![]() And AMD clearly expects CXL will be a hit in the datacenter as it's already extended its memory encryption tech used in confidential computing - called SEV-SNP - for these memory expansion modules out of the box.Įven though AMD supports CXL, that doesn't mean the ecosystem is necessarily ready to take advantage the new tech. Genoa supports a modified version of CXL 1.1 that backports support for tier-memory configurations. This is where AMD is focusing its attention for its first foray into CXL. While future iterations of CXL will enable full composable infrastructure, early implementations of the tech are focused squarely on memory expansion. Speaking of CXL, Genoa is the first x86 platform with support for the cache-coherent interface. AMD's Epyc 4 will likely beat Intel Sapphire Rapids to market.After spate of delays, Intel promises Sapphire Rapids Xeons for early 2023.AMD refreshes desktop CPUs with 5nm Ryzen 7000s that can reach 5.7GHz with 16 cores.Intel takes on AMD and Nvidia with mad 'Max' chips for HPC.Of the PCIe lanes 32 can be dedicated for SATA connectivity, while dual socket systems gain an additional 12 "bonus" lanes of PCIe 3.0 connectivity. Genoa also increases the number of interfaces to 160 lanes of PCIe 5.0 and adds 64 lanes dedicated to CXL. Of course, even at one DIMM per channel populating all those channel could prove tricky, especially in traditional dual socket systems. According to AMD, this works out to a maximum theoretical memory bandwidth of 460GB/sec when all 12 channels are populated with 4,800MT/sec DDR5 memory. ![]() Genoa's I/O die - which is now based on a TSMC 6nm process as opposed GlobalFoundry's 14nm tech - supports 12 channels of DDR5 4,800 MT/sec up to 6TB per socket. The CPUs are AMD's first datacenter chips with support for DDR5 memory. Looking beyond raw performance Epyc 4 also delivers a number of memory and I/O improvements over Milan. While AMD will tell you Epyc 4 squeezes more work out of each watt, that doesn't change the fact that the higher power envelope poses a challenge for server builders tasked with finding a way to dissipate all of that heat, and the datacenter operators that have to power those systems. ![]() What is new is the move from TSMC's 7nm to its more advanced 5nm process and the use AMD's Zen 4 cores, which doubles the L2 cache to 1MB per core. The actual core layout of these chiplets, however, remains largely unchanged from Milan, with eight cores sharing 32MB of 元 cache between them. The larger package makes room for four additional Core Complex Dies (CCDs), bringing the total to 12. Taking a peek under Genoa's now even larger heat spreader - yep, there's a new socket too - reveals just how AMD has managed to cram so many cores into a single package. As usual we recommend taking these claims with a healthy grain of salt. Combined with higher core counts and clock speeds, Ram Peddibhotla, AMD VP of Epyc product management, claims its flagship 96 core Epyc 4 CPUs are twice as fast as last year's 64-core Milan parts in a variety of cloud, high-performance compute (HPC), and enterprise benchmarks. The multi-die architecture has enabled significant improvements for each processor generation since the beginning.However, the IPC gains are only part of the story. ![]() The ‘Zen 4’ core integrated into 4th Gen AMD EPYC processors is the first and only x86 server CPU built with 5nm fabrication technology. “Zen 4” enables leadership memory bandwidth and capacity with 12 DDR5 channels, as well as next-gen I/O with PCIe® 5.0 and memory expansion with CXL™. Start configuring your own 4th Gen AMD EPYC Server!ĪMD EPYC™ 9004 Series processors include up to 96 “Zen 4” microarchitecture-based cores, built on 5nm process technology. Introducing 4th Generation 9004 series AMD EPYC™ Processors, Code-Named “Genoa”Ĥth Gen EPYC™ processors are designed to deliver accelerated business results while lowering costs, power, and server footprint. Introducing 4th Generation 9004 series AMD EPYC™ Processors, Code-Named “Genoa”4th Gen EPYC™ processors are designed to deliver accelerated business results while lowering costs, power, and server footprint.
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