PHS-memory RAM suitable for ASRock X99 Extreme6/3.1

This 64GB memory is 100% compatible with ASRock X99 Extreme6/3.1.
Memory for Core i7 5th Generation CPU:You can achieve optimal performance by using 4 or 8 identical memories per CPUUDIMM memory can only be used if you are using a Core i7 processor. Memory for Xeon CPU:You can use ECC and RDIMM memory when using a XEON CPU.ECC memory and RDIMM (Registered) server memory cannot be used together.CPU in the systemUDIMMUDIMM ECCRDIMMWhich memory technology can be used, depending on the CPUCore i7-5960XCore i7-5930KCore i7-5820K4GB UDIMM8GB UDIMM Xeon E5-1600 v3Xeon E5-2600 v3 8GB UDIMM ECC8GB RDIMM16GB RDIMM32GB RDIMM.