Zen 2 and Zen 3: AMD in the fast APUs with two architectures
Source: Hardware Luxx added 19th Oct 2020AMD has already indicated a two-part strategy for processors with integrated graphics units several times. It is known that Cezanne CPU cores based on Zen 3 and an integrated graphics unit based on the 7 nm-optimized Vega architecture. It is also known that Van Gogh is to appear with Zen 2 cores and Navi2 GPU at the same time. In parallel to Cezanne, AMD is apparently also planning a Lucienne design. Here, AMD apparently plans to use Zen-2 cores with Vega GPUs – so Lucienne is in a certain sense somewhere between Cezanne and Van Gogh.
Twitterer ExecutableFix has the first models of the next APU this weekend Generation and the associated technical data published. This shows that AMD in Ryzen – 4800 U-series will already run on two tracks. There will be models with Zen 2 and Zen 3 cores that are supposed to run parallel to each other. Of course, this harbors the problem that the buyer of a notebook with such a processor has to look very carefully – after all, the Zen 3 architecture should on average be % faster.
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So far, the information is only an unconfirmed rumor. Due to the level of detail of the information and the source as such, doubts about the correctness are very small.
The upcoming product range for mobile Ryzen processors would then look like this:
| Model | µArch | Cores / Threads | Base / boost clock | GPU | TDP |
| Ryzen 7 5800 U | Zen 3 Cezanne | 8th/16 | 2.0 / 4.4 GHz | Vega8 2. 000 MHz |
10 – 25 W 15 W |
| Ryzen 7 5700 U | Zen 2 | 8th/16 | 1.8 / 4.3 GHz | Vega8 1.900 MHz |
10 – 25 W 15 W |
| Ryzen 5 5600 U | Zen 3 Cezanne |
6 / 12 | 2.3 / 4.2 GHz | Vega7 1.800 MHz |
10 – 25 W 15 W |
| Ryzen 5 5500 U | Zen 2 Lucienne |
6 / 12 | 2.1 / 4.0 GHz | Vega7 1.800 MHz |
10 – 25 W 15 W |
| Ryzen 3 5400 U | Zen 3 Cezanne |
4/8 | 2.6 / 4.0 GHz | Vega6 1 . 600 MHz |
10 – 25 W 15 W |
| Ryzen 3 5300 U | Zen 2 Lucienne |
4/8 | 2.6 / 3, 85 GHz | Vega6 1.500 MHz |
10 – 25 W 15 W |
For comparison, take another look at the current product range:
| Model | µArch | Cores / Threads | Base / boost clock | GPU | TDP |
| Ryzen 7 4800 U | Zen 2 Renoir |
8th/16 | Vega8 1.750 MHz |
10 – 25 W 15 W |
|
| Ryzen 7 4700 U | Zen 2 Renoir |
8/8 | 2.0 / 4.1 GHz | Vega7 1.600 MHz |
10 – 25 W 15 W |
| Ryzen 5 4600 U | Zen 2 Renoir |
6 / 12 | 2.1 / 4.0 GHz | Vega6 1.500 MHz |
10 – 25 W 15 W |
| Ryzen 5 4060 U | Zen 2 Renoir |
6/6 | 2.3 / 4.0 GHz | Vega6 1.500 MHz |
10 – 25 W 15 W |
| Ryzen 3 54300 U | Zen 2 Renoir |
4/4 | 2.7 / 3.7 GHz | Vega5 1.400 MHz |
10 – 25 W 15 W |
Compared to Ryzen – 4000 U-series offers the Ryzen – 5000 U series apparently no differentiation in models with and without SMT. The new models based on the Zen 3 architecture are also clocked slightly higher across the board or achieve a higher boost clock. The Cezanne and Zen 3 models are likely to be significantly faster, since they also have the architectural improvements to offer in addition to the small clock speed.
The integrated graphics unit has been upgraded. The Ryzen 3 processors now offer at least one Vega GPU with six compute units and thus 384 shader units. In addition, the clock rate is a bit higher across the board – as with the CPU cores.
The higher clock rate of the new Cezanne and Lucienne processors should be due to improved manufacturing. We see this also with the Ryzen – 5000 – processors for the desktop. In an interview with Anandtech, Mark Papermaster, CTO at AMD, confirms that the new processors will continue to be manufactured in 7N (7 nm process from TSMC). Even the Process Design Kit (PDK) is identical, but there will be changes in the actual manufacturing process so that the yield and performance increase a little. It is precisely on this that Lucienne’s slight increase in clock rate compared to Renoir should be related.
This year is no longer with the Ryzen – 5000 U processors to be expected. Instead, AMD should see them in the first quarter 2021 so that we will see the first notebooks in the second quarter – 12 Months after the Renoir models.