NVIDIA · 24 GB GDDR6X · 936 GB/s bandwidth ·
Google · 1.0B · model ctx up to 32K
Yes — the RTX 3090 24GB (24 GB GDDR6X) can run gemma-3-1b-it. At Q4 with the default 8K context it needs ≈ 1.75 GB VRAM (weights 0.55 GB + KV cache 0.2 GB + 1 GB runtime overhead), which fits within 24 GB. Decode at Q4/8K: ≈ 595.6 tok/s (estimated, batch 1). FP16 (≈ 3.2 GB) also fits, at ≈ 163.8 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
1.65 GB
Yes
595.6est.
Q4
8K default
1.75 GB
Yes
595.6est.
Q4
32K
2.35 GB
Yes
595.6est.
FP16
4K
3.1 GB
Yes
163.8est.
FP16
8K default
3.2 GB
Yes
163.8est.
FP16
32K
3.8 GB
Yes
163.8est.
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).