Can you run Qwen3.8 27B on RTX 5070 Ti?
Qwen3.8 27B Q4_K_M on the NVIDIA GeForce RTX 5070 Ti — verdict, VRAM math and estimated speed.
Yes, but slowly — Qwen3.8 27B spills past the RTX 5070 Ti. 16.5 GB weights at Q4_K_M vs 14.4 GB usable VRAM; ~6 tok/s est..
VRAM math and speed are ModelFit engine estimates, not measurements. Commands are registry-verified Ollama tags.
Cite this page: ModelFit, Qwen3.8 27B on RTX 5070 Ti, https://modelfit.io/can-i-run/qwen3.8-27b-q4-on-rtx-5070-ti/, updated September 2026, CC BY 4.0.
Last updated: September 3, 2026 · Editor: ModelFit Team
Quant explorer
Switch between the quality-gated builds tracked for this exact combo. Q4_K_M stays the default recommendation; heavier Q6/Q8 builds only appear when their exact Ollama tags are registry-verified.
Why no 2-bit builds: Q1/Q2-class quants can look attractive in a memory table, but their quality loss is large enough that ModelFit excludes them from rankings instead of inflating the catalog with junk options. Usable VRAM: 14.4 GB.
Workload verdicts
Qwen3.8 27B on the RTX 5070 Ti, graded per use case from the model's registry-verified tuning and the engine's speed estimate for this exact combo.
Grades combine tag-verified tuning (a model not built for the workload caps at C) with the tok/s floor each workload needs to feel usable. A combo that partially offloads caps at C; one that does not fit is D everywhere.
Memory math: weights + context vs budget
Weights take 16.5 GB. Context costs extra KV-cache on top — this is where long-context sessions break on cards that technically fit the weights.
This configuration exceeds the comfortable VRAM budget by about 3.1 GB. Expect offload pressure or a shorter safe context.
KV-cache figures assume an fp16 cache, the llama.cpp/Ollama default. Standard GQA models use a size-class estimate (8 KV heads x 128 head dim class); hybrid linear-attention models (Qwen3.5/3.6, Qwen3-Next) use the exact per-token cost from their published config, since only their sparse full-attention layers cache KV. A q8_0 KV cache roughly halves either figure. Estimates, not measurements.
See how fast it feels
A deterministic typing simulation for Qwen3.8 27B: first token ~1.1s (instant prefill), then ~6 tokens/sec.
ModelFit engine estimate, not a measured benchmark. Real speed varies with prompt length, thermals, runtime, and KV-cache settings.
Upgrade path
The cheapest tracked card that runs Qwen3.8 27B comfortably is the AMD Radeon RX 7900 XT (20 GB VRAM).
See the RX 7900 XT pageQwen3.8 27B on RTX 5070 Ti: FAQ
Can the NVIDIA GeForce RTX 5070 Ti run Qwen3.8 27B?
Barely. Qwen3.8 27B (Q4_K_M) needs about 16.5 GB but the RTX 5070 Ti has 14.4 GB usable VRAM, so part of the model spills to system RAM and speed drops to at roughly 6 tokens/sec (est.).
How much VRAM does Qwen3.8 27B need?
About 16.5 GB for the weights at Q4_K_M, plus KV-cache for context: roughly 1.0 GB extra at 16k tokens. The RTX 5070 Ti budget is 14.4 GB (16 GB x 90%).
What is the best quantization of Qwen3.8 27B for the RTX 5070 Ti?
Stick with the Q4_K_M build at 16.5 GB — every heavier quant exceeds the 14.4 GB usable VRAM.
What GPU do I need to run Qwen3.8 27B comfortably?
The cheapest tracked card that runs Qwen3.8 27B (Q4_K_M) fully in VRAM is the AMD Radeon RX 7900 XT (20 GB).