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Master_Scythe

Undervolt: Silicone lottery

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So,

My new laptop is awesome.

As I expected, 15.6" is a little annoyingly big, but I'll live with it for my vision. Its awesome.

It has an i7 4710HQ, 8Gb of transcend ram, and a Dedicated GTX860 with 4GB of GDDR5

 

Lets start:

For one, I cranked the thing to max, using FURMARK and PRIME95 simultaneously.

The fans are NOT as loud as people suggest (maybe I have a newer revision?)

It maxes out at 82~84*C; not bad for shared heatpipe cooling.

 

I then re-pasted the laptop using Gelid GC-Extreme.

The same test resulted in 78~81*C; how bloody awesome is that!!!!!!

 

 

So, with my fresh windows install I have now proceeded to install Intel XTU and started undervolting. Yeah!

And, so far, it looks like I've managed to hit the silicone lottery!

 

I'll update as I progress, but so far, my results are as thus:

 

 

- 80mv Core stable (5min)
- 90mv Core stable (5min)
- 91mv Core Stable (30min)+(5min)+(2min)+(10x 1min)
- 93mv Core CRASHES (5min)+(2min)+(1min-x4)+(30min crash)
- 95mv Core CRASHES (5min pass)+(2min fail)
-100mv Core CRASHES
Yep, that's right, it looks like the i7 4710HQ, the slightly higher clocked, slightly more energy efficient version of the i7 4700HQ, is edging stable at a -92.7mv undervolt!
Temps maxing out at 69*C (but thats without GPU).
I did the multiple 1 minute tests, as the 'fail' normally happens during ramp up\down of speed, and the half hour test is half way through right now.
Next I try to undervolt the CPU LLC (L3 cache) to match the core (its normally happy to do so), then the onboard GPU.
It's going to be a FUN day!!!!!!!!!!!
Update:
93mv crashes during the half hour test. Last 2 Minutes. SO CLOSE!
Will try 91mv next.
Minus 91mv has passed 5 minute, half hour, and 10x 1minute. For now, STABLE.
Moving onto CACHE undervolting, then GRAPHICS.
Minus 90mv CACHE has passed 3x 5 minute 'Memory' tests, and 3x 5 minute CPU tests.
Considering thats almost 1:1 with CPU core voltage, moving onto on-chip GPU. (the NVIDIA wont be touched)
Edited by Master_Scythe
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New laptop is awesome, no model name or link to it :P

 

Cool that the utility can modify voltage though, laptops used to be quite limited. I suppose your next goal is to see how far you can overclock it while undervolted.

 

Since you've redone the paste on the CPU, are there any other components that can be repasted that would help lower total heat?

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Its a Gigabyte P35g V2

http://www.gigabyte.com.au/products/product-page.aspx?pid=5033

 

The Intel XTU is very cool; since it's done by Intel themselves.

TECHNICALLY I'm not lowering the voltage, I'm lowering the dynamic voltage offset.

So at maximum C state, it'll still use the same, but as speed ramps up, the voltage ramps up less.

 

I wont be repasting anything else, the rest is thermal pads; but they have a lot of VR's and everything looked pretty well done.

 

iqa79c.jpg

 

 

GPU undervolt to -60mv caused a reboot within the first 2 minutes.

GPU undervolt to -50mv was stable over 15 minutes.

 

Now testing -55mv, and will leave it there if it's happy.

 

 

Wow, if you look up haswell undervolting, you'll see how incredibly lucky I am to be stable at -91, -90, -55.

True, these are intels own synthetic benchmarks, so some actual gaming and PRIME is yet to come, but you know, its very exciting overall :)

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Well, thats 15 minutes of PRIME 'blend' test, while simultaneously running IntelXTU's Graphics Stress Test.

So that's really as much load as I can possibly put onto this CPU....... Seems stable to me.

Its now up to time and DOTA2 to prove me right or wrong.

 

 

 

So, in final, I've ended up with:

 

CPU CORE = -91.7968750mv

CPU CACHE = -90.8203125mv

CPU's GPU = -55.6640625mv

 

NVIDIA = Stock (untouched thus far)

 

Max temps are 69~70*C now under half hour intel stress test.

This half hour of Prime95 has resulted in 78*C, but as even Prime warns, nothing makes your CPU as hot as it does.

 

I'm also on the 'Silent' fan profile, where it tries NOT to ramp up.

 

If gaming tonight proves to be stable, I'll be one happy camper.

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Does it maintain same stability on battery alone though vs plugged into charger?

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Good point; I realised it wont turbo under battery, so its a good way to test non turbo stability....

and no :(

 

That's OK, I'm still happy to experiment. One cool feature about Intel XTU is you can have different profiles for battery and AC power.

So all it means is I have some tuning to do for my battery mode; AC mode is A-OK.

