|"My motherboard is GA-945-GZM-S2 rev.6.6"|
The problem is the dash between 945 & GZM...it's not supposed to be there. It easier to do your searches when you input the correct info.
And what is it you want to do with the memory settings? It certainly would help to know which CPU & which RAM you're working with. Are you overclocking? The only settings you really need to play with are listed under the "Frequency/Voltage Control" menu. You need to enable the CPU Host Clock Control, set the CPU Host Frequency where you want it, set the PCI Express Frequency to 100MHz, then set the System Memory Multiplier. This multiplier setting will dictate the RAM speed.
Since you didn't bother to list your CPU or RAM, I can't make any recommendations. But I can tell you this - flashing the BIOS will NOT help. The settings you need are there & were there all along...you just have to know how to use them.