Specifications and Package
From Kingston: "Kingston’s KHX1866C9D3T1BK2/8GX is a kit of two 512M x 64-bit (4GB) DDR3-1866 CL9 SDRAM (Synchronous DRAM) 2Rx8 memory modules, based on sixteen 256M x 8-bit DDR3 FBGA components per module. Each module kit supports Intel XMP (Extreme Memory Profiles). Total kit capacity is 8GB. Each module kit has been tested to run at DDR3-1866 at a low latency timing of 9-11-9 at 1.65V. The SPDs are programmed to JEDEC standard latency DDR3-1333 timing of 9-9-9 at 1.5V. Each 240-pin DIMM uses gold contact fingers. The JEDEC standard electrical and mechanical specifications."
Below are the specifications:
- JEDEC standard 1.5V (1.425V ~ 1.575V) Power Supply
- VDDQ = 1.5V (1.425V ~ 1.575V)
- 667MHz fCK for 1333Mb/sec/pin
- 8 independent internal bank
- Programmable CAS Latency: 9, 8, 7, 6
- Posted CAS
- Programmable Additive Latency: 0, CL – 2, or CL – 1 clock
- Programmable CAS Write Latency(CWL) = 7 (DDR3-1333)
- 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°C
- Asynchronous Reset
- PCB : Height 2.401” (61.00mm) w/ heat spreader, double sided component
And the XMP Parameters:
- JEDEC: DDR3-1333 CL9-9-9 @1.5V
- XMP Profile #1: D3-1866 CL9-11-9 @1.65V
- XMP Profile #2: D3-1600 CL9-9-9 @1.65V
The packaging continues Kingston’s branding with the HyperX series. No fully sealed clamshell here, so you don’t need to destroy everything just to get at the modules.

Let’s take a closer look at the modules.