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.

Cloud Ninjas' Dell PowerEdge R420XR0 Questions & Answers

1. What sizes can you use for the Dell PowerEdge R420XR Server?
   The Dell PowerEdge R420XR Server can be upgraded using 1 GB, 2 GB, 4 GB, 8 GB, and 16 GB RDIMM or 1 GB, 2 GB, and 4 GB UDIMM.
   For a 384 GB upgrade, get your kit at https://cloudninjas.com/.
   
   
2. What speeds are supported by the Dell PowerEdge R420XR Server?
   The Dell PowerEdge R420XR Server can support 1333MT/s, 1066MT/s, 1600MT/s and 800MT/s based on DIMM and configuration.
   
   
3. What types of RAM are accepted by the Dell PowerEdge R420XR Server?
   The Dell PowerEdge R420XR Server supports DDR3 RDIMM and UDIMM with ECC.
   
   
4. What is ECC Registered Memory?
   The Dell PowerEdge R420XR Server supports registered memory with ECC. ECC memory detects and corrects memory errors within the server environment. Registered (also called buffered) memory modules register between DRAM modules and the system's memory controller. ECC Registered Memory transfers less electrical load to your memory controller which makes it more stable and reliable.
   
   
5. What is Unbuffered Memory?
   The Dell PowerEdge R420XR Server supports unbuffered memory with ECC. Unbuffered memory is memory that has no register between your DRAM and your system’s memory controller.
   
   
6. What is Load Reduced Memory?
   The Dell PowerEdge R420XR Server does not support load reduced DIMM (LRDIMM). Load reduced DIMM is designed with a buffer chip (or chips) to replace the register to help minimize loading, the LRDIMM increases server system memory capacity and speed. LRDIMM differs from low capacity, low voltage registered memory modules (LV RDIMM).
   
   
7. Can I mix ECC Reg with ECC unbuffered or Non-ECC memory?
   The Dell PowerEdge R420XR Server does not support the use of both unregistered and registered memory with ECC or the use of non-ECC memory. It is recommended to use identical memory configuration in all channels.
   
   
8. What is max configuration?
   The Dell PowerEdge R420XR Server allows the maximum configuration of 194 GB with the use of 12 RDIMM at size of 16 GB, at the 1600 MTs. For a 384 GB upgrade, get your 32 GB kit at https://cloudninjas.com/.
   
   
9. How many memory channels per CPU?
   The Dell PowerEdge R420XR Server has 3 channels with 3 slots per channel, per processor which can support up to 2 DIMM per channel, 6 DIMM per processor and 12 DIMM in a 2-processor configuration.
   
   
10. How do I identify the start of the memory channel?
    The Dell PowerEdge C2100 Server has 18 DIMM sockets on the motherboard which support two processors (processor 0 and processor 1). When installing memory modules start the channel marked DIMM0_CHA.
    
    
11. Where can I order memory for my server?
    Order your memory at https://cloudninjas.com/ by finding and selecting the memory package that is right for you.
    
    
12. How soon will my RAM arrive?
    Orders placed before 8 am are set for same day processing and shipping. Delivery times vary based on carrier and location.
    
    
13. What is the warranty on memory for the server?
    Cloud Ninjas offers a one-year warranty on fully tested, refurbished memory.