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AMD 7nm sharp dragon APU core exploration: collocation alone can finally be full of blood

via:驱动之家     time:2020/6/21 21:31:11     readed:329

Amd Renoir core can be said to be a great success. It uses 7Nm technology, Zen 2 CPU architecture and Vega GPU architecture to kill the four sides in the notebook field. The sharp dragon 4000U light and thin version and the sharp dragon 4000H game version are very popular, and will be landing in the desktop market soon, that is, the sharp dragon 4000g series.

Now fritzchens Fritz, VLSI engineer, has released the core photos of Renoir core, and twitter user @ nemez has annotated each functional module in detail.




On the left are two CCX modules in the CPU section, each with four CPU cores, four MB three caches, totaling eight cores, eight and three caches, doubled compared with the previous generation, but compared with the sharp dragon CPU, the three-level cache is only a quarter, so the overall scale of CCX is much smaller.

On the right are eight CU units in the GPU section, a total of 512 stream processors, eight ROP units and four texture unitsThere's no big change in architecture from the previous generation, and there's three less computing units and 192 less stream processors on scale, but the frequency increases by more than 40 percent, so the actual performance is better.

At the same time, you can see it next to the GPU coreThe display engine, display physical layer, and multimedia engine actually draw on the design of Navi architecture, some of which are even more advanced than Navi Therefore, the ability of audio and video is excellent.

Other parts128 bit DDR4 / lpddr4 / lpddr4x memory controller, I / O control center, five groups of PCIe 3.0x4 controllers, two groups of PCIe 3.0x2 controllers (also configured as SATA / 10GbE), that is, a total of 24 PCIe 3.0 channels.

On the previous two generations of desktop sharp dragon APU, if matched with a separate graphics card can only get half the bandwidth of the PCIe 3.0x8, and in the sharp dragon 4000 series of notebooks, the independent graphics card is also only PCIe 3.0x8, although enough to use, but still a residual state of blood.

Now,Ruilong 4000g has 24 PCIe 3.0, except for 4 for communication with chipset, there are 16 for independent graphics card and 4 for nvme m.2 SSD, not many but just good.

Renoir does not natively support PCIe 4.0, which is regrettable. However, on the APU platform, PCIe 4.0 does not have any effect, and it will significantly increase the cost and heat.


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