AMD ROCm confirms the number of CUs for Navi 32/33
ROCm is an open software platform of AMD, built for high flexibility and high performance, aimed at accelerated computing, and does not limit the programming language, enables participants in the machine learning and high-performance computing communities to accelerate code development with a variety of open source computing languages, compilers, libraries, and redesigned tools, suitable for large-scale computing and supporting multi-GPU computing.
Recently, Twitter user @Kepler_L2 discovered that after the ROCm update, the number of CUs for three RDNA 3-based GPUs was confirmed. In addition to the Navi 31 released by AMD, it also includes Navi 32 and Navi 33, and the corresponding numbers of CUs and stream processors are:
- Navi 31 – 96 CUs / 6144 Stream Processors
- Navi 32 – 60 CUs / 3840 Stream Processors
- Navi 33 – 32 CUs / 2048 Stream Processors
At present, Navi 31 is used for Radeon RX 7900 XTX and Radeon RX 7900 XT graphics cards. The memory interface width is 384 bits, the Infinity Cache is 96MB, and the size of 1x GCD + 6x MCD is about 522 mm². Navi 32, code-named Wheat Nas, will also adopt MCM design, with a memory interface width of 256 bits, Infinity Cache of 64MB, one GCD and four MCDs, and a size of about 348 mm², which may correspond to the Radeon RX 7800 series. Navi 33, code-named Hotpink Bonefish, continues to use a single-chip design, with a memory interface width of 128 bits, an Infinity Cache of 32MB, and a chip size of about 203 mm², which may correspond to the Radeon RX 7600 series.
