Crucial 4GB DDR3 1866 MT/s (PC3-14900) CL9 @1.5V Ballistix Tactical UDIMM 240pin

-Capcity: 4GB - DDR3 PC3-14900 -Unbuffered, NON-ECC, DDR3-1866 -1.5V -512Meg x 64
BLT4G3D1869DT1TX0CEU