Supostamente o Socket é o mesmo ou semelhante (SP6). Quanto ao Package, nos leaks há descrepancias que não batem certo com o Siena. Já apareceu, por exemplo, o 7995WX, com 96 Cores e 512 GB de RAM, quando o package do Siena só tem 4 Chiplets (Máximo 64 Cores Zen4c) e o Zen4c também não foi feito para atingir clocks altos. 512 GB de RAM também não parece bater certo com os 6 canais de memória que o Siena tem.Este Siena deve ser a base pro threadripper, será um package menor, certo?
Para o mercado Desktop é capaz de só aparecer o Phoenix1. O Phoenix2, além do mercado mobile, deve ser também para o mercado Embedded (Ele suporta ECC, por exemplo).Não sei se virá algum dia em socket AM5, tem poucas lanes PCIE, metade dos CPUs atuais. Precisa de ter pelo menos 20 lanes (8x pro slot da gráfica, 4x por chipset, 4x para NVME e 4x para NVME_2/USB4 externo.
Processor | Zen 4 / Zen 4c Cores | Zen 4 / Zen 4c Boost Clock (GHz) | L3 Cache (MB) | GPU Cores | GPU Clock (GHz) | cTDP (W) |
---|---|---|---|---|---|---|
Ryzen 7 7840U | 8 / N/A | 5.1 / N/A | 16 | 12 | 2.7 | 15 - 30 |
Ryzen Z1 | 2 / 4 | 4.9 / 3.5 | 16 | 4 | 2.8 | 9 - 30 |
Processor | Cinebench R23 |
---|---|
Ryzen 7 7840U | 12,003 |
Ryzen Z1 (30W) | 10,155 |
Ryzen Z1 (15W) | 7,822 |
Regarding performance, Zen 4 was up to 30% faster than Zen 4c in the single-threaded integer rate-1 test part of the SPECint benchmark suite. When locked at the same 3.2 GHz clock speed, the performance was identical between the Zen 4 and Zen 4c cores. The test confirms that they are architecturally the same, not like we didn't know before since AMD has revealed as much, but it's always interesting to see it in benchmarks.
Zen 4c needs a higher core voltage to reach the same clock speeds as Zen 4. The VID (voltage identification definition) charts revealed that Zen 4 hits the Vmin (the minimal voltage that a processor requires for a workload at a particular frequency) at 2.3 GHz. In contrast, Zen 4c arrives at the Vmin below 1.5 GHz. The V/F (voltage-to-frequency) curve for both cores overlaps at 1.5 GHz.
Zen 4c's power efficiency resides in between 1.5 GHz and 2 GHz. Zen 4c consumes less power despite the higher recorded voltage due to the more compact design.
As for iGPU performance, the Ryzen 7 7840U delivered up to 65% higher gaming performance than the Ryzen Z1. For context, the Ryzen 7 7840U's iGPU has 12 RDNA 3 compute units with a max 2.7 GHz clock, while the Ryzen Z1 only has four RDNA 3 compute units at 2.8 GHz.
XDNA AI EngineAlongside using up-to-date architectures for the all-important CPU and GPU, Phoenix integrates a variety of accelerators to improve power efficiency in specific applications. Intel had been integrating accelerators like their GNA AI accelerator for a while, and AMD is looking to catch up. An XDNA accelerator helps with machine learning inference, and an audio controller offloads signal processing from the CPU. Importantly for a mobile SoC, Phoenix also features a capable video engine
https://chipsandcheese.com/2023/09/16/hot-chips-2023-amds-phoenix-soc/Machine learning has taken off in the past few years, and AMD has put an AI engine (XDNA) on Phoenix to accelerate inferencing. XDNA is built from AIE-ML tiles using a Xilinx developed architecture. Phoenix’s XDNA implementation has 16 AIE-ML tiles, and can be spatially partitioned to let multiple applications share the AI engine.
The AMD EPYC 8004 Siena is different. It only has up to 64 cores. It uses Zen 4c like Bergamo instead of Genoa(-X) with Zen 4. It also uses a different socket, the AMD SP6 instead of SP5 socket. There are also versions for higher temperature ranges and lower power operation
The basic AMD EPYC 8004 recipe is up to four Zen 4c 16-core compute dies giving us up to 64 cores in the AMD EPYC 8534P. Zen 4c is the smaller and lower L3 cache Zen 4 variant that has the same ISA. This is the same core as in Bergamo.
The I/O die only offers 96 PCIe Gen5 lanes and six DDR5 channels, but on the pre-brief call, AMD said it is using the same I/O die as the EPYC 9004 series so it does not have to re-validate DDR5/PCIe Gen5 IP.
A quick side-by-side shows the AMD EPYC 9004 and EPYC 8004 series specs. One can see that the EPYC 8004 is designed for smaller and lower power systems than the EPYC 9004 series. Importantly, it is also single-socket only.