I have an intel SSDSC2KW240H6 which comes in at 256 Gb which post format only has 128 Gb available to it as seen in below screenshots:
http://imgur.com/a/XywVq
http://imgur.com/a/XywVq



Well, Googling the model number you provided indicates that it should be a 240GB drive. Perhaps you got a mis-labeled unit. What does it show for capacity in the BIOS?