Hyperx impact 4gb 1x4gb memory module 1866mhz ddr3l cl11 sodimm non ecc unbuffered 135v hyperx hx318ls11ib4 is a 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 this module 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 fc