An NPU, a neural processing unit, trades exact math for AI work on less power.
By Tony Yu / tkal · November 4, 2026 · One-minute visual guide
A scoop, not a scale~
An AI task ♡
↓
Precise mathnot what NPUs are built for
vs
8-bit or lowersimpler math, better energy use
Rough-enough math is the trade an NPU makes.
A simplified picture: the scoop is Mochi’s analogy, and the chip details come from IBM.
Keep this bitAn NPU is a neural processing unit: a chip tailored to accelerate AI tasks and workloads.
Why care?
Only if your AI runs on your device. There, IBM says it reduces latency, mitigates energy consumption and bolsters privacy. One everyday job: better background blur on video calls.
The limitation
IBM says testing has shown some NPU performance over 100 times better than a comparable GPU, on the same power. That is some NPUs in some tests, not every chip. And it’s not only laptops now: per Digitimes, Ceva just took its NeuPro NPUs into AI infrastructure for the first time.
Precise math
8-bit or lower