Arc A770 16GB vs Mac Studio M2 Ultra 192GB for Local LLMs

The Mac Studio M2 Ultra 192GB has about 43% more memory bandwidth (800 vs 560 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 43% faster on the Mac Studio M2 Ultra 192GB. The Mac Studio M2 Ultra 192GB fits more of the catalog at Q4/8K — 50 vs 25 of 61 models (192 vs 16 GB VRAM). Largest model that fits the Mac Studio M2 Ultra 192GB but not the Arc A770 16GB: Qwen3-235B-A22B (235.1B). MSRP is $349 for the Arc A770 16GB vs $6,999 for the Mac Studio M2 Ultra 192GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. In the Q4/8K head-to-head below (44 shared models), the Mac Studio M2 Ultra 192GB posts the higher tok/s in 35 rows vs 9. Methodology.

Spec comparison

	Arc A770 16GB	Mac Studio M2 Ultra 192GB
Vendor	Intel	Apple
VRAM	16 GB	192 GB
Memory type	GDDR6	LPDDR5
Memory bandwidth	560 GB/s	800 GB/s
TDP	225 W	370 W
MSRP (list)	$349	$6,999
Buy	Search Amazon (affiliate)	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 44 shared models

Model	Params (B)	Arc A770 16GB tok/s	Arc A770 16GB fits	Mac Studio M2 Ultra 192GB tok/s	Mac Studio M2 Ultra 192GB fits	Winner
Qwen3-0.6B	0.8	445.5 est.	Yes	636.4 est.	Yes	Mac Studio M2 Ultra 192GB
gemma-3-1b-it	1.0	356.4 est.	Yes	509.1 est.	Yes	Mac Studio M2 Ultra 192GB
Llama-3.2-1B-Instruct	1.2	297.0 est.	Yes	424.2 est.	Yes	Mac Studio M2 Ultra 192GB
Qwen3-30B-A3B	30.5	257.2 est.	No	169.7 est.	Yes	Arc A770 16GB
Qwen3-Coder-30B-A3B-Instruct	30.5	257.2 est.	No	169.7 est.	Yes	Arc A770 16GB
Qwen3-30B-A3B-Instruct-2507	30.5	257.2 est.	No	169.7 est.	Yes	Arc A770 16GB
Qwen3-1.7B	2.0	178.2 est.	Yes	254.5 est.	Yes	Mac Studio M2 Ultra 192GB
GLM-4.7-Flash	31.2	246.9 est.	No	169.7 est.	Yes	Arc A770 16GB
Qwen3-Next-80B-A3B-Instruct	81.3	40.5 est.	No	169.7 est.	Yes	Mac Studio M2 Ultra 192GB
Qwen3-Coder-Next	79.7	42.1 est.	No	169.7 est.	Yes	Mac Studio M2 Ultra 192GB
Llama-3.2-3B-Instruct	3.2	111.4 est.	Yes	159.1 est.	Yes	Mac Studio M2 Ultra 192GB
Phi-4-mini-instruct	3.8	93.8 est.	Yes	134.0 est.	Yes	Mac Studio M2 Ultra 192GB
Phi-4-mini-reasoning	3.8	93.8 est.	Yes	134.0 est.	Yes	Mac Studio M2 Ultra 192GB
gemma-3-4b-it	4.3	91.4 est.	Yes	130.5 est.	Yes	Mac Studio M2 Ultra 192GB
Qwen3-4B-Instruct-2507	4.0	89.1 est.	Yes	127.3 est.	Yes	Mac Studio M2 Ultra 192GB

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 A770 16GB	Mac Studio M2 Ultra 192GB
Catalog models that fit	25 of 61	50 of 61
Largest exclusive fit	—	Qwen3-235B-A22B (235.1B)

Arc A770 16GB details → · Mac Studio M2 Ultra 192GB details →