B200 192GB SXM vs DGX Spark (GH200 480GB) for Local LLMs
The B200 192GB SXM has about 1500% more memory bandwidth (8,000 vs 500 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 1500% faster on the B200 192GB SXM. The DGX Spark (GH200 480GB) fits more of the catalog at Q4/8K — 66 vs 57 of 69 models (480 vs 192 GB VRAM). Largest model that fits the DGX Spark (GH200 480GB) but not the B200 192GB SXM: DeepSeek-V4-Pro (861.6B). MSRP is $40,000 for the B200 192GB SXM vs $3,000 for the DGX Spark (GH200 480GB). MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: B200 192GB SXM (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (69 shared models), the B200 192GB SXM posts the higher tok/s in 69 rows vs 0. Methodology.