Mac Studio M2 Ultra 192GB vs RTX 6000 Ada 48GB for Local LLMs

The RTX 6000 Ada 48GB has about 20% more memory bandwidth (960 vs 800 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 20% faster on the RTX 6000 Ada 48GB. The Mac Studio M2 Ultra 192GB fits more of the catalog at Q4/8K — 50 vs 39 of 61 models (192 vs 48 GB VRAM). Largest model that fits the Mac Studio M2 Ultra 192GB but not the RTX 6000 Ada 48GB: Qwen3-235B-A22B (235.1B). MSRP is $6,999 for the Mac Studio M2 Ultra 192GB vs $6,800 for the RTX 6000 Ada 48GB. 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 (50 shared models), the RTX 6000 Ada 48GB posts the higher tok/s in 46 rows vs 4. Methodology.

Spec comparison

	Mac Studio M2 Ultra 192GB	RTX 6000 Ada 48GB
Vendor	Apple	NVIDIA
VRAM	192 GB	48 GB
Memory type	LPDDR5	GDDR6
Memory bandwidth	800 GB/s	960 GB/s
TDP	370 W	300 W
MSRP (list)	$6,999	$6,800
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 50 shared models

Model	Params (B)	Mac Studio M2 Ultra 192GB tok/s	Mac Studio M2 Ultra 192GB fits	RTX 6000 Ada 48GB tok/s	RTX 6000 Ada 48GB fits	Winner
Qwen3-0.6B	0.8	636.4 est.	Yes	763.6 est.	Yes	RTX 6000 Ada 48GB
Qwen3-Next-80B-A3B-Instruct	81.3	169.7 est.	Yes	624.8 est.	No	RTX 6000 Ada 48GB
gemma-3-1b-it	1.0	509.1 est.	Yes	610.9 est.	Yes	RTX 6000 Ada 48GB
Llama-3.2-1B-Instruct	1.2	424.2 est.	Yes	509.1 est.	Yes	RTX 6000 Ada 48GB
Qwen3-1.7B	2.0	254.5 est.	Yes	305.5 est.	Yes	RTX 6000 Ada 48GB
Qwen3-30B-A3B	30.5	169.7 est.	Yes	203.6 est.	Yes	RTX 6000 Ada 48GB
Qwen3-Coder-30B-A3B-Instruct	30.5	169.7 est.	Yes	203.6 est.	Yes	RTX 6000 Ada 48GB
GLM-4.7-Flash	31.2	169.7 est.	Yes	203.6 est.	Yes	RTX 6000 Ada 48GB
Qwen3-30B-A3B-Instruct-2507	30.5	169.7 est.	Yes	203.6 est.	Yes	RTX 6000 Ada 48GB
Qwen3-Coder-Next	79.7	169.7 est.	Yes	203.6 est.	Yes	RTX 6000 Ada 48GB
Llama-3.2-3B-Instruct	3.2	159.1 est.	Yes	190.9 est.	Yes	RTX 6000 Ada 48GB
gpt-oss-20b	21.5	116.1 measured	Yes	169.7 est.	Yes	RTX 6000 Ada 48GB
gpt-oss-120b	120.4	79.7 measured	Yes	169.3 est.	No	RTX 6000 Ada 48GB
Mistral-7B-Instruct-v0.3	7.2	70.7 est.	Yes	166.6 measured	Yes	RTX 6000 Ada 48GB
Phi-4-mini-instruct	3.8	134.0 est.	Yes	160.8 est.	Yes	RTX 6000 Ada 48GB

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

	Mac Studio M2 Ultra 192GB	RTX 6000 Ada 48GB
Catalog models that fit	50 of 61	39 of 61
Largest exclusive fit	Qwen3-235B-A22B (235.1B)	—

Mac Studio M2 Ultra 192GB details → · RTX 6000 Ada 48GB details →