Review on 🔒 Kingston ValueRAM 16GB DDR3 ECC Reg Server Memory - 1600MHz, CL11, DIMM DR x4 - KVR16R11D4/16 by Sean Zamora

I'm sure the RAM is ok but it doesn't work on my HP z420 Workstation with Xeon E5-1620 3.60GHz (Sandy Bridge). If you want to use 16GB DIMMs on this motherboard, you must use Registered DIMMs (RDIMMs) and not Unbuffered DIMMs (UDIMMs). For modules of 8GB or less, the motherboard uses UDIMMs. To be honest the motherboard manual says you can only use DIMMs up to 8GB (for a system up to 64GB). However, I upgraded my z420 to 128GB using eight 16GB ECCs and registered Samsung M393B2G70DB0-YK0 DIMMs.