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Help gettin stable 4ghz oc?

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September 25, 2010 2:51:46 AM

ok so another user on overclock.net forums has the same motherboard and cpu as me, so he's been trying to help me oc my cpu to 4ghz. i cannot seem to get it stable, within 1:40-1:50 running linx with max memory it errors and stops.

ive been using higher vcore then him because i was going to work my way down to see what the lowest vcore i could use that was stable.

heres some pictures of his settings then ill post what i used, so maybe you can help me figure out what to try.

http://img13.imageshack.us/i/dscf3757o.jpg/
http://img841.imageshack.us/i/dscf3758.jpg/
http://img237.imageshack.us/i/dscf3760.jpg/
http://img210.imageshack.us/i/dscf3762v.jpg/
http://img185.imageshack.us/i/dscf3763.jpg/
http://img830.imageshack.us/i/linxmaxtemp.jpg/

i used same exact settings but i used, 1.38v on dram due to me having 1.35v ram (when i enter 1.35v to switchs to 1.38), and thats not the culprit because when i reset bios to stock and ram to 1.38 it ran linx fine.

i also use 1.32v vcore, 1.30v cpu vtt, everything else is identical. after that i tried "high vdroop", 1.35v vcore, 1.32v vtt and after loading windows i opened linx and bsod'd. after that i reset bios and still kept bsoding after starting the computer with default settings. after clearing cmos it's working again, so thats where i am at the moment.


my specs are,
intel i7 860 cpu
msi p55 gd80 motherboard
g.skill eco series 1600mhz ram

More about : gettin stable 4ghz

a b à CPUs
a b K Overclocking
September 25, 2010 3:25:07 AM

What are your CPU core load temps? What cooler?
What memory multiplier are you using?
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September 25, 2010 3:36:22 AM

on stock settings 28-32c idle / 48-50c load.

what the oc vcore, i got 38-42c idle / and reached 78-80c then linx errors and stops and goes back to idle temps.

thermalright silver arrow is the cooler, and not sure what you mean by memory multiplier, but im using memory ratio 4. same settings for memory as picture minus memory voltage mines lower.
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a b à CPUs
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September 25, 2010 4:28:46 AM

Well, it's not obvious but it wants something.

Try to keep your LOAD vcore in the 1.32-1.33v range and run prime95, small fft first.
If that passes (even a half hour) then try BLEND. If blend fails it's most likely your ram holding you back, if small fft's fail it's the processor.

You may also want to try playing with your VTT voltage. I've had it both ways where it wanted more or sometimes even less.

It's getting late and I can't type worth a damn so I'm hitting the sack, let me know how it goes.
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September 25, 2010 5:33:55 AM

what do you mean by "load" vcore? and so i should remain with 1.32vcore and just keep working on diff cpu vtt's? ive been using vtt 1.3v what would you try?


i dont know anything about overclocking, i will try that on prime sometime tomorrow to see if it helps narrow down to which culprit it is.
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a b à CPUs
a b K Overclocking
September 25, 2010 5:45:58 AM

I am running an i7 860@4ghz 10hrs prime95 stable with vcore 1.29v and vtt 1.19v
the max safe vtt is 1.21v and vcore is 1.35v according to Microsoft. Anything over max safe voltages on an i7 can cook the CPU and socket from what Ive read online. Dont run the memory over the rated speed until you have a stable CPU overclock. Also I left PCH and PLL voltage on auto as they made my system less stable. The PLL voltage in lamens terms helps control the voltage fluctuation of the vcore while the cpu is under a load but to much PLL voltage can cause instability. I hope this helps. [:bohleyk:1]
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September 25, 2010 6:16:02 AM

so my vtt might have been too high? can i use 1.19v or is cpu vtt not really universal?

memory is only running at its intended settings, however when over clocing it goes to 1500mhz something, vs the 1600mhz.
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a b à CPUs
a b K Overclocking
September 25, 2010 6:23:21 AM

I would set the vtt to 1.19v and leave the memory alone.
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a b à CPUs
a b K Overclocking
September 25, 2010 6:28:45 AM

Also is there an option on the MSI boards to turn off turbo boost? If there is turn it off.
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September 25, 2010 6:50:49 AM

yea its off, its usually at this section, http://img13.imageshack.us/i/dscf3757o.jpg/
but when you turn a certain setting off it dissapears.

i will try vtt 1.19v, pll auto tomorrow with 1.32v vcore. if it is stable then ill work my way down in vcore.

what do your temps look like?

on stock settings i get 28-32c idle, 48-50c load which i thought was really good but, when i ran linx (on the unstable 4ghz oc) i reached 78c-80c within 1:40-1:50.
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a b à CPUs
a b K Overclocking
September 25, 2010 7:01:17 AM

34c-36c idle and 72c-75c load.
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September 25, 2010 7:22:18 AM

yea with pll auto, vtt 1.19 = instant bsod.
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a b à CPUs
a b K Overclocking
September 25, 2010 7:29:23 AM

You might try lowering the QPI clock I cant remember what mine is set at. I will look at the pics some more and see if I can find anything else.
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September 25, 2010 7:41:30 AM

qpi ratio? if thats what you mean 16 is the lowest.
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a b à CPUs
a b K Overclocking
September 25, 2010 7:44:07 AM

I will try to get back to you in the morning Im tired and cant think.
It may just be the batch. I wouldnt try to push it to hard. If you can get a good 3.8ghz clock with safe temps and voltage I would leave it alone. I have seen people get 4.3ghz on air out of the 860 with just over the rated max voltage and I have yet to hit that so just remember not all CPU's overclock the same.

