Ryzen AI Max 390 64GB vs RTX 4070 Ti 12GB for Local LLMs

The RTX 4070 Ti 12GB has about 158% more memory bandwidth (554 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 158% faster on the RTX 4070 Ti 12GB. The Ryzen AI Max 390 64GB fits more of the catalog at Q4/8K — 41 vs 18 of 69 models (48 vs 12 GB VRAM). Largest model that fits the Ryzen AI Max 390 64GB but not the RTX 4070 Ti 12GB: Qwen3-Next-80B-A3B-Instruct (81.3B). MSRP is $1,300 for the Ryzen AI Max 390 64GB vs $799 for the RTX 4070 Ti 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 Ti 12GB posts the higher tok/s in 39 rows vs 2. Methodology.

Spec comparison

	Ryzen AI Max 390 64GB	RTX 4070 Ti 12GB
Vendor	AMD	NVIDIA
VRAM	48 GB	12 GB
Memory type	LPDDR5X	GDDR6X
Memory bandwidth	215 GB/s	554 GB/s
TDP	120 W	285 W
MSRP (list)	$1,300	$799
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 41 shared models

Model	Params (B)	Ryzen AI Max 390 64GB tok/s	Ryzen AI Max 390 64GB fits	RTX 4070 Ti 12GB tok/s	RTX 4070 Ti 12GB fits	Winner
MiniCPM5-1B	1.08	126.7 est.	Yes	326.4 est.	Yes	RTX 4070 Ti 12GB
Qwen3.5-2B	2.0	68.4 est.	Yes	176.3 est.	Yes	RTX 4070 Ti 12GB
gpt-oss-20b	21.5	38.0 est.	Yes	163.1 measured	No	RTX 4070 Ti 12GB
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16	30.0	45.6 est.	Yes	156.7 est.	No	RTX 4070 Ti 12GB
gemma-4-26B-A4B-it	25.2	36.0 est.	Yes	155.8 est.	No	RTX 4070 Ti 12GB
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx	2.3	59.5 est.	Yes	153.3 est.	Yes	RTX 4070 Ti 12GB
Qwen3-30B-A3B-Instruct-2507	30.5	45.6 est.	Yes	142.5 est.	No	RTX 4070 Ti 12GB
GLM-4.7-Flash	31.2	45.6 est.	Yes	136.8 est.	No	RTX 4070 Ti 12GB
Qwen3.5-35B-A3B	34.7	45.6 est.	Yes	118.5 est.	No	RTX 4070 Ti 12GB
qwen35b-a3b-fable-sft-abliterated	34.7	45.6 est.	Yes	112.5 est.	No	RTX 4070 Ti 12GB
Ornith-1.0-35B	35.0	45.6 est.	Yes	110.8 est.	No	RTX 4070 Ti 12GB
Qwen3.6-35B-A3B	36.0	45.6 est.	Yes	110.4 est.	No	RTX 4070 Ti 12GB
Llama-3.2-3B-Instruct	3.2	42.8 est.	Yes	110.2 est.	Yes	RTX 4070 Ti 12GB
Qwen3-4B-Instruct-2507	4.0	34.2 est.	Yes	88.1 est.	Yes	RTX 4070 Ti 12GB
NVIDIA-Nemotron-3-Nano-4B-BF16	4.0	34.2 est.	Yes	88.1 est.	Yes	RTX 4070 Ti 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 390 64GB	RTX 4070 Ti 12GB
Catalog models that fit	41 of 69	18 of 69
Largest exclusive fit	Qwen3-Next-80B-A3B-Instruct (81.3B)	—

Ryzen AI Max 390 64GB details → · RTX 4070 Ti 12GB details →