08:12
2026-08-22
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artificial-intelligence
RTX 4090 global loads take 15 ns at L1, 127 ns at L2, 255 ns at DRAM
A single LDG.E instruction on an NVIDIA RTX 4090 takes 15 nanoseconds when served from L1 cache, 127 nanoseconds from L2, and 255 nanoseconds from DRAM, revealing a 17× latency gap for memory-bound wo…