Remember
Dont go much over 1.35v vcore and 1.21v vtt
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a b à CPUs
a b K Overclocking
September 25, 2010 7:50:54 AM

One other question it might sound stupid are you using a 4 or 8 pin cpu connector?
Stupid question I know.
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September 25, 2010 7:51:14 AM

really id be happpy with just a stable 3.4 or 3.5. but wouldnt know what volts.
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September 25, 2010 7:51:32 AM

d1rtyju1c3 said:
One other question it might sound stupid are you using a 4 or 8 pin cpu connector?
Stupid question I know.



8pin
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a b à CPUs
a b K Overclocking
September 25, 2010 7:57:30 AM

ok.
Also if you didnt know the vtt voltage is you QPI/FSB voltage just making sure because you asked if it was universal.
Be back in the morning.
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a b à CPUs
a b K Overclocking
September 25, 2010 8:00:13 AM

You should be able to get a stable 3.4-3.5ghz clock with vcore set to 1.23v or lower and everything else on auto.
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September 25, 2010 8:02:59 AM

d1rtyju1c3 said:
You should be able to get a stable 3.4-3.5ghz clock with vcore set to 1.23v or lower and everything else on auto.



i will try it tomorrow, thanks.
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a b à CPUs
a b K Overclocking
September 25, 2010 8:04:09 AM

No problem. let me know how it goes.
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a b à CPUs
a b K Overclocking
September 25, 2010 3:05:46 PM

mindlogiczero said:
what do you mean by "load" vcore? and so i should remain with 1.32vcore and just keep working on diff cpu vtt's? ive been using vtt 1.3v what would you try?

The load vcore can be determined by having CPU-Z open when you run your stress testing and seeing what it reads. Depending on your MB and BIOS it could drop or even raise when under load.

The 1.21v VTT limit was revised by Intel a couple of months ago so you don't have to worry about that, the Absolute max is now 1.4v so your safe.

I never even bother to change my QPI to 16x unless I'm over 4.5 Ghz, it always stays on 18x but either way it shouldn't matter for what your doing.
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a b à CPUs
a b K Overclocking
September 25, 2010 3:14:50 PM

Where did you read it was revised.
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a b à CPUs
a b K Overclocking
September 25, 2010 3:37:49 PM

The Intel data sheet on the processor.
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a b à CPUs
a b K Overclocking
September 25, 2010 3:43:37 PM

Since pictures are always fun, YMMV (this OC is NOT optimized just wanted to give you an idea) remember not every chip or MB is the same. This is on water too, so watch your temps.
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September 25, 2010 4:06:44 PM

RJR said:
The load vcore can be determined by having CPU-Z open when you run your stress testing and seeing what it reads. Depending on your MB and BIOS it could drop or even raise when under load.

The 1.21v VTT limit was revised by Intel a couple of months ago so you don't have to worry about that, the Absolute max is now 1.4v so your safe.

I never even bother to change my QPI to 16x unless I'm over 4.5 Ghz, it always stays on 18x but either way it shouldn't matter for what your doing.



i believe when 1.32v was set, bios changes it to like 1.318v. when i run the computer it reads 1.33v in hwmonitor. and i dont to say i remember seeing it go up to 1.35-1.37v within the 1:40-1:50 that i ran linx.
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a b à CPUs
a b K Overclocking
September 25, 2010 4:12:02 PM

RJR said:
The Intel data sheet on the processor.


Ok I read the data sheet but 1.4v seems like a huge jump from 1.21, I dont get it. Not only that you dont need that much voltage to overclock to 4ghz anyway temps on air and low end water cooling would go way to high. Mindlogic zero was already hitting 80c in linx.
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a b à CPUs
a b K Overclocking
September 25, 2010 4:18:14 PM

Depending on your MB and Bios the voltage can change between Bios/idle/load.

Like mine (above) was 1.3v Bios / 1.28v idle / 1.312v load with load line calibration enabled in the Bios with my Gigabyte MB. Without LLC enabled my idle and load will drop substaintially to the point 1.3v Bios would not work at 4.0 Ghz. These are just little things you will pick-up as you get more into overclocking.

