NVIDIA · 12 GB GDDR6 · 360 GB/s bandwidth ·
Google · 4.3B · model ctx up to 128K
Yes — the RTX 3060 12GB (12 GB GDDR6) can run gemma-3-4b-it. At Q4 with the default 8K context it needs ≈ 4.15 GB VRAM (weights 2.37 GB + KV cache 0.78 GB + 1 GB runtime overhead), which fits within 12 GB. Decode at Q4/8K: ≈ 58.7 tok/s (estimated, batch 1). FP16 (≈ 10.38 GB) also fits, at ≈ 16.2 tok/s (estimated). Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.
Fit & speed by quant and context
Quant
Context
VRAM needed
Fits?
tok/s (decode)
Q4
4K
3.76 GB
Yes
58.7est.
Q4
8K default
4.15 GB
Yes
58.7est.
Q4
32K
6.49 GB
Yes
58.7est.
FP16
4K
9.99 GB
Yes
16.2est.
FP16
8K default
10.38 GB
Yes
16.2est.
FP16
32K
12.72 GB
No
41.1est.
Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured
anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s
means the model is far beyond this card (offload-only territory).