pc unstable 320fsb+ in dual channel mode

[HaRd5TeR]

basically my ocz pc6400 2x512mb gold will not run my conroe e6300 at ANYTHING above 320ish 330ish stable, get errors........


HOWEVER.
if i pop em side by side in slots 1 and 2, sp2004 and the likes run all day????????????????


messed with voltage, set slackest timings, but no go.

mb is an asus p5b vanilla.
any thoughts?
possibly mb bios related? im runnin 309 latest one.
seems stable at <300 fsb.

doin a memtest from dos tonight...

 

[HaRd5TeR]

okay, so i did a memtest86 in dos.......
all ok at stock

raise fsb to 300 and BOTH sticks generate errors, regardless of speed and voltage.


but, put both in at same time in single channel only and all is fine at same FSB????

anyone care to enlighten me???
PLEASE!