Can I Run Qwen 3.5 on NVIDIA GeForce RTX 5080?

Name: LLM Configurator — GPU VRAM Checker
Author: LLM Configurator

作者： Jakub Rusinowski · 最后更新： 2026年2月24日

Yes, comfortably — you'll have ~9.4 GB of headroom running Qwen 3.5 9B at Q4_K_M (6.6 GB, ~145 tok/s (est.)) with room for up to 8K context.

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在亚马逊查看价格 — NVIDIA GeForce RTX 5080 16GB

NVIDIA GeForce RTX 5080 Specs

VRAM	16 GB
Memory Bandwidth	960 GB/s

Qwen 3.5 9B on the NVIDIA GeForce RTX 5080: VRAM by quantization

Quant	VRAM needed	Fits 16 GB?	Max context
F16	21.7 GB	✗ No	—
Q8_0	13.2 GB	✓ Yes	4K
Q6_K	11.1 GB	✓ Yes	8K
Q5_K_M	10.1 GB	✓ Yes	8K
Q4_K_M	9.1 GB	✓ Yes	8K
Q3_K_M	7.5 GB	✓ Yes	8K
Q2_K	6.6 GB	✓ Yes	16K

VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 16 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.

Qwen 3.5 Sizes That Fit the NVIDIA GeForce RTX 5080

Qwen 3.5 9B	Q4_K_M · 6.6 GB · ~145 tok/s (est.)
Qwen 3.5 4B	Q4_K_M · 3.4 GB · ~282 tok/s (est.)
Qwen 3.5 2B	Q4_K_M · 2.7 GB · ~356 tok/s (est.)
Qwen 3.5 0.8B	Q4_K_M · 1 GB · ~400 tok/s (est.)

Buy vs. rent Qwen 3.5

Buy the GPU

~$999

NVIDIA GeForce RTX 5080 · MSRP

Rent by the hour

from $0.34/hr

RTX 4090 (24 GB) class

At 2 hrs/day, buying (~$999) beats renting at $0.34/hr after about 4.1 years.

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Rent on RunPod →

Vast.ai $0.35/hr · typical low · varies