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The core configuration of AMD Radeon VII has been reported incorrectly



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CES is always a hectic time for reviewers and companies – I would argue that this is one of the busiest weeks of the year, if you're a technical reporter For that reason, it's not second to none that wrong information gets into the channel despite the efforts of all concerned.

In this case, there is & # 39; A correction we need to make regarding AMD and its recently announced Radeon VII. Today, ExtremeTech has released a story claiming that this GPU would have a core configuration of 3840: 240: 128 (GPU cores: texture units: render outputs). This information was based on reports from other websites that participated in the show and that were confirmed to be correct. The data was reported in connection with AMD's disclosure of further details about the GPU during the show, not as rumor or unconfirmed coverage. For this reason, we have not set out the usual reservations when providing this information.

AMD spokesman, with whom we have spoken since then, the number of reported ROPs for the Radeon VII is wrong. The 128 number is general and credible, but is wrong. "Radeon VII consists of 64 ROPs," said the AMD spokesman. The actual configuration of the GPU is therefore 3840: 240: 64.

The good news is that this explains a few things. It was not at all clear why AMD should double ROPs, but leave the core GPU and texture unit resources unchanged. Typically, AMD and Nvidia maintain a rough parity between resources within a given GPU family, while reducing or increasing the number of GPU cores, texture units, and ROPs equally. Although there are occasional exceptions, but of the four basic resources: GPU cores, texture units, ROPs and memory bandwidth, AMD had two or more than doubled, while the number of GPU cores and the texturing capability of the GPUs remained apart from the improved Performance based on the watch identical.

  RadeonVII-vs-Vega64

Graph of Overclock3D

This indicates one of the following two causes. Either the Vega 64 was not well balanced remotely In terms of resources or Vega 7nm has been adapted to meet the requirements so me specific customers. Given that AMD is heavily invested in its semi-custom business and the 7 nm version of the core was first introduced in the enterprise and HPC segments, the latter seemed more likely than the first.

Now we know that Radeon VII does not matter 128 ROP card, the GPU's smaller performance improvements over Vega 64  SEEAMAZON_ET_135 See Amazon ET Commerce . Latency and increased memory bandwidth, combined with additional clocks and possible improvements in low-level efficiency performed by shifting from 14 nm to 7 nm, contribute to improved performance. It seemed strange that Radeon VII would not perform better with such a big improvement in fill rate. Now we know why. This also means that our speculations about the additional ROPs that make up part of the power consumption of the GPU are, for obvious reasons, wrong. However, increased memory bandwidth and the doubling of total RAM on-board will still play a role in overall power consumption.

We still do not know if AMD reruns on the show were misinformed or exactly how the false evidence spreads, but ExtremeTech regrets the mistake.

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