NVIDIA says ModelExpress cuts DeepSeek-V4 Pro startup from 8 minutes to under 2
pmttyji · reddit · 2026-07-25
NVIDIA says it cut DeepSeek-V4 Pro startup time from 8 minutes to under 2 minutes by moving weights over the fastest path to GPU memory with GPU-to-GPU RDMA.
- The optimization uses NVIDIA ModelExpress (MX) inside Dynamo for weight distribution and cache management.
- MX reuses kernel caches and lets inference workers fetch updated weights directly from other GPUs over NIXL, avoiding centralized broadcasts and keeping weight movement off the critical path.
- NVIDIA says the same approach also speeds up inference and RL post-training.
The accompanying architecture diagram shows MX Server brokering metadata while weights move either P2P GPUDirect RDMA via NIXL or from storage into the new engine.
Related event: NVIDIA Slashes DeepSeek-V4 Pro Startup Time to Under 2 Minutes(4 posts)→
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