3 tb only showing 2tb in gpt

[tonysmallt]

I have read and understood the instructions for this problem but..the hard drive only shows 2tb there is no unformatted space and it is gpt ive also tried Linux to format with gparted and ive also tried recovery software to try to find an old 3tb setup to no avail
any suggestions would be most welcome
its on an i7 asus p8z77-v lx motherboard with 2 other 3tb drives attached and working

 

[popatim]

Sounds like your motherbd does not support large drives. There may be a drive overlay available for you that will show the missing 1tb and allow you to use it as another drive.

wait - what do you mean by "the old 3tb setup"?

 

[tonysmallt]

ive updated the original question stating the motherboard
thanks for the reply though
the old setup was a 250gb ssd boot drive with 3 x3tb extra storage win 7 I took out 1 x 3tb and added a new 2 tb put in a new new i3 machine ,formatted them to run vortexbox (fedora 19) so that would be ext 2,3,4 partitions basically it was a Linux machine to run plex media server.
linux only ever saw it as 2tb so I put it back in the windows machine which now only sees it as 2tb
ive taken a second 3tb out of the windows machine and formatted to Linux ext 4 where it is happily running at 3tb

so I have a win 7 machine running 250 gb sdd 1 x 3tb running fine
Linux machine 2 tb boot 3tb extra storage running fine
1 x 3tb that thinks its a 2tb being shuffled between all my computers trying to sort it out