Can the Radeon RX 7900 XTX run Granite 4.2 8B?
Yes. Granite 4.2 8B fits the Radeon RX 7900 XTX's 24 GB at Q4_K_M (about 6.8 GB needed), running at an estimated 110 tok/s. There's room for up to FP16 if you want higher quality.
Every quantization
Granite 4.2 8B (8.8B) on 24 GB
| Quant | Weights | Needs | Fit | Est. speed |
|---|---|---|---|---|
| Q4_K_M | 5 GB | 6.8 GB | Fits easily | ~110 tok/s |
| Q5_K_M | 6 GB | 7.8 GB | Fits easily | ~92 tok/s |
| Q8_0 | 9 GB | 10.8 GB | Fits easily | ~61 tok/s |
| FP16 | 18 GB | 19.8 GB | Fits | ~31 tok/s |
Estimates. Needs = weights + 1.8 GB for KV cache and runtime at modest context. Speed is single-stream decode scaled from the Radeon RX 7900 XTX's 960 GB/s bandwidth (Estimated from memory bandwidth (llama.cpp decode)). Long contexts need more memory and run slower.
Run it
Copy, paste, go
llama-server -hf ibm-granite/granite-4.2-8b-GGUF -ngl 99Ollama pulls a Q4 build by default. Pick a larger quant only if the table above says it fits. Full Granite 4.2 8B details →
Compare
Same model, other hardware - and other models on this card
Granite 4.2 8B on other hardware
- RTX 5090~206 tok/s
- RTX 5090 D~205 tok/s
- RTX 6000D~180 tok/s
- RTX 4090~125 tok/s
- RTX 3090~110 tok/s
- RTX 5080~110 tok/s
- RTX 3080 Ti~105 tok/s
- RTX 5080 Mobile~103 tok/s
Also runs on the Radeon RX 7900 XTX
- Qwen3-Coder-30B-A3B-Instruct~207 tok/s
- Qwen3-30B-A3B-Instruct-2507~207 tok/s
- Qwen3.6 27B~34 tok/s
- Qwen3.8 27B~34 tok/s
- Gemma 4 26B A4B~162 tok/s
- gpt-oss-20b~183 tok/s
- Nemotron 3.5 Lightning~55 tok/s
- Qwen2.5-Coder-14B-Instruct~61 tok/s
Frequently asked
Quick answers
Can the AMD Radeon RX 7900 XTX run Granite 4.2 8B?
Yes. Granite 4.2 8B fits the Radeon RX 7900 XTX's 24 GB at Q4_K_M (about 6.8 GB needed), running at an estimated 110 tok/s. There's room for up to FP16 if you want higher quality.
How much VRAM does Granite 4.2 8B need?
About 5 GB of weights at Q4_K_M, 9 GB at Q8_0 and 18 GB at FP16. Add roughly 1.8 GB for the KV cache and runtime at modest context lengths.
How fast is Granite 4.2 8B on the Radeon RX 7900 XTX?
Roughly 110 tokens per second at Q4_K_M (single user, llama.cpp-style decode). This is an estimate from the Radeon RX 7900 XTX's 960 GB/s memory bandwidth.