The MI300X 192GB has about 590% more memory bandwidth (5,300 vs 768 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 590% faster on the MI300X 192GB. The MI300X 192GB fits more of the catalog at Q4/8K — 50 vs 39 of 61 models (192 vs 48 GB VRAM). Largest model that fits the MI300X 192GB but not the RTX A6000 48GB: Qwen3-235B-A22B (235.1B). MSRP is $4,500 for the RTX A6000 48GB vs $15,000 for the MI300X 192GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: MI300X 192GB (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (50 shared models), the MI300X 192GB posts the higher tok/s in 50 rows vs 0. Methodology.