I would try the prime95 stress test though at say 3.5 Ghz and work your way up.
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September 25, 2010 4:26:08 PM

d1rtyju1c3 said:
Ok I read the data sheet but 1.4v seems like a huge jump from 1.21, I dont get it. Not only that you dont need that much voltage to overclock to 4ghz anyway temps on air and low end water cooling would go way to high. Mindlogic zero was already hitting 80c in linx.



when i did 1.3v vtt, 1.81v pll i was able to boot fine and no bsod's but couldnt pass a linx test. with 1.19vtt, auto pll(auto sets it to 1.8v) i couldnt boot without bsods. could it mean that i just needed more vtt? regardless if my overclock is failing from not enough voltage from 1.32vcore 1.3v vtt then i dont want to go higher then those.
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a b à CPUs
a b K Overclocking
September 25, 2010 4:28:03 PM

d1rtyju1c3 said:
Ok I read the data sheet but 1.4v seems like a huge jump from 1.21, I dont get it. Not only that you dont need that much voltage to overclock to 4ghz anyway temps on air and low end water cooling would go way to high. Mindlogic zero was already hitting 80c in linx.

I can think of a few reasons, but of course only Intel knows for sure.

They may have done it to keep the i5/i7 (8's) from stealing any of the i7 9's glory, or maybe they really didn't know what to set it at because of the changes in the chip and were just playing it safe to see what the chip could actually handle out in the wild. Don't know.

Yep, completely agree that you don't need anywhere near 1.4v vtt for 4.0 Ghz but it's nice to know if you have to go over 1.21v you can.
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September 25, 2010 4:46:47 PM

so for 3.2-3.5 stable you say try 1.23v vcore everything else auto, vdroop still low? and everything i disabled on 4ghz do i continue to keep them disabled?
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a b à CPUs
a b K Overclocking
September 25, 2010 4:52:00 PM

Yes.
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September 25, 2010 5:12:47 PM

ok

vtt is on auto, which is 1.126v
pll is on auto which is 1.8v

set the cpu base freq to 162 which was needed for 3.4ghz.
so far ive passed 4 tests on linx, http://img80.imageshack.us/img80/7317/passone.png
picture only shows one but at the time of typing this its at 4. yesterdays 4ghz stopped at 1:40-1:50 before one test was completed.


now should i try lowering vcore for better temps for this same oc or should i try raising the cpu base frequency
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a b à CPUs
a b K Overclocking
September 25, 2010 5:14:38 PM

Try raising the base clock.
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September 25, 2010 5:14:44 PM

also, i had to change memory ratio to "5" instead of 4. with my 4ghz oc 4 was needed for 1500mhz on the ram, with this oc 5 was needed for 1620mhz on the ram
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September 25, 2010 5:16:26 PM

d1rtyju1c3 said:
Try raising the base clock.



what would you raise it to? and should i go ahead and set pll to 1.81, and raise vtt?
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a b à CPUs
a b K Overclocking
September 25, 2010 5:20:28 PM

Just raise the base clock to 167 and leave everything else alone.
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September 25, 2010 5:24:47 PM

ok brb, i just closed linx at 20 minutes which was 10 runs. going to go try 167 then ill be back to see what next.
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a b à CPUs
a b K Overclocking
September 25, 2010 5:54:05 PM

I would try to keep your memory around 1600 until we get the cpu stable at the maximum overclock we can.
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September 25, 2010 6:18:09 PM

memory at 1674 i think?
i was referring to timings.

and i set linx to 10 runs and passed. any more testing needed, or think i should try anymore on base click using same vcore?
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a b à CPUs
a b K Overclocking
September 25, 2010 6:25:46 PM

Try bushing base clock to 172 everything else the same.
Try to keep memory at 1600. If you have to slighty raise the memory voltage.
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September 25, 2010 6:38:56 PM

how do i keep memory at 1600? next oc will raise it to 1700mhz on ratio 5 and ratio 4 would be like 1200mhz or 12500mhz(im guessing).
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a b à CPUs
a b K Overclocking
September 25, 2010 6:44:53 PM

At 4 it will be at 1376 set it to that and leave voltage and timmings alone.
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September 25, 2010 7:14:39 PM

just finished linx 20m runs which was 10 passes. max temp was 70c.
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a b à CPUs
a b K Overclocking
September 25, 2010 7:17:58 PM

Ok raise base clock to 177 leave everything the same and try it but I have a feeling this is where we are going to have to start messing with voltage.
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September 25, 2010 7:53:29 PM

friends coming over, so ill either try this tonight or tomorrow.

any reason why when i get bsod's from a bad oc i cant just restore bios because i continue to bsod so i have to clear cmos?


also clearing cmos, do i just hit "clear cmos" button or do what ive been doin which is taking battery out hitting clear cmos then waiting 40 seconds to put battery back in. if i can just hit clear cmos it'd be much more convenient. have to take gpu out to reach battery.
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