Arc B580 12GB vs B200 192GB SXM for Local LLMs

The B200 192GB SXM has about 1654% more memory bandwidth (8,000 vs 456 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 1654% faster on the B200 192GB SXM. The B200 192GB SXM fits more of the catalog at Q4/8K — 50 vs 18 of 61 models (192 vs 12 GB VRAM). Largest model that fits the B200 192GB SXM but not the Arc B580 12GB: Qwen3-235B-A22B (235.1B). MSRP is $249 for the Arc B580 12GB vs $40,000 for the B200 192GB SXM. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: B200 192GB SXM (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (40 shared models), the B200 192GB SXM posts the higher tok/s in 40 rows vs 0. Methodology.

Spec comparison

	Arc B580 12GB	B200 192GB SXM
Vendor	Intel	NVIDIA
VRAM	12 GB	192 GB
Memory type	GDDR6	HBM3e
Memory bandwidth	456 GB/s	8,000 GB/s
TDP	190 W	1000 W
MSRP (list)	$249	$40,000
Buy	Search Amazon (affiliate)	—

MSRP is the launch list price, not live retail. Buy links are Amazon affiliate links — the price after you click is the live price.

Q4 / 8K head-to-head — top 15 of 40 shared models

Model	Params (B)	Arc B580 12GB tok/s	Arc B580 12GB fits	B200 192GB SXM tok/s	B200 192GB SXM fits	Winner
gemma-3-1b-it	1.0	290.2 est.	Yes	5000 est.	Yes	B200 192GB SXM
Qwen3-0.6B	0.8	362.7 est.	Yes	5000 est.	Yes	B200 192GB SXM
Llama-3.2-1B-Instruct	1.2	241.8 est.	Yes	4242.4 est.	Yes	B200 192GB SXM
Qwen3-1.7B	2.0	145.1 est.	Yes	2545.5 est.	Yes	B200 192GB SXM
Qwen3-30B-A3B	30.5	117.8 est.	No	1697.0 est.	Yes	B200 192GB SXM
Qwen3-Coder-30B-A3B-Instruct	30.5	117.8 est.	No	1697.0 est.	Yes	B200 192GB SXM
GLM-4.7-Flash	31.2	113.1 est.	No	1697.0 est.	Yes	B200 192GB SXM
Qwen3-30B-A3B-Instruct-2507	30.5	117.8 est.	No	1697.0 est.	Yes	B200 192GB SXM
Qwen3-Next-80B-A3B-Instruct	81.3	18.5 est.	No	1697.0 est.	Yes	B200 192GB SXM
Qwen3-Coder-Next	79.7	19.3 est.	No	1697.0 est.	Yes	B200 192GB SXM
Llama-3.2-3B-Instruct	3.2	47.4 measured	Yes	1590.9 est.	Yes	B200 192GB SXM
gpt-oss-20b	21.5	180.6 est.	No	1414.1 est.	Yes	B200 192GB SXM
Phi-4-mini-instruct	3.8	76.4 est.	Yes	1339.7 est.	Yes	B200 192GB SXM
Phi-4-mini-reasoning	3.8	76.4 est.	Yes	1339.7 est.	Yes	B200 192GB SXM
gemma-3-4b-it	4.3	74.4 est.	Yes	1305.4 est.	Yes	B200 192GB SXM

est. = bandwidth-based estimate; measured = curated real benchmark that overrides the estimate. Fits = weights + KV(8K) + 1 GB overhead ≤ 95% of VRAM.

Fit coverage at Q4 / 8K

	Arc B580 12GB	B200 192GB SXM
Catalog models that fit	18 of 61	50 of 61
Largest exclusive fit	—	Qwen3-235B-A22B (235.1B)

Arc B580 12GB details → · B200 192GB SXM details →