Can RTX 5070 Ti run Qwen3.8 27B?

Q: Can RTX 5070 Ti run Qwen3.8 27B?

Yes. Measured 139 tok/s generation on RTX 5070 Ti, via capy-flash (1 GPU), MTP, decode at 8k prompt, 3-bit GSQ. Source: https://github.com/ValerioDolci/capy-flash At Q4_K_M the weights are about 16.5 GB, more than 16 GB, so Q4_K_M doesn't fully fit without offloading part of the model to system RAM.

Yes. Measured 139 tok/s generation (capy-flash (1 GPU), MTP, decode at 8k prompt, 3-bit GSQ; source).

Every measured result for Qwen3.8 27B on RTX 5070 Ti

Build	Quant / setup	Engine	tok/s
Dual RTX 5070 Ti on Ryzen 9 9900X (capy-flash maintainer rig)	3-bit GSQ	capy-flash (1 GPU), MTP, decode at 8k prompt	139	source

Memory: RTX 5070 Ti has 16 GB. Qwen3.8 27B weights are about 16.5 GB at Q4_K_M (27B params × 4.89 bits ÷ 8, before context/KV cache). Arithmetic, not a measurement; long contexts need more. Check other quants in the VRAM calculator. At Q4_K_M the weights are about 16.5 GB, more than 16 GB, so Q4_K_M doesn't fully fit without offloading part of the model to system RAM.

Speeds are decode (generation) tokens/sec as reported by each source; quant, engine and context differ, so small gaps are noise.

All measured speeds for Qwen3.8 27B: best home rig for Qwen3.8 27B.

Qwen3.8 27B on other hardware: 2x Apple M5 Ultra · 2x Intel Arc Pro B70 · 2x RTX 5070 Ti · 2x Tesla V100 32GB · 4x Apple M5 Ultra · Apple M3 Ultra · Apple M5 Ultra · DGX Spark (GB10) · Intel Arc Pro B70 · RTX 3060 12GB · RTX 3090 · RTX 4060 Ti 16GB · RTX 5090 · RTX Pro 6000 Max-Q (Blackwell, 96 GB, 300 W) · RTX Spark N1X · Radeon AI Pro R9700 · Strix Halo (Radeon 8060S)

Other models measured on RTX 5070 Ti: Gemma 4 12B · gpt-oss 20B

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