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So, I've dropped the undervolt to

 

-85 core

-85 cache

-54 graphics.

 

Just passed 10 minute stress test..... will continue. (on batteries)

Passed another 5 x 10 minute stress tests.

Time for steam.

 

Regardless, these sort of numbers arent unheard of for a 4700HQ, but for an 4710HQ? Its usually rare to go above -50mv

Edited by Master_Scythe

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wow that really seems like a good chip you got. Im so use to desktop and adding voltage, its kinda neat to read about how to get the lowest volts for laptop. I still have a older Asus laptop g50vt with a 9800m gs, its been surprisingly capable for these many years for some light gaming but the thing is like 8lbs! I thought about even going laptop for desktop replacement with some sli gaming laptop... more just so I stop upgrading all the time!

 

That intel seems program seems great, nice that you can do profiles for situation!

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Its a Gigabyte P35g V2

(pic)

It sounds like you're getting the performance and screen properties you like, which is awesome.

 

But that build quality looks cringe-worthy, is it as bad as it looks?

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Its a Gigabyte P35g V2

(pic)

It sounds like you're getting the performance and screen properties you like, which is awesome.

 

But that build quality looks cringe-worthy, is it as bad as it looks?

 

 

Do you mean because it looks similar to cracking open a previous gen Macbook?

3.jpg

Nah. It's not that bad.

 

No keyboard flex, plenty of screws holding all the boards, expansion slots out the wazoo, hot swap front bay. The only down side its an elantech touchpad, not synaptics.... it's painful. But, usable.

The fans out the rear like that mean the laptop doesnt get hot (to the user), and I've never seen quite as good of a heatsink mounting as that one. Super secure; none of this '4 corners only' nonsense.

Was there a part you thought looked badly done in specific? There's a 2 year warranty.

Aluminium lid, and keyboard\palm area.

 

 

Now for the Irony, My screen developed a pixel line at about 11pm last night.

Was sitting at the desk, typing away, and it flickered, I thought I was seeing shit (would be normal with my vision), but then flicker, flicker, solid.

Reboot, still there.

Still there in BIOS, not software.....

Let cool, reboot, not heat, still there.

 

 

Dead LCD screen.

Not my fucking luck is it? My god!

On the flip side, my post is still relevant, because a non serviceable part like an LCD doesn't mean bad build quality, just bad ass luck.

Now I have to remove my SSD, reinstall the HDD, and take it back. I hate dealing with MSY returns. At least its only 2 days old.

Edited by Master_Scythe
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Was there a part you thought looked badly done in specific? There's a 2 year warranty.

Aluminium lid, and keyboard\palm area.

All the screw points I can see are anchored in plastic bosses.

 

It can't be avoided, a plastic shell is a plastic shell.

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That's true, but notice how many there are!

All things like hinges have mutiple well spaced screws.

 

 

 

Goodbye good chip :( You have to go back now, thanks to your bloody screen.

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wow that really seems like a good chip you got. Im so use to desktop and adding voltage, its kinda neat to read about how to get the lowest volts for laptop. I still have a older Asus laptop g50vt with a 9800m gs, its been surprisingly capable for these many years for some light gaming but the thing is like 8lbs! I thought about even going laptop for desktop replacement with some sli gaming laptop... more just so I stop upgrading all the time!

 

That intel seems program seems great, nice that you can do profiles for situation!

 

Yep, its damn good.

 

and now I have my replacement with a non faulty screen, lets see how good this chip is :)

 

 

EDIT: So far, Its accepting my previous settings and staying stable as ever. (15 minutes CPU + 15 minutes MEMORY stress test) Memory test maxes out CPU too, so its had 30 minutes of battery test.

ALSO, it seems I've done a better job re-pasting this time; Well maybe.....

 

1*C lower at idle, and at non-turbo.

3*C higher at turbo speeds...... hmm... that is odd.

 

Actually,not its not. It's 26-28*C ambient here, and before I was in a controlled 23-25*C room (server room). So, yes, win!

 

AAAAAAnd just passed 5 minute stress test with turbo (AC power). Looking good!

Edited by Master_Scythe

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This is great stuff, I don't think I've tried to undervolt before. If I'm playing with those settings it is to overclock and increase those voltage settings.

 

I wonder if it would be possible to undervolt devices like the Surface Pro? Devices like that could really benefit.

 

So what is the current situation of your device? CPU and GPU.

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Currently it's warmer than I'd like, but cooler than all reports in the internet.... so I think mine is still good just not a golden child like before.

I'm contacting Gigabyte to see if they'll send me an undamaged heatpipe setup; when I took mine off, it was dented and scratched (not by me); so we'll see.

 

 

As of right now, I'm at -86 core, -86 cache, and -56 GPU. I can make the machine throttle when I max out both CPU and GPU, but not when I do one at a time (which is more than can be said for any other current gaming laptop below 3cm thick).

