OWC 8GB UPGRADE: Consists of a single 8GB DDR5 4800 PC5-38400 CL40 1Rx16 288-pin 1.1V Non-ECC Unbuffered DIMM Memory RAM Module Upgrade compatible with Precision Workstation models 3660 Tower And 3660XE Tower. 100% COMPLIANT: JEDEC-Standard and ROHS Compliant. Warranty-Safe Upgrade. Designed and Tested to Meet or Exceed all Manufacturer OEM Specs. EASY INSTALLATION: In Most Cases, Installing Memory is an Easy DIY project. Watch our OWC Basic Installation Video for Help. INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing. Replacement for Dell part numbers AB883073 SNP29NJ4C/8G.