The A100 80GB SXM4 has about 14% more memory bandwidth (2,039 vs 1,792 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 14% faster on the A100 80GB SXM4. The A100 80GB SXM4 fits more of the catalog at Q4/8K — 46 vs 38 of 61 models (80 vs 32 GB VRAM). Largest model that fits the A100 80GB SXM4 but not the RTX 5090 32GB: gpt-oss-120b (120.4B). MSRP is $15,000 for the A100 80GB SXM4 vs $1,999 for the RTX 5090 32GB. 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 (47 shared models), the A100 80GB SXM4 posts the higher tok/s in 40 rows vs 7. Methodology.