If AMD’s biggest change since the Zen processor was launched in 2017, it’s that AMD finally has a long-term, stable, reliable CPU roadmap, rather than the left-right, as before, unable to handle Intel’s Tick-Tock strategy, and now the two sides are in turn. I home CPU roadmap people do not understand, technology, architecture fans in general.
Anandtech’s website today released an interview with Mark Papermaster, AMD’s chief technology officer, asking a lot about plans for future Zen processors, but it’s impossible to publish official information, so the interview is a long one, but it’s mostly a set-piece. Expect official leaks to rest.
Here’s a simple compilation of AMD CTO’s future Zen processor roadmap and IPC section.
According to Mark Papermaster, AMD’s CPU upgrade cycle is now 12-18 months, that is, a year, a year and a half, almost every year you can see a generation of new products, steady.
For the CPU roadmap, AMD officially announced to Zen4, is still in the design, Zen3 has been designed, 2020 market should not run, and the current product is 7nm Zen2, this is AMD’s n, n1, n 2 roadmap.
Mark Papermaster says AMD has a team that goes beyond n-2, and it’s not really a secret that the Zen5 team has a CPU microarchitect, academician David Suggs, who is now the architect of Zen2.
AMD now has multiple teams working on different projects to help launch new products smoothly within 12-18 months, and if the design has to be terminated because of the progress of the launch, the technology that is not suitable for the current release will be incorporated into the next team (many of the designs on Zen2 were originally used for Zen).
Some say it’s learning Intel’s Tick-Tock strategy, which is part of AMD’s cross-design model, but Mark Papermaste denies that AMD’s path is to look at each generation of CPUs and upgrade the best available scenarios with the IPC, The memory caching system and the features AMD believes can be combined to improve at the fastest possible pace in every generation of CPUs.
One of the important things about Anandtech’s interview is the improved performance of the iPC of the next-generation Zen processor, which Mark Papermaste must have said is unapologetic, saying that the design of the CPU core should be balanced with performance and energy efficiency, anyway, there are many situations to consider.
But Mark Papermaste promised that they had previously pointed out that the industry level was to improve IPC performance by about 7% per year, AMD’s target would not be lower than that, and Anandtech calculated that if it was an 18-month upgrade, then the Zen2 to Zen3 IPC performance would also improve by 10.7%. Rounding is 11%.
This IPC increase is similar to the 10-15% IPC performance improvement mentioned by former Vice President Forrest Norrod.
Prior to the interview, it was reported that Zen3’s IPC performance improvement averaged up to 17%, of which the integer is only 10-12%, but the floating point improvement is relatively large, up to 50%, the integer floating point mixing operation is about 17% increase, while the frequency is also increased by 100-200MHz or more, The performance increase is still impressive.
Similarly, the future Zen4, Zen5 is not unexpected this mode, and Zen4 may start with a 5nm process, supporting PCIe 5.0 and DDR5, performance will be even more powerful.