Can't get i7 stable.

Kasc · 3 Sep 2009 at 23:01

Hey all, I just can't seem to get my i7 stable @ 4Ghz. I've tried both 191x21 and 200x20.

My Vcore is set at 1.3V in the bios, QPI at 1.35V, all the memory timings are what is given in the specification aswell as the voltage.

Should I try putting the voltage upto to 1.35V and seeing if I can get it stable then?

Drake22 · 3 Sep 2009 at 23:08

yea, try more voltage

although it's too high already, is it d0 you ve got or c0?

also what's your ram voltage at?

RIZZEE · 3 Sep 2009 at 23:09

what motherboard you using? D0 or C0 chip?

reygjabla · 3 Sep 2009 at 23:10

You need to write down your speccs so that the "Guru's" can give you advise.

chiLLZ · 3 Sep 2009 at 23:14

Make sure the temps are ok first because more voltage will only make them go higher. my d0 needs 1.36v and 1.38v qpi for 20x200.

DavyBoy · 4 Sep 2009 at 00:07

These voltages seem really high to me, which batch is your processor?

Kasc · 4 Sep 2009 at 00:09

d0.

My mobo is GA-EX58-UD4

Voltage over the RAM is 1.64V, rated at 1.65 but my mobo can only do 1.64/1.66V

Kasc · 4 Sep 2009 at 00:11

I can get 3.5Ghz (166x21) with these voltage settings, which is what I've been running it at for about a week now.

Idle temps are 30-40 (depending on ambient and fan speeds on case) and loads on prime 95 are usually 60-65 depending on the above.

DavyBoy · 4 Sep 2009 at 00:20

I set my RAM to 1.66v in the BIOS, when I check Everest it says it is at 1.65v..

anti5580 · 4 Sep 2009 at 01:56

I'm not 100% sure on the Gigabyte boards but if there are an option to tinker with the IOH/ICH voltage then add some voltage on that as that helped me establish my OC.

zia · 4 Sep 2009 at 06:17

Try turning on acpi 2.0 and load line calibration,it will stablize the volts and you should be able to run 4.0 ghz,also turn off speed step until its stable.

zia

DavyBoy · 4 Sep 2009 at 07:05

I don't see why turning speedstep off will help stabilize his o/c.. I don't experience any differences whatsoever with it enabled or disabled.

@Anti, I think all X58 mobos allow you to adjust IOH Core voltages and ICH.

I am unsure as to whether ICH has any effect on your O/C but IOH Core seems to have an effect when running high Bclk.

Kasc · 4 Sep 2009 at 09:05

No offence, but I'm gonna wait for some more replies before I start tinkering with stuff that I will have no idea what I'm doing. I will keep all this stuff in mind though.

DavyBoy · 4 Sep 2009 at 09:20

Kasc said:
No offence, but I'm gonna wait for some more replies before I start tinkering with stuff that I will have no idea what I'm doing. I will keep all this stuff in mind though.

LoL!!

IOH core voltage is for your Northbridge mate, and raising it a few increments in the BIOS isn't going to cause any ill effects!

It might help towards getting your o/c stable however, but you continue to wait for other people to give you replies...

You are willing to play around with more serious settings like Vcore and Uncore voltages yet you aren't willing to try adjusting NB voltage in an attempt to get your system stable, doesn't really make sense to me..

Good luck stabilizing your o/c..

::edit::

If your chip isn't doing 4GHz with the Vcore at 1.3v and Uncore at 1.35v I personally don't think it is going to, those voltages already seem high to me, any higher and then you are going to be running into serious temperature issues that will prevent you getting it stable.

Which batch is your chip from?

PaulyD · 4 Sep 2009 at 09:47

DavyBoy said:
If your chip isn't doing 4GHz with the Vcore at 1.3v and Uncore at 1.35v I personally don't think it is going to, those voltages already seem high to me, any higher and then you are going to be running into serious temperature issues that will prevent you getting it stable.

This man speaks the truth, seem high to me as well but do hear of people not getting 4ghz from 1.3v sometimes

Does it pass at stock OK?

DavyBoy · 4 Sep 2009 at 11:32

PaulyD said:
This man speaks the truth, seem high to me as well but do hear of people not getting 4ghz from 1.3v sometimes

Does it pass at stock OK?

Thanks Pauly.

He posted earlier in the thread saying he can do 3.5GHz stable, but that is using the same voltages he mentioned in the first post..

My chips can do 3.6GHz with less than 1.2V Vcore and 1.200v Uncore.

Either he is using bad BIOS settings or his chip is a lemon.

PaulyD · 4 Sep 2009 at 11:36

DavyBoy said:
He posted earlier in the thread saying he can do 3.5GHz stable

Meant to pick up on this as well, 99% of chips would do 3.5ghz on practically stock volts or less

anti5580 · 4 Sep 2009 at 13:41

There is a few other elements he needs to change to get it to stabilise but won't know for sure unless he post his BIOS settings.

Kasc · 4 Sep 2009 at 23:35

How do you post them (a way other than taking pictures)?

DavyBoy · 4 Sep 2009 at 23:39

You can use this thing here to fill in your BIOS settings, and then just take a screen cap of each section.

http://www.jzelectronic.de/bios/x58.php

You can enter through each section like Advanced CPU Options, Votlages page etc etc and just enter your values like you would in the real BIOS, then take the screens and post them on here..