Always select authentic Synology memory modules from local distributors for optimum compatibility & reliability Installation of non-Synology memory modules can lead to system instability or boot failures Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion Specifications Power Memory voltage 12 VDesign Compatible products RS2818RP RS2418RP RS2418 Memory Buffered memory type Unregistered (unbuffered) Memory layout (modules x size)1 x 4 GBInternal memory 4 GBComponent for P Cserver Memory form factor 288-pin DIMMMemory voltage 12 VECCNo Memory clock speed 2666 MHz Internal memory type DDR4