iFixit Mac Mini Dual Drive Kit Classification_ram-ddr4-2400-udimm-8gb-1x-dr x4 configuration RAM kit is

x4 configuration RAM kit is for use in DDR4 compatible systems and operates at 2933 MT/s with an overall transfer rate of PC4-23400

M391B5273DH0-CH9 Capacity 4GB (1x 4GB) Brand Samsung Speed DDR3-1333 - 1333MT/s - PC3-10600 Voltage 1

2 MacMini5

See the NewerTech power calibration guide for details

If your original installed memory is 1

iFixit Mac Mini Dual Drive Kit Classification_ram-ddr4-2400-udimm-8gb-1x-dr x4 configuration RAM kit isiFixit Mac Mini Dual Drive Kit Key Specifications Form Factor: Dual Drive Kit Warranty: 1 Year Condition: New Server size your Mac Mini for less All Mac Minis support two hard drives don't pay the Apple premium for an expensive Mac Mini server when you can use this kit to make one yourself and save money. This kit includes all the tools and hardware you need to install a second drive. Just add a Mac Mini and up to a 2TB 2. 5 inch HDD or 2. 5 inch SSD