ECS AMD690GM-M2 provides some overclocking options, but no memory timings settings. Here are the options you will find on ECS AMD690GM-M2 (May 11th, 2007 BIOS):

• Base clock (HTT clock): From 200 MHz to 232 MHz in 1 MHz steps.
• Graphics Engine clock: From 200 to 500 MHz in 1 MHz steps.
• CPU voltage (“NPT Vid Control”): Auto or 0.5500 V to 0.7250 V in 0.125 V steps, 0.7350 V, 0.7500 V, 0.7625 V, then 0.800 V to 1.350 V in 0.025 V steps.
• Memory voltage: +0.05, +0.10 V and +0.15 V.
• CPU clock multiplier (“NPT Fid Control”).

As you can see this motherboard does not have an option to lock the PCI Express clock, so when you increase the CPU base clock you will automatically increase the PCI Express clock as well. So your overclock may be limited by the overclocking limit of the devices connected to the PCI Express bus.

On the other hand, this motherboard has a unique option found under Advanced Chipset Features menu that allows you to change the graphics engine clock rate, allowing you to overclock its on-board video. As mentioned before AMD 690G graphics engine runs at 400 MHz. We increase this option up to 500 MHz however we saw no performance increase on the programs we used to measure video performance. A pity.

On this motherboard we could increase the CPU base clock from 200 MHz to 215 MHz, making our Athlon 64 X2 5000+ to run at 2,795 MHz, a 7.5% increase over its original clock of 2.6 GHz.

We didn’t play with the voltage configurations, so with time and patience you may achieve a better overclocking with this motherboard.