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First time OC for 955BE

post #1 of 24
Thread Starter 
ahh I had a long post, but I wasn't logged in so I lost my message >,<<br />
Short and sweet.

I built a computer for the first time. Only trouble I had was the damn Noctua NH-D14 fan. I knew it was big, but got damn that fan is a pain to work with. I had trouble mounting the damn fan on the risers, because there's not much extra space to screw it on to and the fan is pretty got damn heavy imo. My computer wouldn't boot at first, but I found out it was because I had bad cable maintenance. POST kept saying "CPU fan failure" so I found there was a wire tangled in the Noctua fan.

Anyways got into BIOS and quickly put in the 1600 DDR3 ram because it was at 1333. Then I wasted no time slowly increasing the clock speed and instantly put it at 200x19 v.core at 1.5v and got 3.8 GHz. I ran it for a while and got temperatures of only 30c. So the fan is obviously set right.

The question is what's the average voltage needed for 4 GHz? Is it below 1.5v? How much voltage is required to crank it up to 200x21 and get 4.2 GHz. I just left it at 3.8 GHz because I didn't want to break anything or mess around with resetting the CMOS. I would like to get 4 GHz+ though even it involves me playing around with multiple BSODs/CMOS battery resetting.

Oh yeah and what's the usual Northbridge Clock ratio you guys set when your CPU clock is 4 GHz +? Right now I have my NB clock ratio at 2400 and I didn't touch the voltage. Should I bump that higher and raise the voltage?
Edited by Silentness - 4/2/11 at 6:22pm
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post #2 of 24
I think you've pretty much maxed it out. I'm pretty sure 1.5 is the top safe voltage.
post #3 of 24
Average CPU Voltage is 1.475-1.55v for 4.0ghz from what I seen.
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post #4 of 24
you will need at least the vcore on 1.462500 in bios 1.5v under load to hit 4g and stable maybe a bit more, and aim for 2600-2700 as a start for cpu/nb
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post #5 of 24
Thread Starter 
Ok so I went ahead and quickly punched in 20x200 giving me a 4 GHz overclock. I also went ahead and bumped up the NB voltage to 1.4 and bumped up the NB/CPU clock to 2800. No problems and I'm still getting just 30c for temperatures.

Any suggestions on what I should crank up? Should I start increasing the base frequency past 200? Should I go for 3000 NB frequency? I feel like with my CPU fan and chip I could go a lot further.

I don't want to stress test the chip. Mainly it's just for general internet usage, videos, streaming, SC2 (cpu intensive), etc.
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post #6 of 24
So how do you propose error testing without stress testing?
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post #7 of 24
Just use prime95 it's free and there is almost no chance of doing anything bad to your computer with it. In addition most of the time if your not unlocking any cores you pretty much know your oc is stable after around 2 hours, and rock solid if you can go past 24.
    
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post #8 of 24
Thread Starter 
Ok I went ahead and used Prime 95. It got an error like instantly *face palm* Minute later... BSOD.

So do I just read the stress test.txt and it tells me what the failure was? What does that usually mean? I need to increase the voltage?
________________________

Update: I tried Prime 95 again. This time I decided to put the BIOS back to default. I decided to change only one variable at a time. So I typed in 20x200 and Vcore at 1.5 voltage. Ran Prime 95 and I ran it for about 25 minutes successfully at 4 GHz. I probably could lower the voltage a tad bit, but I'll work on that.
Edited by Silentness - 4/3/11 at 5:04am
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post #9 of 24
hey mate, you have almost same motherboard as me. Take a look at my OC profile
Ref clock 200 MHz
CPU x20 (1.42V)
CPU/NB x13 (1.3V)
HT link x10
DDR 800 MHz (1.65v)

Prime 9h stable 0 errors
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post #10 of 24
Thread Starter 
Yeah I think I'm pushing too much voltage for 20x200. (1.5v) I'm a slowly lower my Vcore.
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