Published: Thu, November 08, 2018
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AMD EPYC 'Rome' to feature up to 64 Zen 2 cores

AMD EPYC 'Rome' to feature up to 64 Zen 2 cores

AMD's Next Horizon event this week detailed elements of its 7nm production schedule for both graphics cards and CPUs. Compared to Zen, AMD said to expect twice the performance and four times the floating point performance per socket.

California-based chip giant AMD has unveiled the 7nm Zen 2 microarchitecture for its future family of processors.

One of AMD's mainstay features is socket compatibility for those that have already adopted previous generation processors.

AMD also talked about Zen 2 CPU core and modular design methodology with the so-called chiplet design but we will cover that one in a separate article. AMD also used the event to announce a major win in the cloud computing market, with Amazon's Web Services division launching instances based on current-generation Epyc processors which are claimed to beat their Intel-based equivalents on performance-per-dollar. With a focus on Epyc chips for servers, AMD now hopes to surpass the performance of its competitor Intel rather than just match it. According to Papermaster, this was something of a gamble, given the challenges of implementing such a complex design on a leading-edge semiconductor manufacturing technology. But because of continued delays in Intel's 10nm effort, AMD lucked out; it will be shipping some of the fastest and most power-efficient silicon in the datacenter next year.

Linked with AMD's Infinity Fabric, these chiplets effectively create a server chip that can be equipped with up to 64 Zen 2 cores and 128 threads.

In the slide revealing this design, we also see that while the chiplets will be made on a 7 nm process, the I/O die will actually be on a 14 nm process.

Yet they do pave the way for the next wave of Ryzen processors.

Rome is currently sampling with customers now in preparation for the processors to debut in 2019.

AMD has made good on its promise to reveal more information about its upcoming products, announcing that it will release its first graphics products based on a 7nm process node by the end of the year - but for data centre customers, not gamers, before you get too excited - while also unveiling the Zen 2 microarchitecture that will power its processors in 2019.

Zen 2 has a number of improvements overall, among which a better branch predictor and enhanced instruction pre-fetching, larger micro Op Cache, double the floating point width (256-Bit), as well as double the load / store bandwidth.

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