Can I Run Qwen 2.5 7B Instruct on AMD Radeon RX 7800 XT?
Written by Jakub Rusinowski · Last updated September 29, 2026
Yes. Qwen 2.5 7B Instruct needs 5.9 GB at 8K context (4.6 GB weights + 1.3 GB KV cache/overhead) at Q4_K_M and the AMD Radeon RX 7800 XT has 16 GB, leaving about 10.1 GB of headroom, at roughly 65 tok/s (estimated) with room for up to 128K of context.
See what else this hardware can run →
The numbers
| Model | Qwen 2.5 7B Instruct |
| Parameters | 7B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 5.9 GB |
| AMD Radeon RX 7800 XT VRAM | 16 GB |
| Verdict | Runs |
| Max context | 128K |
| Estimated speed | ~65 tok/s |
Qwen 2.5 7B Instruct on the AMD Radeon RX 7800 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 16.5 GB | ✗ No | — | — |
| Q8_0 | 9.3 GB | ✓ Yes | 64K | — |
| Q6_K | 7.5 GB | ✓ Yes | 128K | — |
| Q5_K_M | 6.7 GB | ✓ Yes | 128K | — |
| Q4_K_M | 5.9 GB | ✓ Yes | 128K | — |
| Q3_K_M | 4.5 GB | ✓ Yes | 128K | — |
| Q2_K | 3.8 GB | ✓ Yes | 128K | — |
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 5.9 GB · 32K 7.3 GB · 128K 12.9 GB. Every window this model publishes still fits 16 GB.
What to do next
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
No compatible GPU? Qwen 2.5 7B Instruct on 8 GB of system RAM, CPU only: runs, but it is tight.
Running Qwen 2.5 7B Instruct on this card:
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.
Other Qwen 2.5 Family sizes on the AMD Radeon RX 7800 XT
- Qwen 2.5 72B Instruct — does not fit (47 GB)
- Qwen 2.5 Coder 32B — runs at a lower quant (22.3 GB)
- Qwen 2.5 14B Instruct — runs (10.9 GB)
Qwen 2.5 7B Instruct on nearby hardware
- Intel Arc B580 (12 GB) — runs
- AMD Radeon RX 7900 XT (20 GB) — runs
All Qwen 2.5 Family sizes on the AMD Radeon RX 7800 XT | Qwen 2.5 7B Instruct model page | AMD Radeon RX 7800 XT GPU page | VRAM calculator | Check your hardware