https://arstechnica.com/gadgets/2018/09/nvidia-makes-gpu-overclocking-a-lot-smarter-with-scanner/

Nvidia's new 20-series video cards, due to ship next week, will introduce a new overclocking system: Scanner.

Overclocking is typically a trial-and-error process: increase the clock speed, run some intensive workloads to make sure everything works OK, maybe fiddle with the GPU voltage to eke out a bit more stability. Push the clock speed too high, and the system stands a good chance of locking up and crashing. This means that finding the optimal settings can cause lots of rebooting and adjustment. Verifying that the GPU really is stable at a given speed is also a challenge, as not all workloads use all parts of the chip. A given clock speed might be fine for some kinds of software but not others.