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AMD’s Big Navi GPU codenamed ‘Sienna Cichlid’ will reportedly include 5,120 stream processors

Komachi_ensaka recently posted a CU count of AMD’s upcoming Navi 21 GPU and this is the same count posted by Chiphell speakers and other different twitterers, so it is definitely starting to look credible. At 80 CUs, you look at the 5120 stream processor and you could be the big Navi that gamers have been waiting for almost 3 years now.

Navi 21 GPU from AMD has 80 CUs according to yet another leak

Twitter user _rogame also created a compilation of the leaked specifications and this is a great table for reference purposes:

AMD Zen 3 ‘Ryzen 4000’ desktop CPUs and RDNA 2 ‘Radeon RX Navi 2X’ GPUs on track for launch in 2020 – EPYC Milan ships later this year, 5nm Zen 4 in 2022

80 CUs translate to 5120 stream processors (assuming the same ratio as GCN) and if AMD can run them at a minimum of 1700 MHz, you’re looking at astonishing 17.5 TFLOPs of power. Since this is 7nm, AMD could easily manage that (unless they run into TBP limitations), although you’re still looking at a fairly steep power consumption of around 300W (not that every gamer in the high-end segment cares about power consumption) ).

It is quite possible that this is the Big Navi promised to us almost 2.5 years ago that will provide AMD fans with the high-end map they have been waiting for. On the other hand, it’s also possible that this is a new dice the company has prepared, and while these graphics cards will clearly be more powerful than the RX 5800 series, it’s still not a Big Navi.

Since we’re looking at at least four confirmed AMD launches related to graphics cards (thanks to EEG fills), it’s very likely that the Open VR participant we’ve seen recently is one of them. Nomenclature would dictate that the RX 5950 XT (or 6950 XT or whatever AMD calls it) is considerably more powerful than all of its younger siblings (like the already released RX 5700) and by following the steps we can easily see that is going to be a pretty powerful card.

AMD Radeon RX ‘Big Navi’ enthusiast RDNA 2 graphics card reportedly with 16 GB VRAM – final design not yet completed, expected launch in Q4 2020 in reference aromas

AMD’s CEO, Dr. Lisa Su has also promised high-end Radeon RX Navi GPUs. Lisa also said that AMD is investing heavily in ray tracing for their separate GPU lineup for 2020, which would feature the 2nd generation RNDA architecture with hardware level integration to support ray tracing. The features you can expect from 2nd generation RDNA Navi GPUs are:

  • Optimized 7nm + process node
  • Enthusiastic desktop graphics card options
  • Hardware level support Ray Tracing
  • A mix of GDDR6 and HBM2 graphics cards
  • More energy efficient than first-generation Navi GPUs

AMD’s GPU side has been somewhat matte in recent years, and while the CPU side has made a great comeback, it’s time for Radeon to shine again. The last impressive launch I remember was Hawaii and the RX 5950 XT / 6950XT looks like it can reboot AMD’s competitive streak in the GPU side of things. Equipped with a process advantage over its competitors, and with NVIDIA cornered with its expensive Turing chips, this is one of the biggest opportunities for AMD Radeon to shine again.

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