Regarding stability, I have 2G (2-1G GSkill DIMMS) that are supposed to run at 2.6-2.75 volts, along with an Althlon64x2 3800. Note my board hasn't been flashed yet, due to the "unknown chipset" problem. However, just wanted to let everyone know that the BIOS defaulted to 2.55 volts. Once I increased to 2.7, things started working better.
FYI
Before I increased the voltage, the system was completely unreliable. This is a new system, so no OS is installed. I tried to boot the Win2k install CD, but all it did was BSOD. I have several Linux distros, and none of those would boot from CD either. Much less install.
Anyway, I checked the voltage settings, increased them to 2.6 - then 2.7. Once I hit 2.7, I was able to boot my Linux install CDs. In one test, I booted my FeatherLinux CD, started with the option that pre-loads the entire CD to RAM, and messed around with the machine for awhile. I was able to run editors, alter the disk partitions, and so on. Much more reliable. And I never got a single kernel panic (unlike before). Also, with the entire distro cached in RAM, things ran very fast.
However, when I try the Win2K install CD, all it does is BSOD. I'm hoping that the BIOS upgrade fixes this problem. I haven't done any research on Win2k/hardware issues yet.
But if I can't get past the "unknown chipset" problem, then I'm going to have to assume that this motherboard needs to be RMA'd.