2 MODULES LOW VOLTAGE MEMORY. ORIGINAL HP

HP 2X  8 GB DDR3L 1600 (PC3-12800) RAM H6Y77UT#ABA 

HP - DDR3L - 8 GB - SO DIMM 204-pin - 1600 MHz / PC3-12800 - 1.35 V - buffered - non-ECC - for EliteBook 820 G1, 840 G1, 850 G1; ProBook 430 G1, 450 G0, 45X G1, 470 G0, 470 G1; ZBook.