Temperature inversion

Article: What Do Overclockers and Supercomputers Have in Common?
By: Jonathan Kang (johnbk.delete@this.gmail.com), June 22, 2011 5:43 pm
Room: Moderated Discussions
One thing to note is that around 45nm and below, a temperature inversion effect occurs where going below 0C (peak performance is actually around ~15C or so) actually increases circuit delay.

In fact, at 28nm, gate-delay is worse at -30C than it is at 125C.

This is due to the dominance of surface inversion effects -- which raises threshold voltage -- at low-drain currents, which happens to correlate with smaller feature sizes.
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