The A100 80GB SXM4 has about 155% more memory bandwidth (2,039 vs 800 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 155% faster on the A100 80GB SXM4. The A100 80GB SXM4 fits more of the catalog at Q4/8K — 46 vs 32 of 61 models (80 vs 20 GB VRAM). Largest model that fits the A100 80GB SXM4 but not the RX 7900 XT 20GB: gpt-oss-120b (120.4B). MSRP is $15,000 for the A100 80GB SXM4 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. 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 (46 shared models), the A100 80GB SXM4 posts the higher tok/s in 46 rows vs 0. Methodology.