OWC 128.0GB UPGRADE: Consists of Two 64GB DDR4 2933MHz PC4-23400 CL21 ECC Registered DIMMs 1.2V 288-pin Memory Module with Mac qualified Thermal Sensor EEPROM 100% COMPLIANT: With JEDEC Standard Specifications, ROHS Compliant, Warranty Safe Upgrade. Designed and Tested to Meet or Exceed All MAC Specifications for Mac Pro 2019 7,1 Tower and Rack COMPATIBLE PART NUMBERS: KSM32RS4/32HCR, KSM26RD4/32HDI, KSM26RD4/64MFR, KSM32RD4/64MFR, KSM32RD8/16HDR, KSM32RD8/16MRR COMPATIBLE WITH: 2019 Mac Pro 8-Core (Model ID: MacPro7,1) 2019 Mac Pro 12-Core (Model ID: MacPro7,1) Mac Pro 16-Core (Model ID: MacPro7,1) 2019 Mac Pro 24-Core (Model ID: MacPro7,1) 2019 and a2304 Mac Pro 28-Core (Model ID: MacPro7,1) A1991 INCREASED PERFORMANCE: Memory Upgrades are the Most Effective and Easy Way to Boost the Performance in Your Mac Pro INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing OWC 128GB (2 x 64GB) PC23400 DDR4 ECC-R 2933MHz RDIMMs Memory Compatible With Mac Pro 2019 and up models Product Specs: Size: 288PIN, SDRAM DIMM, 1024M x 72, Dual Rank ECC Registered Memory Module, Data Rate = 2933MHz, Module Bandwidth 14.9GB/s, CL21, Voltage 1.2V, Specified Thermal Sensor, RoHS Certified, Warranty Safe Upgrade. OWC Memory Compatible With Mac Pro 2019 fully meets specifications with special attention to proper thermal specifications. I