Ryzen AI Max+ 395 128GB vs RX 7900 XT 20GB for Local LLMs
The RX 7900 XT 20GB has about 272% more memory bandwidth (800 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 272% faster on the RX 7900 XT 20GB. The Ryzen AI Max+ 395 128GB fits more of the catalog at Q4/8K — 51 vs 30 of 69 models (96 vs 20 GB VRAM). Largest model that fits the Ryzen AI Max+ 395 128GB but not the RX 7900 XT 20GB: DeepSeek-V4-Flash (158.1B). MSRP is $2,000 for the Ryzen AI Max+ 395 128GB vs $899 for the RX 7900 XT 20GB. 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 RX 7900 XT 20GB posts the higher tok/s in 46 rows vs 4. Methodology.