669,60 EUR was 709,– EUR
ASUS WS C621E SAGE
LGA 3647, Intel C621, SSI EEB
ASUS WS C621E SAGE
LGA 3647, Intel C621, SSI EEB
Seems to be about the only thing you can find on this: Supermicro SNK-P0070APS4: CPU Cooler 4U - but maybe it's something for you?
The other answer (from Tremataspis) to this question is wrong. The correct cooler is the Noctua NH-U14S DX-3647
( Noctua NH-U14S DX-3647 (16.50cm) ) as it has the correct socket form factor (square, not narrow)