TOPS
Tera-Operations Per Second — a marketing-friendly metric for AI accelerator throughput. Higher is better, but the operation precision (INT8, FP16, FP4) and sparsity assumptions matter as much as the number.
TOPS measures how many AI operations a chip can execute per second. Vendors quote it for NPUs, GPUs, and SoCs.
The asterisks
- Precision. 40 TOPS at INT8 ≠ 40 TOPS at FP16. Lower precision yields more TOPS.
- Sparsity. "Sparsity-on" doubles theoretical TOPS by skipping zero weights, but real models rarely hit theoretical sparsity.
- Sustained vs peak. Most quoted figures are peak; sustained throughput under thermal limits is lower.
Why it matters in 2026
Windows Copilot+ PCs require an NPU with ≥40 TOPS for on-device Copilot features. Apple Neural Engine sits around 35 TOPS. NVIDIA's mobile RTX dwarfs both — 200+ TOPS — but at much higher power.
For LLM inference, total memory bandwidth often bottlenecks before TOPS does.
How to use TOPS in a real comparison
Tera-Operations Per Second — a marketing-friendly metric for AI accelerator throughput. Higher is better, but the operation precision (INT8, FP16, FP4) and sparsity assumptions matter as much as the number. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
Open a product page and check the stated value, configuration, price, and related trade-offs before treating this term as decisive. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.