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by fanf2 984 days ago
Don’t forget the SIMD registers which can be 128/256/512 wide (neon/avx2/avx512)

It’s very difficult to give just a single number for data bus width. Do you add all the DRAM channels? DDR5 has 2 x 32 bit channels where DDR4 has a 64 bit channel. What does bus width mean for PCIe, which uses very fast differential serial lines? Really, it hasn’t been a useful way to describe system performance since the 1990s.