IBM

Granite 4.1 Guardian 8B

IBM·8B·Granite·128K ctx·2026-08

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Model size→Hardware requirement→Actual fit

Granite 4.1 Guardian 8B needs ~8.1–14.4 GB of VRAM depending on quantization. The bar is what it needs; the marker is the card's VRAM. Speed figures below are planning estimates.

8 GB

RTX 4060 · 3060 Ti

8.1
8
Q4_K_M · Est. ~3 tok/sSlow · CPU offload

12 GB

RTX 4070 · 3060 12G

9.4
12
Q5_K_M · Est. ~33 tok/sComfortable

16 GB

RTX 4080 · M-series 16G

14.4
16
Q8_0 · Est. ~33 tok/sComfortable

24 GB

RTX 4090 · 3090

14.4
24
Q8_0 · Est. ~51 tok/sComfortable

48 GB

A6000 · 2×24G

14.4
48
Q8_0 · Est. ~51 tok/sComfortable

02  — Quantizations

QuantFile sizeEst. VRAM
Q4_K_M6.9 GB8.1 GB
Q5_K_M8.2 GB9.4 GB
Q8_013.2 GB14.4 GB

03  — Runtimes & use

llama.cpp · Ollama · LM Studio

General · Fast

Memory and speed figures are planning estimates, not measured benchmarks. Memory includes a fixed allowance for KV cache and runtime overhead. Long-context prompts push VRAM use above the numbers shown here.