With lemon flavored LN2
Of course it wasn't lemon flavored, or maybe it even was but nobody had the guts to try it – the important thing is that Phenom II X6 1090T BE managed to break a previous 6-core overclocking record.
The CPU ran on 890FX-based Asus Crosshair IV Formula and used LN2 cooling to hit 6.8GHz, which is a pretty mean feat.
You can find the record with some screenshots here.
