Yesterday I got a PQI 3200-2048 DB kit for a test...
Well, I'm disappointed, the memory goes up to FSB225 1:1 MemTest stable, but it won't do even 255MHz 5:4 = effective 204MHz, moreover, I couldn't make it start at 282MHz 3:2 = effective 188MHz, which is underclocking...

What is different when running dividers? Why some memories don't like them?

I hasn't yet decided, should I be disappointed by the RAM or by my mobo, which had troubles running few other memories using FSB dividers too.
I'm a bit tired of all this, but in a week I'll get few other PQI 3200-2048 DB for testing...