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Full Kimi K3 (2.8T params) running on 80x RTX 5090s at 20 tok/s single stream, no HBM needed

LaunchSource: xAuthor: totheagiHotness: 3946Published Jul 28, 2026

The team successfully runs the full Kimi K3 model (2.8T params) on 80 RTX 5090 gaming GPUs, a first for open weights frontier model using GDDR7 and official MXFP4 weights without HBM. Single stream 20 tok/s with room for improvement.

  • RTX 5090
  • open weights
  • MXFP4
  • Kimi K3
  • 2.8T
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