AMD Confirms Hybrid Ryzen 5 7440U Phoenix APU With Zen 4 & Zen 4C Cores

wccftech.com:

AMD seems to have confirmed that its Ryzen 7040 "Phoenix" APUs come in hybrid flavors featuring Zen 4 and Zen 4C cores.

Talking to XDA-Developers, AMD confirmed the existence of a second Phoenix SKU powering its Ryzen 7040 APU lineup. While original Phoenix chips are based entirely on the Zen 4 and RDNA 3 graphics architecture, the second Phoenix SKU, also known as Phoenix 2, makes use of a hybrid Zen 4 + Zen 4C combination for the CPU cores.

As per the confirmed information, the AMD Phoenix 2 Hybrid APUs will feature a dual-core Zen 4 and quad-core Zen 4C implementation on the same CPU die and the RDNA 3 graphics cores for its iGPU. The first APU to make use of such a configuration has also been confirmed to be the Ryzen 5 7440U which will feature 6 cores and 12 threads. The chip will also be available in the standard Zen 4-only variation which would allow AMD to dual-source the production based on demand for these chips.

In my correspondence with AMD, several key details about this small APU (presumably Phoenix 2) were confirmed, and it's not just a simple hybrid version of the larger 8-core Phoenix design used in the higher-end models.

The original rumor suggested that Phoenix 2 would feature in the Ryzen 3 7440U and Ryzen 5 7540U, and since the 7540U is advertised as not having Ryzen AI and 4 GPU cores, this is plausible. However, I asked AMD to confirm whether the Ryzen 5 7540U used this new APU, and I was told it's "just the 7440U for now".

via XDA-Developers

Now technically, having Zen 4 and Zen 4C cores shouldn't make for a huge difference because, unlike Intel's P-Core and E-Core implementation, the Zen 4 variants feature the same ISA & the differences mainly lay within the L3 cache per core which is reduced to 2 MB