HyperX HX318C10F/4 is a 512M x 64-bit (4GB) DDR3-1866 CL10 SDRAM (Synchronous DRAM) 1Rx8 memory module based on eight 512M x 8-bit DDR3 FBGA components. This module has been tested to trun at DDR3-1866 at a low latency timing of 10-11-10 at 1.5V.