Decided to read the PDF for the memory
0.11nm and max of 3.6v are the important specs
here are my 24/7 new stable settings

243FSB 1:1 2.5-2-3-6 2.8v
I can run lower volts, but im running my mother board in Ultra-PAT mode, so I had to up the voltage to 2.8v. But it is rock solid.
This ram with looser timings and up to 3.6v would get past 260 easy