mem help

if i get 512mb crucial cas2 ram will i be able to set all the memory setting to the fastest in the bios because ihave unbranded mem cas3 runnin at 148mhz and when all the setting r max i get blue screens or win wont boot(win protection error) and it wont boot at cas2, how many more mbp/s will cas2 give me? iget 450/560 mbp/s on sisandra now
Cheers
Nick

Hopefully you will. Scores look low for a 148MHz CAS3. Here are my scores at a lower MHz also CAS3

I have 3 sticks across 2 PCs that do 150MHz CAS2 no problem at all. Great memory for the price, can't be beat.

My memory scores are still kind've crappy though since they're VIA boards.