A cloud tenant could rattle the power grid with nothing but a rented GPU, researchers say

AI data centres already strain the grid just by running. A new paper asks a darker question: what if a tenant tried to break it on purpose?

Three researchers at Zhejiang University set out the idea in a preprint called Bit2Watt, accepted to a leading hardware-security conference. As The Register reported, it imagines a paying customer as the attacker.

How it works

The trick rests on a simple fact. A GPU’s power draw follows whatever it is computing. Load it hard and the current spikes. Let it idle and the current drops.

Flip between those states on a schedule and you get a controllable power wobble at the wall socket. The researchers pushed it past 6,000 times a second, far faster than the gentle sway of a household load like an air conditioner.

They show two ways to do it. One uses a purpose-built workload that a provider might learn...

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