Fifteen Years of FP64 Segmentation, and Why the Blackwell Ultra Breaks the Pattern
Hacker News
February 19, 2026
Buy an RTX 5090, the fastest consumer GPU money can buy, and you get 104.8 TFLOPS of FP32 compute. Ask it to do double-precision math and you get 1.64 TFLOPS. That 64:1 gap is not a technology limitation. For fifteen years, the FP64:FP32 ratio has been slowly getting wider on consumer GPUs, widening the divide between consumer and enterprise silicon. Now the AI boom is quietly dismantling that logic.
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Originally published on Hacker News on 2/19/2026