On my desktop i have 2 gig of memory made up from 1 gig x pc6400 and 2 x 512 pc6400. someone told me this would more than likely slow the pc down as it's wasn't working in dual channel mode.

i thought i'd check it out at PC world, in the hope that i'd actually bump into someone who would know, but als no, the spotty cunnox said "oh i dunno mate"

Anyone enlighten me before i spend dough? Running Vista ultimate (QUAD Core)BTW