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DDR5 and LPDDR5 are supported by the Ryzen 6000 series mobile APUs, powered by their Zen 3+ architecture. Ryzen 7000 and Ryzen 9000 series desktop processors also support DDR5 memory as standard. [24] Epyc fourth-generation Genoa and Bergamo server CPUs have support for 12-channel DDR5 on the SP5 socket. [25] [26]
Common features of Ryzen 7000 HEDT/workstation CPUs: Socket: sTR5. Threadripper CPUs support DDR5-5200 in quad-channel mode while Threadripper PRO CPUs support DDR5-5200 in octa-channel mode with ECC support. L1 cache: 64 KB (32 KB data + 32 KB instruction) per core. L2 cache: 1 MB per core.
The time to read the first bit of memory from a DRAM without an active row is T RCD + CL. Row Precharge Time T RP: The minimum number of clock cycles required between issuing the precharge command and opening the next row. The time to read the first bit of memory from a DRAM with the wrong row open is T RP + T RCD + CL. Row Active Time T RAS
In 2020, AMD faced some criticism when it was announced on May 7 that its Zen 3-based Ryzen 5000 microprocessors would only be compatible with newer 500-series chipset AM4 motherboards. [41] [42] [43] This was explained as motherboard BIOS's sizes not being large enough to support the full range of AM4 socket processors.
Common features of Ryzen 7000 desktop CPUs: Socket: AM5. All the CPUs support DDR5-5200 in dual-channel mode. L1 cache: 64 KB (32 KB data + 32 KB instruction) per core. L2 cache: 1 MB per core. All the CPUs support 28 PCIe 5.0 lanes. 4 of the lanes are reserved as link to the chipset.
On August 29, 2022, AMD announced four Zen 4-based Ryzen 7000 series desktop processors. The four Ryzen 7000 processors that were launched on September 27, 2022 consist of the Ryzen 5 7600X, Ryzen 7 7700X, and two Ryzen 9 CPUs: the 7900X and 7950X. The processors feature between 6 and 16 cores. [15]
Common features of Ryzen 7000 HEDT/workstation CPUs: Socket: sTR5. Threadripper CPUs support DDR5-5200 in quad-channel mode while Threadripper PRO CPUs support DDR5-5200 in octa-channel mode with ECC support. L1 cache: 64 KB (32 KB data + 32 KB instruction) per core. L2 cache: 1 MB per core.
The Zen 5-based Ryzen 7 9800X3D has a 500 MHz increased base frequency over the Zen 4-based Ryzen 7 7800X3D and allows overclocking for the first time. [ 28 ] Ryzen AI 300 APUs, codenamed "Strix Point", features 24 MB of total L3 cache which is split into two separate cache arrays. 16 MB of dedicated L3 cache is shared the 4 Zen 5 cores and 8 ...