Gigabyte ma785gm-us2h OC guide

[LOUISSSSS]

Where can I find a good gigabyte ma785gm-us2h OC guide?
CPU will be the amd athlon II x4 620 propus.

Thanks, I've never oced an AMD before

 

[spinejam]

i've built 2 x2 550BE 'puters w/ that mb and they both run great. both chips unlocked to quad's (B50's) and one o/c'ed to 3825Mhz and the other 3625Mhz.

i just increased the cpu's multi and vcore for my o/c's so it was very simple for me.
(o/c'ed to onboard video to 650mhz as well)

the bios profiles can be loaded / saved by using F11 / F12 keys while in main bios.

 

[heyheybooboo]

Here's the view of the MIT sub-menu.

Under 'Set Memory Clock' select 'Manual' - under 'Memory Clock' drop the ratio from 400 to 333. Lock the PCIe clock to 100MHz.

Under 'CPU Clock Control' select 'Manual' -----> then 'let her rip' using the clock.

At stock voltage & cooling with the clock at 231MHz you will be running 3GHz. IIRC at stock volts and HSF Anand got in the 3.2-3.3GHz range.

For each 10% increase in the NB/IMC speed bandwidth will increase 3-4% and latency will decrease 3-4%. I'll guess you will be good to around 2400MHz NB or so (240MHz clock) without additional NB voltage.

AMD procs are quite voltage sensitive. You will get higher clocks and better stability with setting 'tweaks' as opposed to simply cranking your voltages.


edit: I thinks the latest BIOS is F7 --- it seems to help resume from deep sleep if that is of interest to you.



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[alyarb]

i've built 2 x2 550BE 'puters w/ that mb and they both run great. both chips unlocked to quad's (B50's) and one o/c'ed to 3825Mhz and the other 3625Mhz.

i just increased the cpu's multi and vcore for my o/c's so it was very simple for me.
(o/c'ed to onboard video to 650mhz as well)

the bios profiles can be loaded / saved by using F11 / F12 keys while in main bios.

two callisto X4's is so good. god damn you got your money's worth.

 

[LOUISSSSS]

Here's the view of the MIT sub-menu.

Under 'Set Memory Clock' select 'Manual' - under 'Memory Clock' drop the ratio from 400 to 333. Lock the PCIe clock to 100MHz.

Under 'CPU Clock Control' select 'Manual' -----> then 'let her rip' using the clock.

At stock voltage & cooling with the clock at 231MHz you will be running 3GHz. IIRC at stock volts and HSF Anand got in the 3.2-3.3GHz range.

For each 10% increase in the NB/IMC speed bandwidth will increase 3-4% and latency will decrease 3-4%. I'll guess you will be good to around 2400MHz NB or so (240MHz clock) without additional NB voltage.

AMD procs are quite voltage sensitive. You will get higher clocks and better stability with setting 'tweaks' as opposed to simply cranking your voltages.


edit: I thinks the latest BIOS is F7 --- it seems to help resume from deep sleep if that is of interest to you.



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thanks so what about the HT Link Width and HT Link Freq?
and also what about CPU NB Freq?

 

[nyker96]

I have exact same setup as you do, same board, same cpu.

essentially, change fsb like intel, adjust mem clock to keep ram within spec, adjust HT Link freq to keep it under 2000, although my x4 620 is doing 2500HT and stable but in general keep it under 2000. that should be it. mine is doing 3,25 using 250 FSB currently, default voltage. keep in mind when you put this board on default voltage is does an intelligent voltage adjustment, it boosts voltage to about 1,47v at 100% load compensating for vdroop, so you getting a lot of voltage at load on this board when set to default unless you manually set it.

 

[LOUISSSSS]

^^ what cooler are you using? i have a tuniq tower, but do not have the am2 mounting for it...

 

[heyheybooboo]

thanks so what about the HT Link Width and HT Link Freq?
and also what about CPU NB Freq?

Don't worry about the HT Link width unless you start throwing memory errors when you test for stability. 16/16 is stock IIRC.

As long as the HT Link Freq is slower than your NB/IMC Freq you are good-to-go (essentially, as long as it is faster than your RAMs speed you are not losing any performance). Set (or leave at stock) at fixed 1800-2000MHz and you will be fine.

The NB Freq is determined by a set multiplier X the base clock. The stock setting will be '10' and the NB Freq will increase as you increase the base clock. See above post for performance info.

Not sure how much this applies with the Athlon IIs but you should 'ungang' the memory controller (and disable spread spectrum).

Since you are using the clock freq for your OC you may leave 'Cool & Quiet' on 'Auto' if you wish. You will be able to OC a little higher with it disabled but will lose the power-saving capabilities it offers.






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