Gigabyte GA-MA78GM-S2H (AMD 780G)
Overclocking and stability
Now let's look at the power converter. It uses a 4-phase power scheme, in which there are three 470 mkF and eight 820 mkF capacitors.
All the overclocking tools gathered in the "MB Intelligent Tweaker" section:
First off, Gigabyte MA78GM-S2H allows adjusting the HTT speed within 200 to 500 MHz in 1 MHz increments.
The user can change the HyperTransport bus multiplier on the section between the NB and CPU:
as well as the bus width:
Besides, the PCI Express bus speed is adjustable within 100 MHz to 200 MHz in 1 MHz increments.
If necessary, the user can change the CPU's multiplier (which is locked towards the increase in all AMD processors):
It is also easy to see that the board supports fractional multipliers.
The next feature allows adjusting the CPU voltage (Vcore) within 0.8V to 1.9V in 0.025 V - 0.05V increments.
"DDR2 Voltage Control" raises voltage on the memory modules:
The maximum Vmem increment is 0.3V, with the adjustment step being 0.1V. The user can adjust voltage on the north bridge (with this increment) by the same value:
Now on to the practical overclocking. With Athlon 64 3500+ (Orleans), the board showed very good results: a stable operation at HTT=312 MHz.
Even up to 300 MHz the board was running stably without raising voltage on the chipset. Quite a good result for a value motherboard based on the integrated chipset. But overclocking is not finished at that: the board allows adjusting the frequencies of the integrated graphic core within 150 to 1100 MHz.
After rather long tests we found the limit for this particular board specimen: the board retains its stable operation at the core speed no more than 680 MHz. Recall that the nominal core speed is 500 MHz. The core is overclockable only through the BIOS, since in the proprietary utility Easy Tune 5 Pro the Graphics tab is still inaccessible:
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MoBo:
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VGA Card:
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CPU & Memory:
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