Can I Run Devstral Small 2 24B on AMD Radeon RX 7800 XT?
作者： Jakub Rusinowski · 最后更新： 2026年9月19日
Not at Q4_K_M — that needs 14.5 GB and the AMD Radeon RX 7800 XT has 16 GB. Drop to Q3_K_M and it fits in 12.7 GB, with up to 16K of context.
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The numbers
| Model | Devstral Small 2 24B |
| Parameters | 24B |
| Quantization | Q4_K_M |
| VRAM needed | 14.5 GB |
| AMD Radeon RX 7800 XT VRAM | 16 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q3_K_M (12.7 GB) |
| Max context | 16K |
Devstral Small 2 24B on the AMD Radeon RX 7800 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 49.6 GB | ✗ No | — | — |
| Q8_0 | 27.1 GB | ✗ No | — | — |
| Q6_K | 21.3 GB | ✗ No | — | — |
| Q5_K_M | 18.6 GB | ✗ No | — | — |
| Q4_K_M | 16.1 GB | ✗ No | — | — |
| Q3_K_M | 11.9 GB | ✓ Yes | 16K | — |
| Q2_K | 9.5 GB | ✓ Yes | 32K | — |
Assumes a 4K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. 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 17 GB ✗ · 32K 22 GB ✗ · 128K 42.1 GB ✗. Past 8K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.
No compatible GPU? Devstral on 16 GB of system RAM, CPU only: runs, but it is tight.
Running Devstral Small 2 24B on this card:
Devstral Small 2 24B needs ~14 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.
Other Devstral sizes on the AMD Radeon RX 7800 XT
- Devstral-2 123B — does not fit (74.3 GB)
- Devstral Small 2505 24B — runs (14.5 GB)
- Devstral 2 22B — runs (13.3 GB)
Devstral Small 2 24B on nearby hardware
- Intel Arc B580 (12 GB) — runs at a lower quant
- AMD Radeon RX 7900 XT (20 GB) — runs
All Devstral sizes on the AMD Radeon RX 7800 XT | Devstral Small 2 24B model page | AMD Radeon RX 7800 XT GPU page | Check your hardware