Program for Undervolting i7 870

Toggle sidebar Toggle sidebar
Sort by date Sort by votes
nukemaster

nukemaster

Titan
Nov 23, 2004
19,626
6
74,965

A big +1 to this.

What board do you have, Most allow you to use an offset to push the voltage down at every level at once(my offset is - 0.08750v).

My i5 750 idles at 0.8 volts and load(all cores with Prime95 at 1.04 :) ). I have no control over the Turbo setting that pushes it to 1.20-122(but with those kinds of loads, it has been no issue anyway)
 
Upvote 0 Downvote
nukemaster

nukemaster

Titan
Nov 23, 2004
19,626
6
74,965
I must have a lucky chip. While it is an i5. It undervolts like a dream

You can also see the current and idle power use in the images(because the UPS supports monitoring in HWmon)
All cores Prime95 1.04 volts
1 core Prime95 1.17(but it gets to 1.20-1.22 depending on load)

I do not think 80 will kill it or anything, but if you have some bolts and an old 775 heatsink, you can bolt it on :)
Bolted LGA 755 heatsink It actually worked well
The final heatsink :) with some gentle fan thinning.

Again, with the locked bios, I think you will just have to live with it until you get your new heatsink. What did you get anyway?
 
Upvote 0 Downvote
icraft

icraft

Distinguished
Mar 4, 2013
1,063
4
20,015
Yeah, I got it so I can use it in the PC I plan to build in a year or two. (If they dont move to lga 1294 or whatever) I'll email them, hope that have better CS than some other companies.

EDIT: Whhaaatt? "spentshells selected this answer as the solution April 10, 2013 1:40:49 PM" How'd that happen?
 
Upvote 0 Downvote
nukemaster

nukemaster

Titan
Nov 23, 2004
19,626
6
74,965
The bios has to be made for the board. Flashing an improper bios will will actually make the board no longer even work.

Your temps are not going to kill the cpu, so just use it as is would by my suggestion. A little extra heat vs killing the system.

The best answer thing may be a bug, any users even not the poster can select an answer, you can remove it if you wish.
 
Upvote 0 Downvote
icraft

icraft

Distinguished
Mar 4, 2013
1,063
4
20,015
I know the temps are fine, and I know you can brick it. I wish it had a dual bios like the hd 7950. My temps are so good I want to do an oc on stock volts but I have the retarded bios. Speed fan has a clock option, but it's software and doesn't support Intel mobos.

Also, he has the answer for good. Oh well. No offence to him, but this isn't solved yet.
 
Upvote 0 Downvote
nukemaster

nukemaster

Titan
Nov 23, 2004
19,626
6
74,965
I can remove it for you if you wish.

I do not see any good options to be honest.

The problem is dell has custom boards made by third parties. Some HP boards have been just Asus boards in the past that may have had a chance, but these dell boards are just not sold under other names that I can see.

Back in the day, bios hackers used to make custom bios files for boards without overclocking, but it seems to not be done any more.

This is an older guide to using RMclock to undervolt. I am not 100% sure if it even works with newer cpus as the software does not seem to get updates anymore.

http://forum.notebookreview.com/hardware-components-aftermarket-upgrades/235824-undervolting-guide.html
 
Upvote 0 Downvote
icraft

icraft

Distinguished
Mar 4, 2013
1,063
4
20,015


Eh, I'll deal with it. Thanks!
 
Upvote 0 Downvote
icraft

icraft

Distinguished
Mar 4, 2013
1,063
4
20,015
From another forum.
No, it is not.
On air, it's impossible. The Laws of Thermodynamics prevent it..

The fan blows the aimbient temperature to fins which are getting warmed up by the CPU. How on earth would you get temperature below the ambient temperature by doing this?

Don't trust your sensors if they are showing that, they are 100% wrong.
Click to expand...
Moving air can absorb more heat than stagnant air. That said, they may be wrong, how would I recalibrate that?
Also, I suspect my vcore is 1.3, been creeping up from 1.24 for a few days now. What the crap?
Click to expand...
5OYbZIl.gif
 
Upvote 0 Downvote
nukemaster

nukemaster

Titan
Nov 23, 2004
19,626
6
74,965
It is a general FACT that you can not go below ambient temps even with water cooling. These sensors are made to be accurate enough to save the cpu from high heat(and they can vary from cpu to cpu as well), but Intel did not design them to be that accurate at lower temps(MB sensors are no better.).

MB sensor shows 17c as the lowest, but the room the system is in was never that cold.
idletempso.png


Compressor/phase change/ect can, but those are another story all together.

When you say any luck, are you asking me if RMclock works with my setup? I can give it a try when i get a chance.

 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom