Magnvs

Hey people, I'm trying to OC my Q9550 to 4.0 GHz 500FSB on a EP45-UD3L.

I set vcore to 1.31V and it can't pass one cycle on IBT.

Suggestions?

x2s3w4

You can set your CPU voltage as high as 1.36. Where are the rest of your voltages. You'll need to raise your MCH and the others also.

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Magnvs

If I set voltage to 1.36 I'll get temps to 72ºC on IBT

I'll set the other voltages.

I guess UD3P works like the same.

Tristanguy1224

72c on IBT is absolutely FINE.... yes thermal spec is 71.4 or something but they mean 24/7 but because you'll NEVER see temps that high in anything but IBT you're good to go I had to go up to 1.36 to hit 4048Mhz (most likely because of out of tune GTLs..... )
Anyway turn up the volts and let that sucka fly

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AMD 790FX+SLI

umgill45

Head over to this thread:

Gigabyte UD3P owners club

You'll see a myriad of settings for your board that you can try out.
Make sure you read a lot of the posts.
The guys there are pretty much the most experienced UD3-X overclockers you'll find.
Good luck

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Interpolation

Robust Graphics Booster [Auto]
CPU Clock Ratio [8x]
Fine CPU Clock Ratio [0.5]
CPU Host Frequency [475]
PCI Express Frequency [100]
C.I.A.2. [Disabled]
CPU Clock Drive [800mV] PCI Express Clock Drive [900mV]
Cpu Clock Skew [0ps] MCH Clock Skew [0ps]

DRAM Performance Enhance [Standard]
Extreme Memory Profile (X.M.P.) [Disabled]
(G)MCH Frequency Latch [Auto]
System Memory Multiplier [2.00D]
DRAM Timing Selectable [Manual]
CAS Latency Time [4] or 5
tRCD [4] or 5
tRP [4] or 5
tRAS [12] or 15

Load Line Calibration [Enabled]
CPU Vcore [1.300V] to 1.36 max on a E0
CPU Termination [1.240V]
CPU PLL [1.550V]
CPU Reference [0.810V] (auto)
MCH Core [1.320V]
MCH Reference [0.825V] (auto)
ICH I/O [1.570V]
ICH Core [1.100V] (1.2 if you have lot of drives on the SB)
DRAM Voltage [2.100V]

<Advanced Bios Features>
CPU Enhanced Halt (C1E) [Disabled]
C2/C2E State Support [Disabled]
CPU EIST Function [Disabled]
CPU Thermal Monitor (TM2) [Enabled]

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NoGuru

Yes do this!

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