Best VLLM setup for Qwen3.8 Flash Next on 2x5090 + 128GB of RAM?

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Hi all, I am running Qwen3.8-27B for a local setup with 2x5090s where the use case is mostly agentic programming. For this, VLLM is the only framework that does not trash the cache and allows for efficient use. I am currently using Qwen3.8-27B-INT6-Mixed-AutoRound from Minachist with pretty good results. But I am considering to try Flash Next on this rig, and while I've seen lots of discussions with different framewors, and many new vibe-coded ones, I haven't found a good balanced recipe for 2x5090s, flash-next and vllm. It seems pretty different to serve than Qwen3.8-27B where you fit everything on VRAM, so I'd like to know what are people doing. If you have experience with this kind of setup, could you share it? Thanks!   submitted by   /u/TooManyPascals [link]   [comments]