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Strange OC

Post Date: 2008-02-07
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Roger View Drop Down
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Posts: 26 		  Quote Roger Quote  Post ReplyReply bullet Topic: Strange OC
    Posted: 07 Feb 2008 at 8:56pm
Hi guys,

Take a look at this pic, what do you think would cause this to be so different on the OC?  Any Ideas?


Roger




Edited by Roger - 07 Feb 2008 at 8:58pm
Ultra Case - Q6600 3.2GHz - 750W PS - nVidia 780i SLI MB - 2GB DDR2 800mhz SMS2 - 8800GTS 512mb - 320GB WD HD - Onboard Audio - Dual DVD's - Stage 2 Cooling - Vista Ultimate
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Solo View Drop Down
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Posts: 395 		  Quote Solo Quote  Post ReplyReply bullet Posted: 07 Feb 2008 at 9:23pm
Im guessing because when the system is not being stressed it reduces the multiplier to save power/CPU life?
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Bill the Cat View Drop Down
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Posts: 1150 		  Quote Bill the Cat Quote  Post ReplyReply bullet Posted: 07 Feb 2008 at 9:27pm

I'm not a quad expert, but I don't see anythin unusual here. This is your processor's "just cruising" mode. The FSB is screaming, but the CPU clock has been set to 2/3 max freq, because there's no work for it to do; thus the 6x multiplier. Get a program like prime95 to exercise the CPU while you're monitoring it. The multiplier should go to 9.

This CPU idle setting can be disabled in the BIOS, but I wouldn't do it if I were you.
 
This machine is screaming fast for a Q6600. The CPU will pop up to 3.6 GHz under load. But, your Vcore, if I'm reading it correctly, is getting borderline dangerously high. And your idle temps are warm....


Edited by Bill the Cat - 07 Feb 2008 at 9:28pm
3.6 GHz E6850,       4 GB RAM, GTS 250,   TJ9, Win 7 64-bit
4.4 GHz i7 3930K, 16 GB RAM, GTX 670, 550D, Win 7 64-bit
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Roger View Drop Down
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Posts: 26 		  Quote Roger Quote  Post ReplyReply bullet Posted: 07 Feb 2008 at 9:35pm
Well,

I couldnt believe it either!!  I just unboxed this machine not more than an hour ago!!  When the bios flashed by, and it said 3.6 my jaw bout hit the floor!!  That is a 50% increase over stock speeds.  Man!!  Might be the best 25 bux ive ever spent on a puter.

Wow, Im impressed so far!!!

Roger

Who built this rig?  I need to take him out and buy a buncha beers for him!!
Ultra Case - Q6600 3.2GHz - 750W PS - nVidia 780i SLI MB - 2GB DDR2 800mhz SMS2 - 8800GTS 512mb - 320GB WD HD - Onboard Audio - Dual DVD's - Stage 2 Cooling - Vista Ultimate
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Tyler Lowe View Drop Down
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Posts: 0 		  Quote Tyler Lowe Quote  Post ReplyReply bullet Posted: 07 Feb 2008 at 11:03pm
The idle temps are fine. The Vcore is a bit higher than I might go, but still acceptable for a quad. You GO stepping owners have me jealous. My Q6600 B3 flakes out at anything past about 3.15 GHz (~350x9).
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Duke View Drop Down
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Posts: 262 		  Quote Duke Quote  Post ReplyReply bullet Posted: 08 Feb 2008 at 3:04am
Its the C1E Halt State option in the BIOS (on by default). It reduces the CPU clock and multiplier when the system is idle. Just a power saving feature. Your system will run at full speed (3.6) when there is load on the CPU. Do not worry about the idle temps. They are correct.
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Mythius101 View Drop Down
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Posts: 134 		  Quote Mythius101 Quote  Post ReplyReply bullet Posted: 08 Feb 2008 at 4:43am
That's the same setup I ended up with!




Edited by Mythius101 - 08 Feb 2008 at 4:44am
Vista Home Premium 32
Core 2 Quad Q6600
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Creative Labs X-Fi Fatal1ty XtremeGamer
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Roger View Drop Down
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Posts: 26 		  Quote Roger Quote  Post ReplyReply bullet Posted: 08 Feb 2008 at 8:19am
SWEET!!

