Question 1

Is the Arc B580 12GB or the Titan Xp 12GB better for local LLMs?

Accepted Answer

The Titan Xp 12GB has about 20% more memory bandwidth (548 vs 456 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 20% faster on the Titan Xp 12GB. Both fit the same number of catalog models at Q4/8K (18 of 69; 12 vs 12 GB VRAM). MSRP is $249 for the Arc B580 12GB vs $1,200 for the Titan Xp 12GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price.

Question 2

How much faster is the Arc B580 12GB than the Titan Xp 12GB for LLM inference?

Accepted Answer

On memory bandwidth the Titan Xp 12GB leads by about 20% (548 vs 456 GB/s), and batch-1 decode tracks bandwidth. In the Q4/8K head-to-head on this page, the Arc B580 12GB wins 0 of 41 shared model rows and the Titan Xp 12GB wins 41.

Question 3

Which can run larger models, the Arc B580 12GB or the Titan Xp 12GB?

Accepted Answer

Neither — both fit 18 of 69 catalog models at Q4/8K (12 vs 12 GB VRAM).

	Arc B580 12GB	Titan Xp 12GB
Vendor	Intel	NVIDIA
VRAM	12 GB	12 GB
Memory type	GDDR6	GDDR5X
Memory bandwidth	456 GB/s	548 GB/s
TDP	190 W	250 W
MSRP (list)	$249	$1,200
Buy	Search Amazon (affiliate)	Search Amazon (affiliate)

Model	Params (B)	Arc B580 12GB tok/s	Arc B580 12GB fits	Titan Xp 12GB tok/s	Titan Xp 12GB fits	Winner
MiniCPM5-1B	1.08	268.7 est.	Yes	322.9 est.	Yes	Titan Xp 12GB
gpt-oss-20b	21.5	179.9 est.	No	216.2 est.	No	Titan Xp 12GB
Qwen3.5-2B	2.0	145.1 est.	Yes	174.4 est.	Yes	Titan Xp 12GB
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16	30.0	129.0 est.	No	155.0 est.	No	Titan Xp 12GB
gemma-4-26B-A4B-it	25.2	128.2 est.	No	154.1 est.	No	Titan Xp 12GB
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx	2.3	126.2 est.	Yes	151.6 est.	Yes	Titan Xp 12GB
Qwen3-30B-A3B-Instruct-2507	30.5	117.3 est.	No	141.0 est.	No	Titan Xp 12GB
GLM-4.7-Flash	31.2	112.6 est.	No	135.3 est.	No	Titan Xp 12GB
Qwen3.5-35B-A3B	34.7	97.5 est.	No	117.2 est.	No	Titan Xp 12GB
qwen35b-a3b-fable-sft-abliterated	34.7	92.6 est.	No	111.3 est.	No	Titan Xp 12GB
Ornith-1.0-35B	35.0	91.2 est.	No	109.6 est.	No	Titan Xp 12GB
Qwen3.6-35B-A3B	36.0	90.9 est.	No	109.2 est.	No	Titan Xp 12GB
Llama-3.2-3B-Instruct	3.2	47.4 measured	Yes	109.0 est.	Yes	Titan Xp 12GB
Qwen3-4B-Instruct-2507	4.0	72.5 est.	Yes	87.2 est.	Yes	Titan Xp 12GB
NVIDIA-Nemotron-3-Nano-4B-BF16	4.0	72.5 est.	Yes	87.2 est.	Yes	Titan Xp 12GB

Arc B580 12GB vs Titan Xp 12GB for Local LLMs

Spec comparison

Q4 / 8K head-to-head — top 15 of 41 shared models

Fit coverage at Q4 / 8K

	Arc B580 12GB	Titan Xp 12GB
Catalog models that fit	18 of 69	18 of 69
Largest exclusive fit	—	—