Mistral on AMD RDNA3

Can I run Mistral Small 24B on an Radeon RX 7900 XTX?

Yes. Mistral Small 24B at Q4_K_M uses 15.5 GB of the 21.8 GB available on a Radeon RX 7900 XTX, and runs at about 38.6 tokens per second. You can push the context to 32K.

Runs comfortably

15.5 GB of 21.8 GB · 71%
022 GB
Weights 13.4 GB
KV cache 1.3 GB
Runtime overhead 0.8 GB

Mistral Small 24B at Q4_K_M leaves 6.3 GB spare on a Radeon RX 7900 XTX. There is room to raise the context length or move up a quantisation level.

Generation38.6tok/s
Prompt processing1096tok/s
Max context32Ktokens
KV per 1K tokens0GB

Every quantisation of Mistral Small 24B on a Radeon RX 7900 XTX

Highlighted row is the highest quality that still fits at 8K context.

QuantisationbpwWeights TotalVerdictMax ctxtok/s
FP16 / BF16 16.00 43.9 GB 46.0 GB Won't fit — 1.35
INT8 / W8A8 8.50 23.0 GB 25.1 GB Won't fit — 7.42
Q8_0 (GGUF) 8.50 23.0 GB 25.1 GB Won't fit — 7.42
FP8 (E4M3) 8.00 22.0 GB 24.0 GB Won't fit — 8.76
Q6_K 6.56 18.0 GB 20.1 GB Fits, but tight 19K 29.1
Q5_K_M 5.67 15.6 GB 17.6 GB Runs comfortably 32K 33.5
Q5_K_S 5.52 15.1 GB 17.2 GB Runs comfortably 32K 34.4
AWQ 4-bit 4.25 13.5 GB 15.6 GB Runs comfortably 32K 38.3
GPTQ 4-bit 4.25 13.5 GB 15.6 GB Runs comfortably 32K 38.3
MXFP4 4.25 13.5 GB 15.6 GB Runs comfortably 32K 38.3
Q4_K_M 4.85 13.4 GB 15.5 GB Runs comfortably 32K 38.6
Q4_K_S 4.58 12.7 GB 14.8 GB Runs comfortably 32K 40.6
Q4_0 4.55 12.6 GB 14.7 GB Runs comfortably 32K 40.8
IQ4_XS 4.25 11.9 GB 13.9 GB Runs comfortably 32K 43.3
Q3_K_M 3.91 11.0 GB 13.1 GB Runs comfortably 32K 46.6
IQ3_M 3.70 10.4 GB 12.5 GB Runs comfortably 32K 48.8
IQ3_XXS 3.06 8.8 GB 10.9 GB Runs comfortably 32K 57.3
Q2_K 2.63 7.7 GB 9.8 GB Runs comfortably 32K 64.9
IQ2_XXS 2.06 6.2 GB 8.3 GB Runs comfortably 32K 78.6
IQ1_M 1.75 5.4 GB 7.5 GB Runs comfortably 32K 88.9

Also worth checking

Mistral Small 24B on every GPU
Full hardware tableEverything that runs on a Radeon RX 7900 XTX
Full model tableWhy the KV cache is the part that bites
Guide