I realise it's been awhile, but a bit of an update is in order.

For some reason...after folding for more then 2 weeks 24/7 it is now a great deal easier to work with this memory issue.

The system boots and is fully stable at 280x10 1:1 1T 3-4-4-8 without changing any other DRAM options. The system even boots 100% of the time at 2.5-3-3-6...but is unstable...and not able to make it through a run of Aquamark3 without generating memory errors.

This seems to be a little more typical of an issue now, and I was hoping that someone would be able to chime in with some recomendations that'd stablize 2.5-3-3-6, as a number of tests see a good 20+ fps boost (the openning scene of Aquamark3 and Dragothic low detail in 3dmark2001) merely from being able to bench at CAS2.5...and I'd really like to see what kind of scores I'll be looking at in the end.

Any ideas?