OWC 2x32GB (64GB) 2666MHz DDR4 PC4-21300 SODIMM 260-Pin, 1.2 Volts, Non-registered, Non-ECC, Fully compliant with JEDEC specifications, ROHS compliant, warranty safe upgrade, CYCLE TIME: 0.75 ns, TIMING: CAS = 18.0, Full Parameters: 18-18-18-14, BANDWIDTH: 21.3GB/s, Low noise 8-layer PCB, OWC Memory is the most cost effective and simple DIY upgrade you can install to unleash your Mac or PC's full potential, and speed up overall responsiveness.Become a multi-tasking maven when you upgrade your Mac or PC with OWC Memory. Open more apps. Open larger files. Plus, work with multiple files all at the same time. We test every OWC memory module at our in-house lab so you can upgrade with the confidence that your memory is built-to-last. We built your OWC Memory upgrade to meet or exceed the toughest industry specs to provide years of worry-free service. Note: For 27-inch iMac (2020) models — iMac20,1 and iMac 20,2 — OWC recommends that all DIMMs be the same capacity, speed, and manufacturer to ensure optimal memory performance.OWC2666DDR4S32G32GB OWC Memory Upgrade Module PC21300 DDR4 2666MHz SO-DIMM compatible with Dell, HP, Lenovo, ASUS Precision 5530 Precision 7530 Precision 7730 Precision 7540 Precision 7740 Precision 5540 XPS 15 Optiplex 7070 UFF Optiplex 3080 MFF Optiplex 3280 AIO Thinkpad P52 Thinkpad P72 Thinkpad P1 HP Z2 Mini G4 Workstation TUF Gaming FX504