Kingston's KHX18C10T2K4/16 is a kit of four 512M x 64-bit (4GB) DDR3-1866 CL10 SDRAM (Synchronous DRAM) 1Rx8 memory modules, based on eight 512M x 8-bit DDR3 FBGA components per module. Each module kit supports Intel XMP (Extreme Memory Profiles). Total kit capacity is 16GB. Each module kit has been tested to run at DDR3-1866 at a low latency timing of 10-11-10 at 1.5V. The SPDs are programmed to JEDEC standard latency DDR3-1600 timing of 11-11-11 at 1.5V. Each 240-pin DIMM uses gold contact fingers and requires +1.5V.
Main Features:

JEDEC standard 1.5V (1.425V ~ 1.575V) Power Supply
VDDQ = 1.5V (1.425V ~ 1.575V)
800MHz fCK for 1600Mb/sec/pin
8 independent internal bank
Programmable CAS Latency: 11, 10, 9, 8, 7, 6
Programmable Additive Latency: 0, CL - 2, or CL - 1 clock
8-bit pre-fetch
Burst Length: 8 (Interleave without any limit, sequential with starting address '000' only), 4 with tCCD = 4 which does not allow seamless read or write [either on the fly using A12 or MRS]
Bi-directional Differential Data Strobe
Internal(self) calibration : Internal self calibration through ZQ pin (RZQ : 240 ohm ± 1%)
On Die Termination using ODT pin
Average Refresh Period 7.8us at lower than TCASE 85°C, 3.9us at 85°C < TCASE < 95°
Asynchronous Reset
PCB : Height 2.122 inch (53.90mm) w/ heatsink, single sided component