Ryzen AI Max+ 395 128GB vs RTX 4070 12GB for Local LLMs

The RTX 4070 12GB has about 134% more memory bandwidth (504 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 134% faster on the RTX 4070 12GB. The Ryzen AI Max+ 395 128GB fits more of the catalog at Q4/8K — 51 vs 18 of 69 models (96 vs 12 GB VRAM). Largest model that fits the Ryzen AI Max+ 395 128GB but not the RTX 4070 12GB: DeepSeek-V4-Flash (158.1B). MSRP is $2,000 for the Ryzen AI Max+ 395 128GB vs $599 for the RTX 4070 12GB. 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 (41 shared models), the RTX 4070 12GB posts the higher tok/s in 39 rows vs 2. Methodology.

Spec comparison

	Ryzen AI Max+ 395 128GB	RTX 4070 12GB
Vendor	AMD	NVIDIA
VRAM	96 GB	12 GB
Memory type	LPDDR5X	GDDR6X
Memory bandwidth	215 GB/s	504 GB/s
TDP	120 W	200 W
MSRP (list)	$2,000	$599
Buy	Search Amazon (affiliate)	ASUS Dual GeForce RTX 4070 OC 12GB (affiliate) · More listings

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 41 shared models

Model	Params (B)	Ryzen AI Max+ 395 128GB tok/s	Ryzen AI Max+ 395 128GB fits	RTX 4070 12GB tok/s	RTX 4070 12GB fits	Winner
MiniCPM5-1B	1.08	126.7 est.	Yes	297.0 est.	Yes	RTX 4070 12GB
gpt-oss-20b	21.5	38.0 est.	Yes	198.8 est.	No	RTX 4070 12GB
Llama-3.2-3B-Instruct	3.2	42.8 est.	Yes	160.7 measured	Yes	RTX 4070 12GB
Qwen3.5-2B	2.0	68.4 est.	Yes	160.4 est.	Yes	RTX 4070 12GB
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16	30.0	45.6 est.	Yes	142.5 est.	No	RTX 4070 12GB
gemma-4-26B-A4B-it	25.2	36.0 est.	Yes	141.7 est.	No	RTX 4070 12GB
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx	2.3	59.5 est.	Yes	139.4 est.	Yes	RTX 4070 12GB
Qwen3-30B-A3B-Instruct-2507	30.5	45.6 est.	Yes	129.7 est.	No	RTX 4070 12GB
GLM-4.7-Flash	31.2	45.6 est.	Yes	124.5 est.	No	RTX 4070 12GB
Qwen3.5-35B-A3B	34.7	45.6 est.	Yes	107.8 est.	No	RTX 4070 12GB
qwen35b-a3b-fable-sft-abliterated	34.7	45.6 est.	Yes	102.3 est.	No	RTX 4070 12GB
Ornith-1.0-35B	35.0	45.6 est.	Yes	100.8 est.	No	RTX 4070 12GB
Qwen3.6-35B-A3B	36.0	45.6 est.	Yes	100.5 est.	No	RTX 4070 12GB
Qwen3-4B-Instruct-2507	4.0	34.2 est.	Yes	80.2 est.	Yes	RTX 4070 12GB
NVIDIA-Nemotron-3-Nano-4B-BF16	4.0	34.2 est.	Yes	80.2 est.	Yes	RTX 4070 12GB

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

	Ryzen AI Max+ 395 128GB	RTX 4070 12GB
Catalog models that fit	51 of 69	18 of 69
Largest exclusive fit	DeepSeek-V4-Flash (158.1B)	—

Ryzen AI Max+ 395 128GB details → · RTX 4070 12GB details →