Memory freq and board freq

want to know that if some one is using 800MHZ (fsb) processor like E2140 and the motherboard is d945gccr which supports 533 mhz memory bus (max) so are we loosing some speed bcz of this frequency speed (800 mhz v/s 533 mhz) and will we get higher speeds if we use the same memory modules (which are of 800 mhz) with the mobo which supports 800 mhz for memory ?

yea sure

performance will increase with a faster RAM..