A100 80GB SXM4 vs Ryzen AI Max 390 64GB for Local LLMs
The A100 80GB SXM4 has about 848% more memory bandwidth (2,039 vs 215 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 848% faster on the A100 80GB SXM4. The A100 80GB SXM4 fits more of the catalog at Q4/8K — 50 vs 41 of 69 models (80 vs 48 GB VRAM). Largest model that fits the A100 80GB SXM4 but not the Ryzen AI Max 390 64GB: Qwen3.5-122B-A10B (122.0B). MSRP is $15,000 for the A100 80GB SXM4 vs $1,300 for the Ryzen AI Max 390 64GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: A100 80GB SXM4 (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (57 shared models), the A100 80GB SXM4 posts the higher tok/s in 57 rows vs 0. Methodology.