Can Titan Xp 12GB run Llama-3.1-8B-Instruct?

NVIDIA · 12 GB GDDR5X · 548 GB/s bandwidth · Meta · 8.0B · model ctx up to 128K

CUDA

Yes — the Titan Xp 12GB (12 GB GDDR5X) can run Llama-3.1-8B-Instruct. At Q4 with the default 8K context it needs ≈ 7.0 GB VRAM (weights 4.4 GB + KV cache 1.6 GB + 1 GB runtime overhead), which fits within 12 GB. Decode at Q4/8K: ≈ 43.6 tok/s (estimated, batch 1). FP16 needs ≈ 18.6 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. Buy Titan Xp 12GB on Amazon →

Fit & speed by quant and context

Quant	Context	VRAM needed	Fits?	tok/s (decode)
Q4	4K	6.2 GB	Yes	43.6 ± est.
Q4	8K default	7.0 GB	Yes	43.6 ± est.
Q4	32K	11.8 GB	Yes	43.6 ± est.
FP16	4K	17.8 GB	No	15.5 ± est.
FP16	8K default	18.6 GB	No	14.2 ± est.
FP16	32K	23.4 GB	No	9.0 ± est.

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).

VRAM breakdown at 8K context

Quant	Weights	KV cache	Overhead	Total needed	Titan Xp 12GB VRAM
Q4	4.4 GB	1.6 GB	1 GB	7.0 GB	12 GB
FP16	16.0 GB	1.6 GB	1 GB	18.6 GB	12 GB

Other GPUs that run Llama-3.1-8B-Instruct

• B200 192GB SXM — ≈636.4 tok/s Q4 est.
• MI300X 192GB — ≈421.6 tok/s Q4 est.
• H200 141GB SXM5 — ≈381.8 tok/s Q4 est.
• H100 80GB SXM5 — ≈266.5 tok/s Q4 est.
• Gaudi 3 128GB — ≈260.6 tok/s Q4 est.
• RTX 5090 32GB — ≈214.3 tok/s Q4 measured
• A100 80GB SXM4 — ≈162.2 tok/s Q4 est.
• RTX 4090 24GB — ≈145.0 tok/s Q4 measured

All GPUs for Llama-3.1-8B-Instruct →

Other models for the Titan Xp 12GB

• MiniCPM5-1B — ≈322.9 tok/s Q4 est.
• Qwen3.5-2B — ≈174.4 tok/s Q4 est.
• DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx — ≈151.6 tok/s Q4 est.
• Llama-3.2-3B-Instruct — ≈109.0 tok/s Q4 est.
• Qwen3-4B-Instruct-2507 — ≈87.2 tok/s Q4 est.
• NVIDIA-Nemotron-3-Nano-4B-BF16 — ≈87.2 tok/s Q4 est.
• Qwen3-4B-Thinking-2507 — ≈87.2 tok/s Q4 est.
• gemma-4-E2B-it — ≈68.4 tok/s Q4 est.

All models on the Titan Xp 12GB →