undervolting HP Envy 14 - i7-720QM

Anyone have any experience with undervolting the CPU in the above mentioned computer? I have read that the GPU is alreadt undervolted a bit, is it possible to undervolt the CPU as well to get less heat (and thus less fan noise?)

If anyone have done it, how much where you able to undervolt it and what programs did you use?

 

Nope the i7/i5/i3 cannot be undervolted.

 

You can in power management, but I have not found that it helps much.
http://forum.notebookreview.com/hp-envy-hdx/501144-envy-14-fan-noise-17.html#post7058528

That will fix fan cycling, but doesn't keep my fan down. It didn't affect me, but I do have Fan Always On in BIOS. The i7 processor is loud.

 

You could try parking your unused cpus. I changed my power savings power scheme to park 7 out of eight cpu's when on battery. I also set my bios fan setting to disable always on.

 

Doesn't that just make that 1 core run at full speed the entire time then? At least that's what I've read.

 

No, that's changing the boot options.

 

My I7 is running on 1 cpu on 1 core still on energy savings at below the 1.73ghz according to Turbo boost monitor from intel. All the others are parked and the 1 running is at low speed until it needs more power. That's how I am able to get my Envy 17 3D to be reasonable on a 9 cell battery (approx 2.5 hours).

 

how do you "park" cores ? Are there any tutorials out there ?

 

This is what I used.
http://forum.notebookreview.com/dell-xps-studio-xps/438883-optimizing-i7-battery-life-ideas.html

I enabled the hidden options under power scheme options to be able to edit them via gui.

 

Can you describe the changes you made. I've already unlocked all the hidden power settings I just have no idea what each setting means. I want to know which ones to change to get better battery life. Thanks

 

So did it get any quieter?

 

quiet is relative and personal. My goal was to increase battery life and lower heat while surfing under battery power. I run with cooling on passive and it doesn't seem loud to me.

 

On battery:
Processor performance core parking min cores -10%
Processor Performance core parking parked performance state - Deepest Performance State
Processor Idle Disable - Enable Idle
Minimum Processor State - 5%
System Cooling Policy - Passive
Processor Performance Core Parking Core Overide - Disabled
Maximum Processor State -100%
Processor Performance Core Parking max Cores - 25% (this parks 3/4 cores)

 

Yeah I realize that, but thanks for the help I will try your settings and hopefully get rid of the cycling fan when browsing.

 

Awesome, thank you so much!

 

Did this keep the fan noise down for you???

 

Yea the fan was consistently on low. The trade off was that I did feel that the computer was slower. I don't mind that because when I am off the cord I'm more likely to just casually browse the web or use word. The battery saving thus far is probably not that much I would guess maybe 10-15min more. I'll get a better idea of how it's changed after I use it for a couple days.

 

How's the fan perform with 2 cores, passive and 100% maximum processor state?

 

I have a problem, I made a no Turboboost schedule with your setting and active cpu throttled at 57% for traveling.

My computer usually starts at the lowest fan RPM, after about 5 min it will enter the medium RPM and never leave to high RPM.
However, if I change from Turboboost setting to a high performance setting my fan will ramp up to high RPM at simple idling. Can this be because of my new "no turboboost schedule"?

 

I wouldn't think one scheme would affect another except where it has to compensate from maybe a passive cooling to active cooling setting when it has to lower overall temps. Does this happen even after a shutdown and restart under the high performance setting. I am running a high performance setting right now with active cooling on and an external monitor and have medium fans at most. That's with no cores parked.

 

Just restarted with a high performance schedule and fan at highest RPM still. I wonder if I should try and bring it back to the store and have it checked

 

Can this be set to passive on all schedules?

 

I don't think you want to do that. You don't want to artificially restrict fan speed when the system needs to cool itself. Did you change the bios setting as well? Is it hot and therefore trying to cool itself? Do you have any software to read temps?

 

I will check it tomorrow when I get back from work.
Mind sharing/giving a tip of a good program for checking CPU temp?
Thanks for help

 

I have used HWmonitor x64
CPUID - System & hardware benchmark, monitoring, reporting

 

I seem to be having sort of similar problems. The computer boots (after being off a little while) at a low fan speed, with temps in the mid 40s C. It then revs up into the 50s, and a louder fan noise, and stays there. I don't know if its because of the passive cooling or what. Any help?

 

Do you guys have the HP power manager software installed? Could that be affecting something? I have done a clean install so I didn't install that software back on. Again I wouldn't recommend using passive cooling with processor/graphics intense operations.

 

Thanks, Just tested

Idle with my No Turbo schedule (same settings as you posted here + max cpu power at 57%) temperature is at: 54-56c on the different cores

Idle with my High Performance schedule: around 59-62c

During Prime with high performance schedule: 70-74c

Is that high/low/standard?

 

I can't speak for a Envy14 as mine is a 17 and an I7-740qm.

Idle on battery with my power save scheme runs 50-54C after a little time to settle in.

I am typing this with Outlook/RSS reader/IE open on High Performance at 58-61C

What Prime app are you running? link?

 

I used Prime Benchmark - Free software downloads and software reviews - CNET Download.com
no idea if it is good or anything but it was the first I found

 

So with that prime app on high performance plugged in with 6cell battery, my temps ran up to 74-81c. My fans really didn't turn up much if at all.