Written by Jakub Rusinowski · Last updated September 11, 2026
Yes, comfortably — you'll have ~5.5 GB of headroom running Devstral Small 2505 24B at Q4_K_M (14.5 GB, ~31 tok/s (est.)) with room for up to 16K context.
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or compare on Vast.ai from $0.35/hr (typical low · varies)
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| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
| Quant | VRAM needed | Fits 20 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 49.5 GB | ✗ No | — | — |
| Q8_0 | 27 GB | ✗ No | — | — |
| Q6_K | 21.2 GB | ✗ No | — | — |
| Q5_K_M | 18.5 GB | ✓ Yes | 8K | — |
| Q4_K_M | 16 GB | ✓ Yes | 16K | — |
| Q3_K_M | 11.7 GB | ✓ Yes | 32K | — |
| Q2_K | 9.4 GB | ✓ Yes | 64K | — |
Assumes a 4K-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 20 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 7900 XT: 8K 16.6 GB · 32K 20.7 GB ✗ · 128K 36.8 GB ✗. Past 32K it no longer fits 20 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Devstral Small 2505 24B on 16 GB of system RAM, CPU only: runs, but it is tight.
| Devstral Small 2505 24B | Q4_K_M · 14.5 GB · ~31 tok/s (est.) |
| Devstral Small 2 24B | Q4_K_M · 14.5 GB · ~30 tok/s (est.) |
| Devstral-2 22B (Unverified Listing) | Q4_K_M · 13.3 GB · ~33 tok/s (est.) |
At 2 hrs/day, buying (~$899) beats renting at $0.34/hr after about 3.7 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.
Yes, comfortably — you'll have ~5.5 GB of headroom running Devstral Small 2505 24B at Q4_K_M (14.5 GB, ~31 tok/s (est.)) with room for up to 16K context.
Devstral Small 2505 24B at Q4_K_M quantization (14.5 GB), estimated ~31 tokens/sec, up to 16K context.
| Size | VRAM | Verdict | Speed |
|---|---|---|---|
| Devstral-2 123B | 74.3 GB | Does not fit | — |
| Devstral Small 2505 24B | 14.5 GB | Runs | ~31 tok/s |
| Devstral Small 2 24B | 14.5 GB | Runs | ~30 tok/s |
| Devstral-2 22B (Unverified Listing) | 13.3 GB | Runs | ~33 tok/s |
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