It reaches 90*C on CPU and throttles, GPU doesn't get above 80*C. But that's after about 5 full minutes of stress test on both.

 

I've been editing my BIOS file and will flash it some time this week.

 

Gigabyte have a nice option in their BIOS file called "Show Hidden Features". I've enabled that, so I should then get the option to disable Hyperthreading (gaining myself a nice 7*C cooler, I dont need 8 cores on a laptop) and people report up to half an hour more battery.

I also then get actual voltage control too, so I can decrease my dynamic settings (I'd start at -50mv) and then decrease my CPU's ACTUAL voltage, since dynamic doesn't affect idle.

(it unlocks a ton more too :D)

 

 

I've been undervolting for a long while. My server (a dual core sempron) run on less than a volt (0.98).

I think my best success was with an old Core2 E1400; I managed an 80mhz OVERCLOCK (yes!), and voltage drop from 1.3v (stock) to 0.78v, stable for 5 hours under PRIME, than for 3 years as my PVR.

 

Those numbers are all pre-Vdroop too :)


So what is the current situation of your device? CPU and GPU.

Edited by Master_Scythe

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Seems good to me.

 

I have a system under the TV that makes too much noise, not very loud, but I want it whisper quiet. I may see if I can undervolt components to reduce heat and then I could reduce fan speed.

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Seems good to me.

 

I have a system under the TV that makes too much noise, not very loud, but I want it whisper quiet. I may see if I can undervolt components to reduce heat and then I could reduce fan speed.

 

What are the hardware specs? There are a few 'features' that add stupid levels of heat too which we can tweak.

Things you wouldn't expect, like dropping RAM speed a step or two which is humanly impossible to notice, which then allows you to undervolt the memory, and as such, the on-chip memory controller.

 

Also, on desktop hardware, even 80~90*C at full load isn't scary.

Even if it halves component life, I have 30 year old CPU's still running strong.

Silencing a fan with a resistor is a daily job for me :P

 

My i7 920 D0 chip has been at 4.2GHZ now for 7 years.

Maxes out at 97*C at full load.

Loves every second of it!

Edited by Master_Scythe

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My media pc specs are:

 

Shuttle XPC SG41J4

CPU: Core 2 Duo E6750 (2.66Ghz) with a cheap cooler, quiet though.

RAM: 4 GB G.Skill 1600Mhz

GPU: XFX ATi 5770

PSU: 250W (too low for GPU but still works)

 

I'm not sure to what levels this system can be undervolted and the main culprit of sound is the GPU.

 

Even though it has enough power for watching media and even plays games nicely like Injustice: Gods Among Us it sometimes blue screens and most of the time makes a whiny sound. The blue screens are probably due to PSU and the whiny sound is probably the limited case space prevents the GPU from sufficiently keeping itself cool.

 

I'm considering selling/throwing it and getting a Broadwell based NUC with Intel i3 and an Iris 6100.

 

If it can be undervolted, I could save cash and help the environment a bit by not adding to landfill. Looking at websites now on how to.

 

-EDIT-

 

I've pulled out the GPU, I'm going to start with the CPU undervolt and RAM undervolt. No idea how yet. I will then re-install the GPU and start to undervolt that if I can get some success.

 

Okay HWMonitor reported max CPU load temp is C1:65 and C2:63. That is hot. Typical value under Prime95 though is C1:60 and C2:59.

 

Bugger, after all that my BIOS doesn't have options to lower voltage, only increase. RMClock doesn't support my CPU, so no CPU undervolt.

Edited by fabman_uk

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Huh? No undervolt in the BIOS? I've never seen one locked like that on a desktop board.

Can you type the value in manually? some dont let you 'scroll down' but do let you type.

 

Intel's own XTU supports Core2Duo I believe, so that's worth a shot.

 

If fan noise is a problem, solder some resistors into the fan power cable.

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Cool, looks like the feature is unlocked. IntelXTU should be able to modify that, yes.

 

Also, is that an older gigabyte board per chance? If so, is the ALT-F1 menu active? (or whatever that button combo was....)

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Na, it's a Shuttle motherboard for the Shuttle case. FG41, del to get to the menu. I'm looking into IntelXTU

 

IntelXTU has no options to undervolt, just benchmark.

Edited by fabman_uk

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What a shame.

 

Just unplug the noisy fan and make sure it doesn't reach 105*C then.

I ran an NVIDIA 6600GT with no fan for 5 years, 140*C daily, it didn't give 2 shits. Still works.

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What a shame.

 

Just unplug the noisy fan and make sure it doesn't reach 105*C then.

I ran an NVIDIA 6600GT with no fan for 5 years, 140*C daily, it didn't give 2 shits. Still works.

 

Cheers

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