NVIDIA · 8 GB GDDR6 · 272 GB/s bandwidth ·
Microsoft · 3.8B · model ctx up to 128K
Yes — the RTX 4060 8GB (8 GB GDDR6) can run Phi-4-mini-reasoning. At Q4 with the default 8K context it needs ≈ 3.85 GB VRAM (weights 2.09 GB + KV cache 0.76 GB + 1 GB runtime overhead), which fits within 8 GB. Decode at Q4/8K: ≈ 45.6 tok/s (estimated, batch 1). FP16 needs ≈ 9.36 GB — does not fit on this card. 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
3.47 GB
Yes
45.6est.
Q4
8K default
3.85 GB
Yes
45.6est.
Q4
32K
6.13 GB
Yes
45.6est.
FP16
4K
8.98 GB
No
28.4est.
FP16
8K default
9.36 GB
No
26.1est.
FP16
32K
11.64 GB
No
16.9est.
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).