Can I Run Magistral Small on AMD Radeon RX 7900 XT?
作者： Jakub Rusinowski · 最后更新： 2026年9月6日
Yes, comfortably — Magistral Small 24B at Q4_K_M needs 17 GB at 8K context (14.5 GB weights + 2.5 GB KV cache/overhead), leaving ~3 GB of the AMD Radeon RX 7900 XT's 20 GB, at ~30 tok/s (est.), with room for up to 16K context.
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AMD Radeon RX 7900 XT Specs
| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
Magistral Small 24B on the AMD Radeon RX 7900 XT: VRAM by quantization
| Quant | VRAM needed | Fits 20 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 50.5 GB | ✗ No | — | — |
| Q8_0 | 28 GB | ✗ No | — | — |
| Q6_K | 22.2 GB | ✗ No | — | — |
| Q5_K_M | 19.5 GB | ✓ Yes | 8K | — |
| Q4_K_M | 17 GB | ✓ Yes | 16K | — |
| Q3_K_M | 12.7 GB | ✓ Yes | 32K | — |
| Q2_K | 10.4 GB | ✓ Yes | 32K | — |
Assumes an 8K-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 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 17 GB · 32K 22 GB ✗ · 128K 42.1 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? Magistral Small 24B on 16 GB of system RAM, CPU only: runs, but it is tight.
Magistral Small Sizes That Fit the AMD Radeon RX 7900 XT (at 8K context)
| Magistral Small 24B | Q4_K_M · 17 GB at 8K context · ~30 tok/s (est.) |
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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
Can I run Magistral Small on the AMD Radeon RX 7900 XT?
Yes, comfortably — Magistral Small 24B at Q4_K_M needs 17 GB at 8K context (14.5 GB weights + 2.5 GB KV cache/overhead), leaving ~3 GB of the AMD Radeon RX 7900 XT's 20 GB, at ~30 tok/s (est.), with room for up to 16K context.
What's the best Magistral Small size for the AMD Radeon RX 7900 XT?
Magistral Small 24B at Q4_K_M quantization needs 17 GB at 8K context (14.5 GB weights + 2.5 GB KV cache/overhead), estimated ~30 tokens/sec, up to 16K context.
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- Magistral Small on NVIDIA GeForce RTX 4080 Super
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