Ryzen AI Max 390 64GB vs T4 16GB for Local LLMs

The T4 16GB has about 49% more memory bandwidth (320 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 49% faster on the T4 16GB. The Ryzen AI Max 390 64GB fits more of the catalog at Q4/8K — 41 vs 24 of 69 models (48 vs 16 GB VRAM). Largest model that fits the Ryzen AI Max 390 64GB but not the T4 16GB: Qwen3-Next-80B-A3B-Instruct (81.3B). MSRP is $1,300 for the Ryzen AI Max 390 64GB vs $2,000 for the T4 16GB. 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 T4 16GB posts the higher tok/s in 39 rows vs 5. Methodology.

Spec comparison

	Ryzen AI Max 390 64GB	T4 16GB
Vendor	AMD	NVIDIA
VRAM	48 GB	16 GB
Memory type	LPDDR5X	GDDR6
Memory bandwidth	215 GB/s	320 GB/s
TDP	120 W	70 W
MSRP (list)	$1,300	$2,000
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)	Ryzen AI Max 390 64GB tok/s	Ryzen AI Max 390 64GB fits	T4 16GB tok/s	T4 16GB fits	Winner
MiniCPM5-1B	1.08	126.7 est.	Yes	188.6 est.	Yes	T4 16GB
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16	30.0	45.6 est.	Yes	161.1 est.	No	T4 16GB
Qwen3-30B-A3B-Instruct-2507	30.5	45.6 est.	Yes	146.5 est.	No	T4 16GB
GLM-4.7-Flash	31.2	45.6 est.	Yes	140.6 est.	No	T4 16GB
Qwen3.5-35B-A3B	34.7	45.6 est.	Yes	121.8 est.	No	T4 16GB
qwen35b-a3b-fable-sft-abliterated	34.7	45.6 est.	Yes	115.6 est.	No	T4 16GB
Ornith-1.0-35B	35.0	45.6 est.	Yes	113.9 est.	No	T4 16GB
Qwen3.6-35B-A3B	36.0	45.6 est.	Yes	113.5 est.	No	T4 16GB
Qwen3.5-2B	2.0	68.4 est.	Yes	101.8 est.	Yes	T4 16GB
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx	2.3	59.5 est.	Yes	88.5 est.	Yes	T4 16GB
Llama-3.2-3B-Instruct	3.2	42.8 est.	Yes	63.6 est.	Yes	T4 16GB
gpt-oss-20b	21.5	38.0 est.	Yes	56.6 est.	Yes	T4 16GB
gemma-4-26B-A4B-it	25.2	36.0 est.	Yes	53.6 est.	Yes	T4 16GB
Qwen3-4B-Instruct-2507	4.0	34.2 est.	Yes	50.9 est.	Yes	T4 16GB
NVIDIA-Nemotron-3-Nano-4B-BF16	4.0	34.2 est.	Yes	50.9 est.	Yes	T4 16GB

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	T4 16GB
Catalog models that fit	41 of 69	24 of 69
Largest exclusive fit	Qwen3-Next-80B-A3B-Instruct (81.3B)	—

Ryzen AI Max 390 64GB details → · T4 16GB details →