I've purchased the Samsung 840 SSD, does it include a SATA 3 cable?
I bought the Basic version, also if I can remember when I bought the Gigabyte Z77 D3H motherboard, it came with a SATA 3 cable, but do you know what colour cable it was?Which version,
Basic - http://www.overclockers.co.uk/showproduct.php?prodid=HD-161-SA&groupid=701&catid=2104&subcat=1427
Desktop and notebook - http://www.overclockers.co.uk/showproduct.php?prodid=HD-164-SA&groupid=701&catid=2104&subcat=1427
The later includes a cable, your motherboard should have come with SATA cables?