ECS A790GXM-A Black Series provides some overclocking options, including:

• GPU internal clock: From 150 MHz to 2000 MHz in 1 MHz increments (under “Advanced Chipset Setup”).
• Base clock: From 200 MHz to 355 MHz in 5 MHz increments.
• CPU voltage: +20 mV (+0.020 V) to +300 mV (+0.300 V) in +20 mV (+0.020 V) increments.
• Memory voltage: +10 mV (+0.010 V) to +150 mV (+ 0.150 V) in +10 mV (+0.010 V) increments.
• North bridge (NB) voltage: +5 mV (+0.005 V) to +75 mV (+0.075 V) in +5 mV (+0.005 V) increments.
• South bridge (SB) voltage: 1.20 V to 1.35 V in 0.05 V increments.
• Side port voltage: 1.8 V to 2.1 V in 0.1 V increments.
• Full memory timings configuration.

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Figure 7: Overclocking options.

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Figure 8: Memory timings adjustments.

With this motherboard we could increase the base clock from our Athlon X2 4600+ from 200 MHz to 230 MHz with the CPU running stable, even though at this configuration we could see some artifacts on the video when in 2D mode (3D mode ran just fine). Under this overclocking our CPU was running internally at 2,760 MHz, a 15% increase from its default clock rate of 2.400 MHz. This is the same overclocking level we achieved with ECS GF8200A Black Series.