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Well if it was gona happen. It was gona happen to me.

wolvotim

wolvotim

wolvotim

Associate
Joined
16 Oct 2004
Posts
734
Looks like I’ve got the only core2duo in existence that doesn’t like to be overclocked.

Ive got a E6600 and over the past 2 months ive been trying every which way I can to overclock it i can and it looks like its hit a wall at 2.8ghz.

I was hoping for 3.2 but it absolutely will not run orthos sable lasts about 3 seconds. I’ve tried upping the Vcore all the way up to 1.5v with no difference, ive tried slackening off the ram timings to 5-5-5-18 and also setting the ram timings to auto.


So I think ive got to admit defeat and ive give up and left it at 312x9 @ 1.38125Vcore and 4-4-4-12 @ 2.1Vdimm
 
E6600
Gigabyte DS4 (only a couple of weeks old as the old one was RMA'ed)
Geil PC6400
Zalman Aero Flower CPU cooler
8800GTS
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312x9 - 1.38125Vcore - +0.1V MCH - +0.1V FBS - PCI-E 100MHZ - Memory timings 4-4-4-12 - 2.1Vdimm and all the usual settings diabled.

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@2.8ghz It runs about 47-48 degC on load and about 28-29 degC idle

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ive tried it at various FBS and nothing above 312x9 or 350x8 is orthos satble no matter what Vcore i give it. I had it at 356x9 earlyer which is about what i wanted to run it at. I took the Vcore all the way up to 1.5V before i give up and set it back to 312x9 @1.38Vcore
 
Is there a chance my PSU isn’t powerfull enough??? Does overclocking pull that much extra load??

Ive got a 500w enermax liberty and its powering the E6600, DS4, 8800GTS, 3 SATA HDD’s, DVD writer and 2 case fans
 
steve258 said:
Have you tried anymore voltage through northbridge? cuz it sounds like chipsets problem not able to sustain high FSB.
Click to expand...


tried it up to +0.2v. not sure how far to safely go with the MCH and FBS voltages

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how far would you say would be the limmit??
 
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Yeah think I might.

I was just trying to get a definitive answer to what could be the problem. Because knowing my luck I’d sell a perfectly good processor and it would be the ram that was dodgy
 
Hades said:
can't just just drop the RAM speed right down and slacken the timings right off. At least that would eliminate it as the cause of the problem?
Click to expand...


I’ve tried 4-4-4-12, 5-5-5-15 and 5-5-5-18 none of which seem to make much difference.


I had it set to 8x350 (2.8ghz) and it runs fine. Set it to 9x350 (3.15ghz) and it becomes orthos unstable. Now as far as the ram is concerned it isn’t running any faster there is it?? So I’m thinking it must be the CPU.

Its also orthos stable at 9x312 which also happens to be 2.8ghz so I’m thinking that’s where my CPU hits its wall.
 
simonnance said:
If you can take the RAM out of the equation by using 1:1, then that will focus matters on your CPU/NB.

Ideally, overclocks should be done by finding the max for the individual components, then coming to a compromise close to the max speeds of each. OCing more than one component at a time makes life a lot more complicated, and a lot harder to error test.
Click to expand...

the ram is running at 1:1 mate. so it is looking more like a CPU prob

screen.JPG
 
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