AMD broke the news last September after the network broke the news that AMD’s Zen3 architecture would support SMT’s single-core four-threaded technology. AMD did, however, consider four-threadtechnology, not Zen3, but Zen4 architecture Genoa. SMT multithreaded technology enhances the CPU’s multi-tasking capabilities, currently mainly using SMT2 single-core dual-threading, performance growth of about 20%-30%. If it’s an SMT4 single-core quad thread, isn’t the performance higher?
Single-core four-threaded technology is not new, IBM has been used on its own Power processor for many years, a core can support four threads, its 24-core Power 9 can achieve 96 thread super strength.
But AMD and Intel, two X86 companies, did not apply four-threaded technology, presumably taking into account efficiency.
It’s no longer that AMD hasn’t thought about it, it’s just that the rumored target has changed from Zen3 last year to the current Zen4 architecture. The latest revelations, which found an undisclosed AMD CPU roadmap, mention the next generation of Genoa Genoa processors considering SM4 single-core four-threaded technology.
At the same time, Genoa also supports DDR5, PCIe 5, and the new SP5 slot, S-Link bus, and more.
But the Genoa processor in this roadmap is still the Zen3 core, the process is also 7nm plus, not the current 5nm Zen4, so it seems that the roadmap is actually early, does not match the current design.
Given that AMD hasn’t fully revealed the Zen4 architecture yet, the Genoa processor won’t be available until 2022, and there’s hope for four-threaded technology.