graphics-card-geforce-rtx-3080-for-notebooks:-souped-up-desktop-rtx-3070

Graphics card GeForce RTX 3080 for notebooks: souped-up desktop RTX-3070

After entries on Nvidia’s upcoming GeForce RTX 3070 for notebooks, a result for the mobile one can now be found in Geekbench’s online database Find GeForce RTX 3080. The benchmark has 48 read out shader multiprocessors from the graphics chip, i.e. 6144 Shader cores. Added to this are 16 GByte graphics memory.

The Geekbench run was made by a user with a ROG Zephyrus notebook, which on the CPU side was running on AMD’s not yet announced Ryzen 9 5900 H sets – presumably a Zen 3 combo processor with eight CPU cores and integrated Vega graphics unit (code name Cezanne). Found the entry of the Twitter user “TUM_APISAK”.

Behind the desktop RTX – 3080 With 6144 shader cores, the mobile GeForce RTX 3080 close to the desktop RTX – 3070, which uses 5888 shader cores. 6144 can be fully expanded with the ampere graphic chip GA 104 to which also GByte RAM on 256 data lines would fit. The desktop RTX – 3080 with GA 102 – GPU, 8704 shader cores, 320 – Bit interface and usually higher clock frequencies should be significantly faster.

Geekbench data for the mobile GeForce RTX 3070 already suggested that the graphics chips should be trimmed more than with desktop PCs. The notebook model therefore has 5120 shader cores. The reason for the limitation could be the power consumption, because the RTX – 3000 – graphics cards for desktop PCs are significantly more power hungry than their predecessors . In (tower) cases this can be compensated for by space for cooling and powerful power supplies, not with notebooks.

Back to the old days In recent years, Nvidia has relied on largely similar GPUs in desktop PCs and notebooks. The GeForce RTX 2080, for example, used in both cases 2944 Shader cores that GeForce GTX 1080 previously 2560. Only the GPU clock frequencies were reduced in favor of efficiency.

The 3000 generation, however, reminds us earlier years – the last was the gap between desktop and mobile in the year 2013 with the 700 series so big. At that time the GeForce GTX 700 came with 2304 Shader cores therefore, the GeForce GTX 780 M with 1536.

(mma)

block-diagram-for-amd's-ryzen-5000-“cezanne”-revealed

Block diagram for AMD's Ryzen 5000 “Cezanne” revealed

The appearance of a schematic block diagram of a Ryzen – 5000 processor based on the Cezanne design apparently allows some further conclusions to be drawn about the processors. Videocardz has compared the block diagram to the current Renoir design.

The Cezanne processors should use up to eight Zen 3 cores and eight compute units based on the Vega architecture. With regard to the cores and CUs, the full configuration is identical to the Renoir processors, which, however, use Zen 2 cores. Major changes can be seen in the block diagram, not all of which can be explained with the Zen 3 design and larger caches.

Comparison of the designs

L2 / L3 cache Die-Size (SoC / CCD) transistor density
Renoir 4 MB / 8 MB 156 mm² 62, 82 MTr / mm²
Matisse 4 MB / 32 MB 74 mm² 52, 70 MTr / mm²
Cezanne 4 MB / 16 MB ? ?
Vermeer 4 MB / 32 MB 80 , 7 mm² 51 , 43 MTr / mm²

The biggest difference between the desktop design (Matisse) and the mobile design (Renoir) The basis of the Zen 2 architecture was found in the halved L3 cache. Ultimately, a Renoir processor has 9.8 billion transistors. The size of the chip is 147 mm². All of the above processors will be manufactured at TSMC in 7 nm. AMD uses a process called “Deep Ultraviolet (DUV) Photolithography” – you can still get by without EUV exposure (Extreme Ultraviolet).

For Cezanne the L3 cache compared to Renoir is set to 16 MB doubled, but will still be half the size of the current desktop design (Vermeer). In the comparison between Matisse and Vermeer you can see that the CCD of 74 on 80, 7 mm² has grown, what with the changes in Zen -3 design related. Alone the 32 Occupy MB of L3 cache 27 mm² in space. Accordingly, it should be for 16 MB about 13, 5 mm².

Currently we do not yet know any data such as the number of transistors and the size of the Cezanne processors. According to initial estimates based on the block diagram, Cezanne should be around 175 mm² come, which is certainly partly due to the larger L3 cache.

The Zen 3 architecture and the associated changes in the cache hierarchy apparently have an impact on the overall design and size of the chip. However, there are likely to be other factors. AMD limited the Renoir processors to PCI-Express 3.0 and the mobile variants are also only eight instead of the otherwise freely available 20 Lanes available. This is justified with the lower power consumption, which is of course of particular importance in the mobile segment.

It is not known whether the Cezanne processors will support PCI-Express 4.0. It should be another 16 + 4 + 4 configuration for the lanes indicate whether AMD will reproduce them for the mobile variants limited to eight for connecting a dedicated GPU is also unknown. The desktop variants from Cezanne will certainly again offer more PCI Express lanes than the mobile variant.

On 11. January, AMD will give a keynote to the CES 2017 organize. The presentation of the Cezanne processors and the corresponding notebooks is expected there. These are then to be combined with the mobile Ampere GPUs from NVIDIA. When the corresponding notebooks will be available is still in the stars. However, there are indications that we will see a tense delivery situation with the mobile Ryzen processors, which, together with the also scarce ampere GPUs, will affect the entire notebook market. Partly the notebooks are therefore still with Ryzen – 4000 – and Core – 10000 – processors – so of the previous generation – to be equipped.