Memory Types. There are 8 memory channels that each consist of 3 DIMM slots. The PowerEdge R offers a two-slot option (available with the 4-, 6-, or 8-drive bay chassis only) and a three-slot option (this is the only option on the channel 3: slots B4, B8, and B The following table shows the memory populations and operating frequencies for the supported configurations. . There are 8 memory channels. Each memory channel. Would my best bet be populating the remaining 8 slots with 8gb DIMMS? Or could I get away with adding 4x 16gb. Drive Bays: Up to eight ” hot-plug SAS, SATA or SSD · I/O Slots: 3 PCIe slots: · Hard Drives: Hot-plug hard drive options: · Power Supply: · Availability. With 24 DIMM slots available, the R can be configured with up to GB of total memory: 8GB / 16GB / 32GB / 64GB DDR4. The Dell PowerEdge R Server has a total of 24 DDR3 DIMM slots. SaveMyServer uses different brands. DIMM Type, DIMMs. There are a total of 24 DIMM slots on the Dell R server. I'm looking to add another 64gb. Buy online $ DELL R 8 BAY PCIE 2 SLOT - Used - DELL POWEREDGE R RACK INCH SFF 8 BAY HPHD HPPS 1U SERVER CHASSIS - (2) TWO FCLGA Details for DELL R 4 BAY PCIE 3 SLOT - Refurbished - DELL POWEREDGE R RACK INCH SFF 4 BAY HPHD HPPS 1U SERVER CHASSIS - (2) TWO FCLGA Dell Poweredge R Server Specifications · 24 DIMM Slots · Up to GB · 2GB, 4GB, 8GB, 16GB, 32GB DDR3. DIMM Slots. Cloud Ninjas' Dell R Memory Upgrade Tips.