Written by Jakub Rusinowski · Last updated August 15, 2026
Not at Q4_K_M — that needs 18.4 GB and the AMD Radeon RX 7800 XT has 16 GB. Drop to Q3_K_M and it fits in 14.6 GB, with up to 8K of context.
| Model | Qwen 3 30B-A3B (MoE) |
| Parameters | 30B (3B active) |
| Quantization | Q4_K_M |
| VRAM needed | 18.4 GB |
| AMD Radeon RX 7800 XT VRAM | 16 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q3_K_M (14.6 GB) |
| Max context | 8K |
Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.
Running Qwen 3 30B-A3B (MoE) on this card:
Qwen 3 30B-A3B (MoE) needs ~18 GB but this GPU has 16 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
All Qwen 3 sizes on the AMD Radeon RX 7800 XT | VRAM calculator for Qwen 3 30B-A3B (MoE) | AMD Radeon RX 7800 XT GPU page | Check your hardware