The short version
- An NPU (neural processing unit) is a small part of the processor built only for AI work.
- TOPS means trillions of operations per second. It's the NPU's top speed on paper.
- Windows needs an NPU of 40+ TOPS for its "Copilot+ PC" AI features.
- For gaming, the NPU barely matters today. The graphics chip still does the heavy lifting.
What an NPU actually does
Laptop chips now have three kinds of brains on one piece of silicon. The CPU runs Windows and your apps. The GPU draws graphics. The NPU does one job: the maths behind AI features, using very little power.
That's why it exists. Background blur on a video call, live captions or Windows' AI search could run on the GPU, but they'd drain the battery. The NPU handles them quietly in the background.
What TOPS measures
TOPS counts how many simple maths operations the chip can do in a second, in trillions. It's a peak figure, the best case, not what you'll see in every app. It's a cousin of the TFLOPS number used for consoles, but it usually counts simpler, lower-precision maths.
Here's where current laptop chips sit, by their makers' figures:
Two Snapdragon X2 Elite models go up to 85.
Why the biggest number can mislead
Brands often quote a total TOPS that adds the CPU, GPU and NPU together. AMD says the Ryzen AI Max+ 395 reaches up to 126 TOPS in total, but its NPU alone is 50. Intel's Lunar Lake GPU is rated at 59 TOPS, more than its NPU.
Precision matters too. Nvidia quotes its new RTX Spark chip at up to 1 petaflop, but that's measured at FP4, an even simpler kind of maths than the INT8 most NPU figures use. You can't line those numbers up directly.
The Copilot+ PC line
Microsoft's bar for its Copilot+ AI features is an NPU that can do 40+ TOPS, plus 16GB of RAM and 256GB of storage. Chips that qualify include AMD Ryzen AI 300 and 400, Intel Core Ultra 200V and 300V, and Snapdragon X.
What to check: on a spec sheet, look for the NPU figure on its own, not the total. If you mainly game, the GPU listing still tells you more.
Image: Qualcomm. Diagrams: Zerocade.
