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attempting to overclock the right way for once.

post #1 of 10
Thread Starter 
Currently I have set the north bridge and HT link to 1.5ghz and bus to 250. Multi is set to 15x250 = 3750 ram is set to 1333 with 9-9-9-26. I am then booting into windows and using turbo v to adjust bus speed and testing stability with occt small data set. Am i doing it right so far? How high should i go with my NB and how do i test north bridge stability, what is safe in the way of bus, and if I cannot get past 3.85ghz on core zero should i just keep the multi lower on core zero than the other three cores?
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post #2 of 10
Thread Starter 
Ok now i have bus at 260 and multi at 15 for core clock of 3.9. However my ram can only go at 1384 or 1772. Should I try to stabilize the 1772 or tighten the timings at 1384? Also i have the cpu-nb at 2.85 the next step is 3.1, is 3.1 safe and am i ok to leave the voltage on auto as it is currently at 1.5v on auto.
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post #3 of 10
Ok, try to keep the HT link within 200mhz of 2000mhz. More northbridge speed = huge gains, try to keep the ram around 1333, and 1.5v seems like a lot for the CPU-NB voltage. To test northbridge stability, I find it is pretty tied to the cpu in terms of stability testing, so running P95 should work to test stability. It would either crash my rig, or give me a rounding error when my NB was unstable. You should only need up to 1.4v on the CPU-NB or less for 4ghz on your CPU. I got mine at around 1.35 for 4ghz.
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post #4 of 10
Thread Starter 
The reason i lowered the ht is because i was using turbo v to increase the bus however I cannot use turbo v if i boot with bus speed above 250. Thats ok because im not using turbo v anymore. If i were to set my bus to 300 and my multi to 13 i would get 3.9 ghz. If i did this would i most likely be stable being that i am at 260x15 = 3900 or does it not work like that at all?
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post #5 of 10
Thread Starter 
Set cpu/nb voltage to 1.35 and now it is running linpacks at 51.3 GFlops as it did before so i think i didn't need 1.5v that it was defaulting to.
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post #6 of 10

Get the bus clock down to about 240 and use x6.66 to get DDR3-1600 operation, but 300MHz bus clock works too with x5.33.  If you're going to be running DDR3-1333 at all, lower the timings to at least CL7-7-7.

post #7 of 10
Thread Starter 
Ok when i set it to 16x240 i can boot if the cpu-nb is at 2160 hyper transport at 1920 and the ram is at 1280, it will boot. With cpu-nb any higher and it wont even post. Do i need to increase the nb voltage, currently i have the cpu/nb voltage at 1.35 and the nb voltage on auto. Should i touch the nb voltage or just leave it. Also what does nvidia core calibration do and what settings should i have?
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post #8 of 10
Isn't the 555 a BE? Why not have lower FSB and use multipliers? OC like the Intelzz
i7 thing
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i7 thing
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post #9 of 10
Thread Starter 
I have tried using just the multi and can only get it to 3.7 stable. When I did 260x15 I got 3.9 stable. Just wondering when did multiplier overclocking become the Intel way? As far as I know the unlocked multi has always been an AMD thing.
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post #10 of 10
Here's some timings for DDR3 1333MHz -> 7-7-7-20(or even 21 for more stability)-27(30 for more stability) with 1.65v on ram.
    
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