Running 27B Models on a Single RTX 5090: Multi-GPU vs. Edge Deployment Stats

Fz1zz · reddit · 2026-08-13

After acquiring an RTX 5090, a developer shared performance metrics and hardware advice for local LLM deployment.

Main Rig: Running the Qwen3.6-27B model on a single 5090 with a 160k context, Flash Attention, and Multi-Token Prediction (MTP). The author argues that adding a 4070 Ti Super for a multi-GPU setup would likely slow things down rather than help, preferring to sell the old card.
Edge Device: On a NucBox K8 Plus mini PC with an AMD Ryzen 7 8845HS, utilizing the iGPU and unified memory to run Gemma-4-26B, the setup achieved 343 t/s prefill and 31.4 t/s decode speeds.

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