ChipsHacker Newsabout 2 hours ago
What happens when a GPU reads memory
1 min read
A GPU global load traverses L1, TLB, crossbar, L2, and DRAM. On an RTX 4090, L1 hits take 15.4 ns, TLB misses 4.4 ns, and L2 hits 127 ns. The path involves 32-byte sectors, 128-byte lines, and 36 L2 slices.
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