Posted on Sunday, September 27 2020 @ 19:03 CEST by Thomas De Maesschalck
A bit more details about AMD's Big Navi GPUs was discovered in AMD firmware for Apple macOS 11 beta. VideoCardz
reports the upcoming high-end Navi 21 GPU has 80 CUs, the mid-range Navi 22 has 40 CUs and the low-end Navi 23 has 32 CUs. These chips will be released under the Radeon RX 6000 series. AMD will talk about its Big Navi lineup at a October 28 launch event.
This GPU would allegedly feature up to 80 Compute Units (5120 Stream Processors if each CU has 64 cores). The variant listed in macOS11 appears to have a boost clock at 2050 MHz with Navi 21A variant and up to 2200 MHz with Navi 21B variant.
With a boost clock of 2200 MHz, the Navi 21B would have a shader performance of 22.5 TFLOPs. For comparison, with NVIDIA’s new dual SM architecture, the GeForce RTX 3080 graphics card has a maximum FP32 throughput of 29.8 TFLOPs.
Interestingly, the firware also contains a reference to the Navi 31, which is a future GPU based on the RDNA3 architecture. It appears this model also has 80 CUs, the same as the Navi 21 GPU.
