Per too many users too ignore, the 506 firmware drives appear to be manufacturered in a different facility entirely, and may even be bait and switch internal hardware change as the measured speeds differ greatly from early production units and current ones.Per Kingston: Drives with firmware version 505 or 506 both meet advertised specifications. The firmware version has no bearing on the speed of the drive and drives typically ship with the latest firmware that has been qualified.
I dunno, I thought so at first too. But once you start installing a lot of games and some bigger programs and what not, you can fill up a 250gb drive in no time. I just updated my 250gb 830 to a 750gb 840 for that reason, now that they are cheaper.I put a pair of these in for ZFS ZIL purposes back in October when these hit $80. Does the job, although wayyy more space than needed.