Rumor | AMD Zen 4 Ryzen 7000 Phoenix-H to top out at eight cores at 40 W while Raphael-H will offer 16 cores at 45 W+ TDP, Strix Point to use Zen 5 and Zen 4D hybrid

Recently, we reported about the possibility of AMD bringing Zen 4 Raphael to mobile alongside Phoenix-H. Raphael-H is slated to be a 16-core beast with TDP above 45 W, but that's all we've known so far. Now, @greymon55 on Twitter has more information on what to expect from Phoenix-H and Raphael-H in late 2022.

For those not in the know, the upcoming successor to AMD Cezanne is Ryzen 6000 Rembrandt. Rembrandt will offer up to eight Zen 3+ cores and RDNA 2 graphics in the 45 W TDP envelope. Succeeding Rembrandt will be Phoenix-H and Raphael-H in late 2022. 

Ryzen 7000 Phoenix-H will be a 5 nm Zen 4 part featuring up to eight cores and 16 threads and is expected to feature TDP ranges up to 40 W. On the other hand, Raphael-H will also be a 5 nm Zen 4 die but with up to 16 cores and 32 threads at a TDP greater than 45 W.

While Phoenix-H and Raphael-H cater to laptops, Granite Ridge and Strix Point are future CPUs succeeding Raphael, presumably from the Ryzen 8000 family, for the desktop based on Zen 5. Granite Ridge will see AMD using 3 nm Zen 5 cores on mainstream desktop. @greymon55 notes that it offers "3 nm + 6 nm Zen 5". The exact details are still scarce, but we think that it likely means 3 nm Zen 5 dies and 6 nm RDNA 2 iGPU and/or the I/O die.

Strix Point is the mainstream desktop APU, which will feature 3 nm Zen 5 and 5 nm Zen 4D cores in a hybrid fashion a la Intel Alder Lake. Zen 4D or Zen 4 "Dense" is thought of as AMD's version of "LITTLE cores" with the focus being on efficiency.

AMD recently showed off its plans to introduce a cloud-focused version of Zen 4 named Zen 4c with EPYC Bergamo, which will pack as many as 128 Zen 4c cores. With Zen 4c, higher frequencies are traded for denser cache and logic. How much of that exactly translates to Zen 4D for mainstream needs to be seen. From what we've been hearing so far, Zen 4D on desktop could stick to Zen 3 IPC levels but offer much improved multi-core performance. 

The rumored combination of up to eight 3 nm Zen 5 performance cores, up to 16 5 nm Zen 4D cores, and integrated RDNA graphics is definitely a promising proposition, at least on paper. If the speculated 20-40% IPC increase over Zen 4 is true, Zen 5-based CPUs should be able to offer Intel Raptor Lake a mighty challenge.

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