AMD Allegedly Testing Hybrid Processor With Zen 4 and 4c Cores

upstart writes:

AMD Allegedly Testing Hybrid Processor with Zen 4 and 4c Cores:

An unannounced AMD processor identified as Family 25 Model 120 Stepping 0 recently showed up in the MilkyWay@Home database. The CPU can process 12 threads simultaneously and the CPU expert @InstLatX64 believes that this is AMD's codenamed Phoenix 2 processor, packing two high-performance Zen 4 cores and four energy-efficient Zen 4c cores.

AMD Eng Sample processor marked 100-000000931-21_N [Family 25 Model 120 Stepping 0] features 12 logical cores (i.e., six physical cores with simultaneous multithreading) and reports about 1MB of cache, which indicates that the MilkyWay@Home client cannot correctly determine the amount of cache featured by the chip. The listing itself does not prove that we are dealing with AMD's hybrid Phoenix 2 processor with Big.Little-like core configuration, but six physical/12 logical cores featured by an unknown CPU gives us a hint that this may match the rumors.

AMD's Phoenix 2 processor (which does not have a lot in common with the company's Phoenix APU) is rumored to feature two 'big' Zen 4 cores with 2MB L2 and 4MB L3 cache as well as four 'small' Zen 4c cores equipped with 4MB L2 and 4MB L3 cache, which is a rather surprising cache configuration. The APU is also said to pack an RDNA 3-based integrated GPU with 512 stream processors and has a DDR5/LPDDR5X-supporting memory subsystem, according to 3DCenter. @InstLatX64 claims that AMD's Phoenix 2 APU has an A70F8x CPUID, whereas CoelacanthDream asserts that the CPUID of the processor is 0x00a70f80.

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