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Some advice on overclocking a 3.2C

post #1 of 15
Thread Starter 
Hello,
I have a 3.2C, the low cap version, i don't remmeber how many there are but there definitely aint 30 caps on my cpu.
I've got an abit ic7-g, 4x256MB of the corsair PC3200 CL2 stuff, 400W UsiCase PSU, think that's about it.

Anyway, I am running it at 3.6Ghz 1.625V, but anything over 3.6GHz and it seems to crash windows badly, either I get a blue screen on bootup, or the computer just freezes when it gets into windows and I have to push reset.
Running it at 3.6 has barely made any difference to the temperature, so can I keep pushing the cpu core voltage?

I tried slowing down the memory using the multipliers in BIOS, but it didn't help.

I had a 3.0E in there before which ran a little hot, but I could push it to 3.6GHZ without raising the voltage at all. Anything over that and the monitor wouldn't even come on when I booted, but I never tried increasing the voltage with the prescott.

Is there any tips for getting this 3.2C past 3.6GHz, 400MHz is a very poor overclock I think. Can anyone explain what this volt mod crap is all about also.

Cheers.
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post #2 of 15
First of all help us help you by filling out your system specs. Go into user cp by clicking on user cp in the top left. Next in the left side bar click edit sytem specs, fill in as much as you can.

Sounds like maybe your ram is holding you back? I don't know what ram you have but try increasing your vdimm to 2.7 or 2.8 and loosen your timings if they are really tight.
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post #3 of 15
Thread Starter 
I've filled out as much as I can. Increasing the DDR voltage doesn't help. The memory timings aren't tight, just the BIOS default.
I'm starting to think that exchanging the CPU for a Prescott 3.0GHz was a waste of bloody time. I didn't exactly exchange it, I bought the Northwood, I had a spare case sitting around so I've built up the 3Ghz and I'm planning to sell it so that the money spend on the computer + the 3.2C chip is covered by the selling price of the 3ghz system.
Does anyone think I should just sell the 3.2C chip on ebay and try to get hold of the 30 cap 3.2c chip? or just keep the prescott and sell the 3.2C. I got it pretty cheap I think.

OR

I can get a sledgehammer and smash the piece of crap cpu which won't figgin overclock. I HATE IT!!! lousy worthless piece of s**t. Why couldn't intel put 30 capacitors on my god damn chip, those cheapskate bastards.

I don't have an anger problem by the way :-)
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post #4 of 15
I would set the cpu core voltage at 1.7 and set your memory to a divider of 5:4 or 333MHz. If the voltage works at 1.7 then you can start to prime95 stability test for lower voltages. Once you fail prime you can re-raise the voltage by one (.05) increment.

I have taken the 3.2 30 capper to 3.8GHz and that was the maximum on air and a Zalman cnps7000cu cooler. I have had 3.2E's that would not make 3.8GHz. Of course these numbers are solid stable numbers of 24hour dual primed.

Are you using the stock cooler?

R
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post #5 of 15
Thread Starter 
zalman 7700cu ,big copper heatsink with 120mm fan, just for a visual description if you haven't heard of it.

Ummmm, I will try your suggestion. Don't have prime installed, I just boot let UT2004 run in spectator mode for a while. If the processor isn't stable it will usually crash right when it gets into windows or I'll get the blue screen error during boot up.

I suppose it doesn't matter too much anyway. I've always been an intel person, but I think in a 6 months or so I might go AMD for a change.
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post #6 of 15
What vcore are you running?
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post #7 of 15
Thread Starter 
when overclocked i had this following config
cpu vcore - 1.625
DDR - 1.7V
think that's it
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post #8 of 15
Thread Starter 
Quote:
I would set the cpu core voltage at 1.7 and set your memory to a divider of 5:4
Do you think it's safe setting the vcore so high?

Also can someone explain why when I set my ram voltage to 2.6 in BIOS it always seems to run at 2.67V, and when I set it to 2.7V it actually runs at 2.77 most of the time?


What do you think the highest vcore is I should use. I set my BIOS to turn the pc off straight away (not shutdown windows) if the temperature exceeds 65C. Is it safe to keep increasing my VCore if there is no chance of the CPU getting too hot?
I'm not exactly sure how that sort of stuff works or can too much voltage destroy the chip from non-heat related issues. Hope that makes sense.
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post #9 of 15
Quote:
Originally Posted by mrpringle
Do you think it's safe setting the vcore so high?
I think that 1.7V is the maximum testing voltage I would use. For 24/7 I would not go higher than 1.65V although many use the 1.7V as the ceiling. Setting it to 1.7V and trying to reach 3.8GHz will tell you if you are at a maximum with that proc. If you make 3.8GHz at 1.7V then you can test 1.675V and 1.65V. If you can't make it at 1.7V then you can drop it down to your stable 3.6.

Personally, the difference between 200MHz is not all that great anyway and with your board there is little doubt of getting past 3.8 on any chip (Prime95 dual stable) on air. You have a 12 cap processor. The cap is short for what is called a capacitor, used normally in an electronic circuit to smooth out fluctuations in voltage. The 30 cap versions are the Gallatin core and are actually failed Extreme Edition processors. Less voltage needed and often a bit higher of an overclock.

Not many can make the 4.0Ghz (on air) with the socket 478 motherboards at any rate. You should get around 50C load (6 hours prime95) on that processor.

What program are you using to read your dram voltage? What are your normal idle/load temperatures with the cpu at 3.6GHz?

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post #10 of 15
Thread Starter 
I've got speedfan installed, but a lot of people say the ic7-g mobo reads 10-12C higher than the ASUS mobo's.
My load temperature is sometimes 58C, I just installed prime95 last night and ran it for 10 hours, At 2.6Ghz the temps are maybe 2C higher. Haven't tested it under prime95 yet at 3.6ghz. Just tested it with decreasied memory timings at 3.2ghz.

Even when I'm in BIOS the DRAM voltage is always above what I set it. Sometimes by 0.05V, sometimes even 0.1V when the cpu/memory is under stress.

Do you think a 400W psu is enough for my system?

Quote:
Personally, the difference between 200MHz is not all that great anyway
yeah, you're right, if I can get it stable at 3.6ghz, it's not really worth the extra effort for another 200mhz.

thanks for all your help.
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