Collection: Dell R420XR Memory Upgrades

Dell PowerEdge R420XR Memory Configuration

The R420XR is a Dual Processor system with 6 DIMM slots per CPU. There are three memory channels per CPU. Each memory channel manages two DIMM slots. You cannot mix different memory types. Different speeds can be mixed but the modules will function at the slowest speed installed.

Cloud Ninjas' Dell R420XR Memory Upgrade Tips

• The total number of DIMMs for the Dell R420XR is 12 slots.
• The system supports 4GB, 8GB, 16GB, and 32GB RDIMMs.
• The R420xr supports up to 384GB of memory (12 DIMM slots) and speeds of up to 1600MT/s, providing high performance in a variety of applications.
• The R420xr also supports up to 384GB of UDIMM modules. 
• Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A6 are available. For dual-processor systems, sockets A1 to A6 and sockets B1 to B6 are available.
• When purchasing new memory it is best to purchase identical memory modules to what your system already has. Your current server configuration will determine the supported DIMM type and speed.
• Speed options for the PowerEdge R420XR are 1066MHz, 1333MHz, or 1600MHz depending on the type of memory configuration.
• Think Long Term! Purchase the maximum amount that your PowerEdge R420XR can hold and avoid wasting time and money on modules you won't be able to use if you upgrade again.
• The total number of memory modules that you should have in your PowerEdge R420XR should equal 2, 4, 6, 8, 10, and 12. To properly configure your system, install a minimum of two memory modules first.