RTX 5090 workstation: Qwen3.8 Flash-Next IQ3_S at 159.2 tok/s on Strata (expert offload)

Name: RTX 5090 workstation: Qwen3.8 Flash-Next IQ3_S at 159.2 tok/s on Strata (expert offload)
Creator: RigBase
License: https://creativecommons.org/licenses/by/4.0/

GPU(s)	RTX 5090 Amazon · eBay (used) · Newegg
VRAM / unified memory (GB)	32
CPU
Motherboard
RAM
PSU
Other	Strata expert-offload engine: hot experts on the GPU, all experts in system RAM, ~29 GB lookup table on SSD; GPU also drives the Hyprland desktop (4 GiB reserve)
Reported total cost
Power

Measured speed (generation tokens/sec)

📏 How measured: reported by the original source; RigBase re-checked the numbers at that source

Model	Quant	Engine	tok/s	Details
Qwen3.8 Flash-Next	IQ3_S (~55 GB), experts offloaded to RAM, speculation helper	Strata	159.2

AkitaOnRails LLM Benchmark v4, 22 Oct 2026. Qwen3.8 Flash-Next runs with CPU offload of experts (Strata). Scored 91.0 (Tier A) on the author's code-review benchmark. With the 4 GiB desktop reserve, throughput in the initial measurement went from ~200 to ~150 tok/s. Ornith-1.5-35B-A3B Q8_0 on the same card/engine: ~80 tok/s.

Current GPU street price (estimate, not the builder's cost)

1× RTX 5090: ≈€6,199 each (≈$6,948), new, approx. price as of 2026-10-16, lowest listing on billiger.de (Asus GeForce RTX 5090 (lowest variant))

Estimated GPU cost for this build today: ≈€6,199
New retail prices in Germany incl. VAT; used cards are often much cheaper. Prices change daily.

Source: https://akitaonrails.github.io/en/2026/10/22/llm-benchmark-v4-consumer-open-source-rtx5090-strix-halo-strata/

Blank fields = not stated in the source. We never estimate build data; GPU street prices above are separately sourced and dated.

Rent before you buy: try this model on a cloud GPU for a few dollars first: Runpod (referral link; sign up with Google to get the new-user bonus)

Quick answers: Can RTX 5090 run Qwen3.8 Flash-Next?