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Amd CTO talks about zen4 / zen5: upgrade the performance of the first generation of IPC in 12-18 months by at least 7%

via:驱动之家     time:2019/12/31 1:08:21     readed:64

If the biggest change since amd launched Zen processor in 2017, it is that AMD finally has a long-term stable and reliable CPU roadmap, rather than the old one, unable to cope with Intel's tick tock strategy. Now the situation of both sides is the opposite. I's CPU roadmap is incomprehensible, and the process and architecture are not so common.

AnandTech's website today released an interview with mark papermaster, chief technology officer of AMD, asking about a large number of plans for the future Zen processor, but these things are impossible to publish official information, so although the interview is long, it is mainly a routine, hoping that the official leak can rest.

Here is a simple compilation of AMD CTO's future Zen processor roadmap and IPC.

According to mark papermaster,AMD's CPU upgrade cycle is now 12-18 months, that is to say, a year and a half ahead of schedule, and a new generation of products can be seen almost every year.

for the cpu roadmap, amd official release is to zen4, is still in the design, zen3 has been designed, the 2020 listing should not run, and the current product is 7nm zen2, which is the n, n1, n2 roadmap of amd.

Mark Papermaster says AMD has a team that goes beyond N2, and it's actually no secret.The zen5 team has been led by David Suggs, CPU micro architect and academician, he is also the architect of zen2.

Amd now has multiple teams working on different projects, which will help the smooth launch of new products within 12-18 months. If the design has to be terminated due to the launch progress, the technologies that are not suitable for the current release will also be incorporated into the next team (many designs on zen2 are originally used for Zen).

For AMD, which is a pattern of at least two teams cross designing, some people say it's learning Intel's tick tock strategy. However, mark papermaster denies that he emphasizes that AMD's way is to review each generation of CPU, combine the existing best scheme with IPC improvement, memory cache system and functions that AMD thinks can be done, and strive to make the fastest pace possible in each generation of CPU Improvement.

An important point in AnandTech's interview is the improvement of the IPC performance of the new generation of Zen processor. Mark papermast certainly has no comment on this. He said that both performance and energy efficiency should be taken into account when designing the CPU core. In any case, there are many situations to be considered.

However, mark papermast promised that they had pointed out that the industry level is to improve the performance of IPC by about 7% every year, and AMD's goal will not be lower than this number. AnandTech calculated that if the generation is upgraded in 18 months, then the performance of the IPC from zen2 to zen3 will also be improved by 10.7%, to the nearest 11%.

This IPC growth rate is almost consistent with the 10-15% IPC performance improvement mentioned by former vice president Forrest norrod.

Before the interview,It's said that zen3's IPC performance is improved by an average of as much asSeventeen%Among them, the integer is only 10-12%, but the floating-point improvement is relatively large, up to 50%. The integer floating-point hybrid operation is almost 17% improvement, and the frequency is also increased by 100-200mhz or more. The performance increase is still considerable.

In the same way, zen4 and zen5 in the future are the same mode, and it is possible that zen4 will start to use the 5nm process to support PCIe 5.0 and ddr5, with more powerful performance.

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