I went through the A8N-VM CSM's manual too, and one thing I don't see is voltage adjustment for the memory. On an A8N-E, you'd get to that by going to Advanced > JumperFree Configuration and then setting the Overclock Profile to Manual, and that would unlock the items that are greyed out, including voltages.
On the A8N-VM CSM, the manual shows the JumperFree menu, and says "The following item appears only when you set the AI Overclocking to Manual" and then it lists the CPU bus speed. Period. No voltage adjustments listed there. I think that's foolish of Asus, because there IS memory out there that will freak on just 2.6 volts (which I assume is what the board defaults to).
Still, I may get one to try out. But I will make sure to get good-quality "vanilla" memory like Crucial PC3200, something that's not going to need 2.7-2.8V to stabilize.