Big%20smile Big%20smile Big%20smile Clap Clap Clap

Edited by Roger - 08 Feb 2008 at 8:19am
Ultra Case - Q6600 3.2GHz - 750W PS - nVidia 780i SLI MB - 2GB DDR2 800mhz SMS2 - 8800GTS 512mb - 320GB WD HD - Onboard Audio - Dual DVD's - Stage 2 Cooling - Vista Ultimate
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Bill the Cat View Drop Down
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Posts: 1150 		  Quote Bill the Cat Quote  Post ReplyReply bullet Posted: 08 Feb 2008 at 8:29am
Originally posted by Tyler Lowe

The idle temps are fine. The Vcore is a bit higher than I might go, but still acceptable for a quad. You GO stepping owners have me jealous.
 
I've gotten the impression in the past that Tyler is more knowledgable and up to date about this stuff than I am, but I believe the maximum operating voltage for the CPU is 1.5 V (it might be 1.55). Beyond that point, Intel doesn't guarantee that the chip will work at all, and as you approach the limit, you may be shortening the life of the CPU signicantly. How signicantly? Beats me. Maybe the life span goes from 10 years to 3. Maybe it's not nearly that extreme.
 
I have to set my Vcore = 1.4 V in the BIOS to get my CPU to run reliably at 3.6 GHz. CPUz actually reports Vcore as only 1.36 V at idle. I often feel like I'm pushing it too hard, but I've decided I don't care if I burn out the CPU in a few years.
 
Again, I'd suggest getting Prime95.exe to put a load on your cores while you look at the temperatures with Coretemp.
 
I'd be curious to hear from DSO what their official position is on overclocking core temps and Vcores. Maybe it's too complicated with all the different CPUs around.  Anyway, you have to assume they believe that their overclocking results in a machine that will run reliably for at least 3 years.
 
Notice Mythius101's Vcore is 40 millivolts less than yours. That's significant, or at least not insignificant.
 
Oh yeah.... I've read benchmark tests lately that suggest that anything faster than 2.2 GHz has very little impact on game performance.


Edited by Bill the Cat - 08 Feb 2008 at 8:36am
3.6 GHz E6850,       4 GB RAM, GTS 250,   TJ9, Win 7 64-bit
4.4 GHz i7 3930K, 16 GB RAM, GTX 670, 550D, Win 7 64-bit
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Tyler Lowe View Drop Down
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Posts: 0 		  Quote Tyler Lowe Quote  Post ReplyReply bullet Posted: 08 Feb 2008 at 12:06pm
Bill, you're right about the voltage limits, but look carefully at the two CPU-z screens. V-Droop is going to start to kick in when that 9x multiplier gets going. At a 6x Multi, it will be just a touch less pronounced, and  you're still dealing with some fluctuations in reported Voltage in CPU-z. The Voltage we're looking at might be at the upper end of those fluctuations. I would guess the CPU is set to at, or just a hair over 1.5V in the BIOS (possibly ~1.525). Again, higher than I would operate at every day, but I don't replace my computers every other year and I am on air.

The temps are absolutely in the safe zone for a Quad.

From the thread at Tom's Hardware by Computronix:

Scale 2: Quad
Q6x00: Tcase Max 71c, G0 Stepping, Tjunction Max 100c, Vcore Default 1.372, TDP 95w, Delta 10c
 
-Tcase/Tjunction-
--70--/--80--80--80--80-- Hot
--65--/--75--75--75--75-- Warm
--60--/--70--70--70--70-- Safe
--25--/--35--35--35--35-- Cool

Oh, and I will add one more screen to look at. Apparently my case cooling improvements had a more pronounced effect than I had anticipated on my ability to overclock the CPU. The AC Freezer 7 Pro has only a 130W TPD so I wouldn't want to put this under load at this speed, but there's another example.




Edited by Tyler Lowe - 08 Feb 2008 at 12:32pm
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