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Need help choosing a 24/7 OC.

Last response: in Overclocking
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April 9, 2010 5:17:12 PM

Here are my spec's.

Intel i7 920 processor (D0 stepping)
Radeon HD 5850
Asus Rampage II extreme
OCZ 2Gx3gb OCZ3P1600LV6GK
Corsair TX 850W
Samsung HD 500G|SAMSUNG HD502H


For the OC's:

I have turned turbo, speedstep, c1e, HT, and Turbo Limit OFF.

On air (Scythe Mugen II) i've achieved:

4.1ghz
195 bclk
vcore 1.25v
21x Multiplier
Loadline Calibration is set to enable.
Everything else is auto.
Highest temp i could get between Prime95, OCCT, Intel Burn Test, and Core Damage was 76°C on Core # 0 with Core Damage.

4ghz
200bclk
vcore 1.225v
20x Multiplier
Loadline Calibration is set to enable.
All others on auto.
Highest temp i could get between Prime95, OCCT, Intel Burn Test, and Core Damage was X°C on Core # 0 with Core Damage. <--Cant remember/didn't write this temp down; I think it was between 71-73°C.

3.8ghz
200 bclk
19x Multiplier
Loadline Calibration is set to enable.
vcore 1.15
Everything else is auto.
Highest temp i could get between Prime95, OCCT, Intel Burn Test, and Core Damage was 64°C on Core # 0 with Core Damage.

Now for the 200bclk OC's I changed CPU and PCIE speed spectrum to Disable. <--unsure on what this does but the bios and manual say to disable for enhanced bclk overclockability.

There are still a lot of settings i dont know much about. I need help understanding: IOH, IOH PCIE, ICH, ICH PCIE, voltages; the different clock skew and speed spectrums; CPU differential amplitude; and Loadline Calibration.

I have DDR3 1600mhz OCZ platinum 3x2gb RAM; keeping that in mind; a 200bclk would put my ram almost perfect at 1600mhz. I'm looking for a 24/7 use OC now. I'm not sure which oc would provide the best longevity of the system if ran continuously overclocked. Any advice?

*edit* seems i have to go with a 199bclk; at 1603mhz my ram wont run correctly. Is there any voltage increase that would effectively stabalize this ram to run 3mhz faster than stock?

More about : choosing

a b K Overclocking
April 11, 2010 5:12:48 PM

Hello :hello: 

Personally i would go for the lowest CPU Speed (3.8GHZ) As you are running less voltage through the cpu which will obviously mean that the cpu will have a longer lifespan. the temperatures aernt too bad either... nice oc-ing

By the way Thats a Kick ass system...

Good Luck :D 
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April 12, 2010 2:32:54 AM

haha thanks, i've kind of been leaning toward 3.8ghz, ty for the input!
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a b K Overclocking
April 12, 2010 3:49:56 PM

No problem

Happy computing :D 
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April 12, 2010 6:45:52 PM

3.8ghz would be a more efficient setting than the 4.0ghz. I wish I had the DO stepping and could get results like that. Unfortunately I got stuck with a CO.
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!