Home > Servers > Rack and Tower Servers > AMD > White Papers > Workload-Based DDR5 Memory Guidance for Next-Generation PowerEdge Servers > Overview
The 4th Gen AMD EPYC processors are the first AMD x86 server processors to support DDR5 memory. The CPUs themselves still have a chiplet design with a central I/O chiplet surrounded by compute chiplets. The memory runs at speeds of up to 4,800 MT/s, which is 50 percent faster than the 3,200 MT/s that the previous 3rd Gen AMD EPYC processors supported.
One other significant difference is in the number of available memory slots. Each socket supports up to 12 DDR5 DIMM channels at speeds of up to 4,800 MT/s. The 3rd Gen AMD EPYC processor supports up to 16 DDR4 DIMMs per socket in a two-DIMMs-per-channel configuration (2DPC) or 8 DDR4 DIMMs per socket in a one-DIMM-per-channel (1DPC) configuration. The 2DPC configuration supports a maximum speed of 2,933 MT/s.