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GPU
,→Navi RDNA 1.0
=== Navi RDNA 1.0 ===
* [https://www.amd.com/system/files/documents/rdna-whitepaper.pdf RDNA Whitepaper]* [https://gpuopen.com/wp-content/uploads/2019/08/RDNA_Architecture_public.pdf Architecture Slide Deck]
RDNA cards were first released in 2019. RDNA is a major change for AMD cards: the underlying hardware supports both Wave32 and Wave64 gangs of threads. Compute Units have 2x32 wide SIMD units, each of which executes 32 threads per clock tick. A Wave64 workgroup will execute on a single SIMD unit, but over two clock ticks. It should be noted that these Wave32 still have 5 cycles of latency before registers can be reused, so a Wave64 executing over two clock ticks will have fewer stalls than a Wave32.
