AddOn HP 713977-S21 Compatible Factory Original 4GB DDR3-1600MHz Unbuffered ECC Dual Rank x8 1.35V 240-pin CL11 Very Low Profile UDIMM Printable Adhesive Paper AC input frequency: 50/60 Hz

AC input frequency: 50/60 Hz

the bracket mounting holes are positioned at exactly 16in apart

Seamless UC experience UC Certified

60 x 12-24 Cage Nuts

AddOn HP 713977-S21 Compatible Factory Original 4GB DDR3-1600MHz Unbuffered ECC Dual Rank x8 1.35V 240-pin CL11 Very Low Profile UDIMM Printable Adhesive Paper AC input frequency: 50/60 HzAddOn HP 713977 S21 Compatible Factory Original 4GB DDR3 1600MHz Unbuffered ECC Dual Rank x8 1. 35V 240 pin CL11 Very Low Profile UDIMM This HP 713977 S21 compatible 4GB DDR3 1600MHz dual rank unbuffered ECC 1. 35V 240 pin CL11 factory original very low profile UDIMM is 100% guaranteed to be compatible with your system and to work right the first time. All of our server memory is built to strict JEDEC standards at one of the tier 1 facilities