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My new 8750 BE is a really bad overclocker?

post #1 of 45
Thread Starter 
So I just got my brand new 8750, and I'm a little disappointed.


If I use the 15x multi, it needs 1.42v to be stable in Vista x86, and it isn't stable at all in Vista x64.

I've tried some other stuff, including giving the southbridge more voltage.

Does anyone have any ideas? I feel like the issue is with a setting on my mobo, not my chip.
post #2 of 45
Thread Starter 
Another reason why I think it is the mobo is that I can't raise the ref clock at all.

Regardless of the multi, if everything else is on auto, it won't even post.


There must be something that is undervolted at the auto settings.


Does anyone have any ideas?
post #3 of 45
thats really weird. i got an 8650 at 3.2GHZ with a refclock of 280 at 1.36Volts.

did you disable cool&quiet and virtualization?

heres a cpu-z screenie

also. did you clear CMOS when you switched processors?
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post #4 of 45
Thread Starter 
Yeah, cool n' quiet and virtualization are disabled, and I did indeed clear the cmos.

I will clear it again though.

Are all of your voltages manually entered?

I don't know what to do about the NB and HT multis. They are on auto right now. What is the rule of thumb for dealing with them?
I know I shouldn't let the HT get ridiculously high, but what about the NB?
post #5 of 45
Your mobo is SB600
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post #6 of 45
Quote:
Originally Posted by sLowEnd View Post
Your mobo is SB600
Yeah but it should still clock much better than that.
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post #7 of 45
Thread Starter 
I know


No ACC for me.

I should still get an easy 3 GHz or higher though.
post #8 of 45
everything is bios controlled. keep your HTlink and NB around 1800mhz (9x multiplier)
the HTlink can equal the NB clock speed. but must never surpass it.

if you up your ref clock to 220. it would be 220X9=1980. with a voltage increase on your HT and NB it should be stable. but it would be best to drop the HT and NB multipliers to 8x or 1600MHZ depending on how your bios displays it.

~1.3ish volts should be enough to get any phenom to 3GHZ but you may need a little more to compensate for Vdroop .

my board has a .04 volt vdroop. i have it set at 1.4volts in bios and it displays 1.36 in windows do to the vdroop.


also. before i got my 790GX mobo. i had an asus m3n78-VM which is a mATX board with an Nvidia 720a chipset and i had my 8650 at 3GHZ on it. so event without ACC you should still be able to get a decent OC from your 8750.

keep working at it. you should get 3.2 easily with that chip.
Edited by hxcnero - 12/17/08 at 6:40pm
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post #9 of 45
Did you play with the HT/NB settings? Could help you some.
    
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post #10 of 45
drop your ht/nb to 1500 while finding a good clock for your processor.
drop your memory to 667 while finding a good clock for your processor.
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