A100 80GB SXM4 vs DGX Spark (GH200 480GB) for Local LLMs
The A100 80GB SXM4 has about 308% more memory bandwidth (2,039 vs 500 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 308% faster on the A100 80GB SXM4. The DGX Spark (GH200 480GB) fits more of the catalog at Q4/8K — 66 vs 50 of 69 models (480 vs 80 GB VRAM). Largest model that fits the DGX Spark (GH200 480GB) but not the A100 80GB SXM4: DeepSeek-V4-Pro (861.6B). MSRP is $15,000 for the A100 80GB SXM4 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: A100 80GB SXM4 (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (62 shared models), the A100 80GB SXM4 posts the higher tok/s in 59 rows vs 2. Methodology.