Can I Run Qwen 3 on AMD Radeon RX 7800 XT?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 29 września 2026
Yes, comfortably — Qwen 3 14B at Q4_K_M needs 11.1 GB at 8K context (8.9 GB weights + 2.2 GB KV cache/overhead), leaving ~4.9 GB of the AMD Radeon RX 7800 XT's 16 GB, at ~37 tok/s (est.), with room for up to 32K context.
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AMD Radeon RX 7800 XT Specs
| VRAM | 16 GB |
| Memory Bandwidth | 624 GB/s |
Qwen 3 14B on the AMD Radeon RX 7800 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 31.7 GB | ✗ No | — | — |
| Q8_0 | 17.9 GB | ✗ No | — | Build for this |
| Q6_K | 14.3 GB | ✓ Yes | 16K | — |
| Q5_K_M | 12.6 GB | ✓ Yes | 16K | Build for this |
| Q4_K_M | 11.1 GB | ✓ Yes | 32K | Build for this |
| Q3_K_M | 8.5 GB | ✓ Yes | 32K | — |
| Q2_K | 7 GB | ✓ Yes | 32K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “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.
Context costs VRAM too. At Q4_K_M on the AMD Radeon RX 7800 XT: 8K 11.1 GB · 32K 15.1 GB · 125K 30.7 GB ✗. Past 125K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Qwen 3 14B on 16 GB of system RAM, CPU only: runs, but it is tight.
Qwen 3 Sizes That Fit the AMD Radeon RX 7800 XT (at 8K context)
| Qwen 3 14B | Q4_K_M · 11.1 GB at 8K context · ~37 tok/s (est.) |
| Qwen 3 8B | Q4_K_M · 7 GB at 8K context · ~58 tok/s (est.) |
At 2 hrs/day, buying (~$499) beats renting at $0.34/hr after about 2.0 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
FAQ
Does the AMD Radeon RX 7800 XT have enough VRAM for Qwen 3?
Yes, comfortably — Qwen 3 14B at Q4_K_M needs 11.1 GB at 8K context (8.9 GB weights + 2.2 GB KV cache/overhead), leaving ~4.9 GB of the AMD Radeon RX 7800 XT's 16 GB, at ~37 tok/s (est.), with room for up to 32K context.
Which quantization of Qwen 3 should I use on the AMD Radeon RX 7800 XT?
Qwen 3 14B at Q4_K_M quantization needs 11.1 GB at 8K context (8.9 GB weights + 2.2 GB KV cache/overhead), estimated ~37 tokens/sec, up to 32K context.
Every Qwen 3 size on the AMD Radeon RX 7800 XT
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Qwen 3 235B-A22B (MoE) | 144.3 GB | Does not fit | — |
| Qwen 3 32B | 22.8 GB | Runs at Q2_K | — |
| Qwen 3 30B-A3B (MoE) | 20 GB | Runs at Q3_K_M | — |
| Qwen 3 14B | 11.1 GB | Runs | ~37 tok/s |
| Qwen 3 8B | 7 GB | Runs | ~58 tok/s |
Qwen 3 on Other GPUs
- Qwen 3 on NVIDIA GeForce RTX 5080
- Qwen 3 on NVIDIA GeForce RTX 5070 Ti
- Qwen 3 on NVIDIA GeForce RTX 5060 Ti 16GB
- Qwen 3 on NVIDIA GeForce RTX 4080 Super
- Qwen 3 on NVIDIA GeForce RTX 4080
Popular Models on the AMD Radeon RX 7800 XT
VRAM Tier
Troubleshooting
Buying Guide
← Can I Run It? | Qwen 3 Model Page | AMD Radeon RX 7800 XT GPU Page | VRAM calculator | Check Your Hardware