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Socket sTR5 supports DDR5 memory of the RDIMM type with ECC, as well as PCIe 5.0. It does not support non-registered DIMMs, non-ECC RAM, or DDR4. [ 3 ] The maximum number of memory channels is 8 and the maximum number of PCIe 5.0 lanes is 128 with a Threadripper PRO CPU and a WRX90 motherboard.
The 12th generation Alder Lake, 13th generation Raptor Lake, as well as 14th generation Raptor Lake Refresh CPUs support both DDR5 and DDR4 but, usually, there are only DIMM sockets for either one or the other on a motherboard. Some mainboards with Intel's H610 chipset support both DDR4 and DDR5, but not simultaneously. [23]
Supports DDR5 in dual-channel configuration. DDR4 is not supported, unlike Intel's LGA 1700 socket. [13] Support for PCIe 5.0 lanes from the CPU on X870E, X870, X670E and B650E chipsets. [14] Achieves 170 W TDP [i] and a Package Power Tracking (PPT) [ii] limit up to 230 W. [15]
Supports 12 channels of DDR5 ECC RAM with 6 TB maximum capacity per socket. [4] Using a dual socket system can allow up to 24 channels of DDR5 ECC RAM with maximum 12 TB RAM capacity. [5] Supports 128 lanes of PCI Express 5.0; Pin map of the SP5 socket from AMD
Additionally, Granite Rapids adds support for Multiplexer Combined Ranks (MCR) memory DIMMs. [19] MCR DIMMs were designed to provide higher capacities and increased memory bandwidth to high core count server processors compared to regular DDR5 RDIMMs rather than adding more DIMM slots to server motherboards due to physical space constraints. [20]
[5] [6] Zen 3 is supported on motherboards with 500 series chipsets; 400 series boards also saw support on select B450 / X470 motherboards with certain BIOSes. [7] Zen 3 is the last microarchitecture before AMD switched to DDR5 memory and new sockets, which are AM5 for the desktop "Ryzen" chips alongside SP5 and SP6 for the EPYC server platform ...