Ryzen AI Max+ 395 128GB vs RTX 3090 24GB for Local LLMs
The RTX 3090 24GB has about 335% more memory bandwidth (936 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 335% faster on the RTX 3090 24GB. The Ryzen AI Max+ 395 128GB fits more of the catalog at Q4/8K — 51 vs 35 of 69 models (96 vs 24 GB VRAM). Largest model that fits the Ryzen AI Max+ 395 128GB but not the RTX 3090 24GB: DeepSeek-V4-Flash (158.1B). MSRP is $2,000 for the Ryzen AI Max+ 395 128GB vs $1,499 for the RTX 3090 24GB. 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 (51 shared models), the RTX 3090 24GB posts the higher tok/s in 50 rows vs 1. Methodology.