I have 3 crucial sets
1. tracers 1066 - 600 5-5-5-15 spi32m stable on 2.12v, but can't stabilize them under dos version of memtest even at 2.2v - any clues?
2. tracers 800 - 575 5-5-5-15 memtest stable on 2.2, can't make 600 even at 2.5v,
3. lanfest 800 - can't make 600 even at 2.5v, haven't tested lower frequencies.

Any clues guys?