Hyperx hx318ls11ibk28 is a kit of two 512m x 64 bit 4gb ddr3l 1866 cl11 sdram synchronous dram 1rx8 low voltage memory modules based on eight 512m x 8 bit ddr3 fbga components per module total kit capacity is 8gb each module kit has been tested to run at ddr3l 1866 at a low latency timing of 11 11 11 at 135v or 15v jedec standard 135v 128v 145v and 15v 1425v 1575v power supply vddq 135v 128v 145v and 15v 1425v 1575v 933mhz fck for 1866mbsecpin 8 ind