Source for that?
Edit: @kieranmaine thanks! Wonder how long they have to wait to turn them on again.
FTA:
> The cooling system will only be able to operate in brief spurts of about 15 minutes. After that, the TPUs need to shut down to allow the radiators to catch up.
alt Hacker News
FTA:
> The cooling system will only be able to operate in brief spurts of about 15 minutes. After that, the TPUs need to shut down to allow the radiators to catch up.