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My overclock, suggestions, advice, and opinions please - Page 2

post #11 of 27
Quote:
Originally Posted by Lifeshield View Post
Edit: Clocked the Northbridge to 2750 and it's running pretty stable so far under Prime95. Should I try to hit higher or leave it as it is?
I would leave the northbridge where it is right now; 2750 is a very good speed for the NB to be at. What voltage are you running to the CPU-NB right now? I would think ~1.35-1.4v would be more than enough for 2750mhz.
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post #12 of 27
Thread Starter 
The voltages are all set to auto. I haven't (I don't dare, lol) set any of them manually.

I have had no errors so far in Prime95, or any issues with my rigs stability as of yet, though testing still has a fair way to go.

Probably going to leave it in Prime95 overnight just to be safe.

Edit: Newb question. My RAM speed is 833mhz viz CPU-Z, am I correct in saying that, because I'm using DDR3, to get my accurate speed I am supposed to double this figure?
Edited by Lifeshield - 5/16/11 at 2:48pm
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post #13 of 27
If CPU-z is reading your ram as 833mhz, then it is actually running at 1666mhz; you just double it.
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post #14 of 27
Thread Starter 
Quote:
Originally Posted by HobieCat View Post
If CPU-z is reading your ram as 833mhz, then it is actually running at 1666mhz; you just double it.

Thanks.
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post #15 of 27
You're welcome
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post #16 of 27
If you're running 4.0GHz on 1.45 volts (probably ~1.47 in the BIOS), you have a very nice (lucky) chip indeed To get 4.1 out of my 970 I have to put almost 1.5V through the chip, and 1.275 through the NB (at 2600).

You should aim for a NB of 2600-2800. That seems to be the best for the Phenom platform. You may need to up the voltage - if you've left it on auto, it will be unstable at these speeds. You may not see it within 3 hours of prime, but it will be unstable 1.25-1.35 is recommended.

And on the note of prime - 3 hours does NOT make your overclock stable. I was running my 970 at 4.2 ghz, and it was stable for ~8 hours of prime, and then the 3rd core always failed - no blue screen, just an error in prime. Despite this, I couldn't play more than 1 hour of Anno without a crash. No blue screen once again. You really must run prime for at least 12 hours (24 is ideal) to test your OCs.
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post #17 of 27
Thread Starter 
Thanks for the advice.

On auto the CPU voltage would fluctuate between 1.45 and 1.47 at 100% load.

Set all of these manually and testing in Prime95 overnight.

FSB: 250
Multiplier: x16
CPU Voltage: 1.45
Northbridge: 2750
Northbridge Voltage: 1.25
Hyper Transport Link: 2000
Edited by Lifeshield - 5/16/11 at 4:40pm
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post #18 of 27
Thread Starter 
Didn't work. Got an error during Prime95. DIdn't BSOD, or freezer or anything, just failed the test.

Rolled back to my last stable overclock, and ran that for 11 hours and haven't had any errors at all. So going to stick with that for now until I get more time to sit down and do all the testing properly.

Many thanks and plus reps to everyone who has offered helpful advice so far. I've actually learnt alot from this thread thanks to advice given that has led me into other areas of research.
Edited by Lifeshield - 5/17/11 at 5:17pm
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post #19 of 27
Thread Starter 
Ok so I'm back on this!

I'm currently testing in Prime95 the following that have been set manually...

Clock speed: 4080

FSB: 255
Multiplier: x 16.0
Voltage 1.5 (drops to around 1.452-1.463 at 100% load)
Northbridge: 2805
CPU NB Voltage: 1.35 (currently bringing this down via testing).
HT Link: 2080
HT Width: 16 bit
HT Voltage 1.20 (minimum)

Core temperatures 44-45 degrees.

I haven't touched anything else like DRAM or any of that stuff. Just what you see here. I'm leaving all that until I get this all nice and stable.

Going to try and bump the multiplier up one more to round it off at 4.2ghz once I have voltages for the current overclock low and stable aswell.

Thoughts, opinions, advice, and suggestions are most welcome.
Edited by Lifeshield - 6/20/11 at 10:00am
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post #20 of 27
Why is the HT Width 16bit? Seems Like you would want to keep that at 32?
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