Can I Run Qwen 3.5 397B-A17B on AMD Radeon RX 7900 XT?

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

作者： Jakub Rusinowski · 最后更新： 2026年8月15日

No. Qwen 3.5 397B-A17B needs 134.0 GB at IQ2_M (sub-Q4) and the AMD Radeon RX 7900 XT has only 20 GB. No quantization we publish closes a gap that size.

The numbers

Model	Qwen 3.5 397B-A17B
Parameters	397B (17B active)
Quantization	IQ2_M (sub-Q4)
VRAM needed	134.0 GB
AMD Radeon RX 7900 XT VRAM	20 GB
Verdict	Does not fit

What to do next

Either step down to a smaller size in this family, or move to a Apple M2 Ultra (192 GB), the cheapest card we track with enough VRAM.

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Cheapest card we track with enough VRAM for Qwen 3.5 397B-A17B:

Apple Mac Studio M2 Ultra

192 GB VRAM · 60 W board power

2026年价格波动较大——请以当前商品页价格为准。

在亚马逊查看价格

Won't fit — rent Qwen 3.5 397B-A17B instead

Qwen 3.5 397B-A17B needs ~134 GB but this GPU has 20 GB. Rent a 2× A100 (160 GB)-class GPU by the hour instead of buying one:

Affiliate links — we may earn a commission if you sign up, at no extra cost to you.

Vast.ai $1.54/hr · typical low · varies

Rent on Vast.ai →

RunPod $2.78/hr

Rent on RunPod →

Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.

Other Qwen 3.5 sizes on the AMD Radeon RX 7900 XT

Qwen 3.5 122B-A10B — does not fit (73.7 GB)
Qwen 3.5 35B-A3B — runs at a lower quant (21.1 GB)
Qwen 3.5 27B — runs (16.3 GB)
Qwen 3.5 9B — runs (5.4 GB)
Qwen 3.5 4B — runs (2.4 GB)
Qwen 3.5 2B — runs (1.2 GB)
Qwen 3.5 0.8B — runs (0.5 GB)

Qwen 3.5 397B-A17B on nearby hardware

Intel Arc B580 (12 GB) — does not fit
NVIDIA GeForce RTX 4090 (24 GB) — does not fit

All Qwen 3.5 sizes on the AMD Radeon RX 7900 XT | VRAM calculator for Qwen 3.5 397B-A17B | AMD Radeon RX 7900 XT GPU page | Check your hardware