Coming in at 1.15KG without the fan, Scythe’s Orochi sounds like it could kill a motherboard or two just sitting on them. Taking that in mind, Scythe engineers have swapped out plastic push-pins in favour of a clip-based retention mechanism coupled with a stainless steel backplate for greater reliability.

orochi mount 1 Of Orbs and Blocks   ThermalTake DUORB and Scythe OROCHI
The provided steel backplate is fairly thick and screws are meant to be threaded through from the bottom.
4 plastic washers are used to insulate the retention mechanism from the board.

orochi mount 2 Of Orbs and Blocks   ThermalTake DUORB and Scythe OROCHI
Unlike previous coolers, Scythe used a retention clip system instead of push-pins. Plastic push-pins would have failed here.

At 598g, the ThermalTake DUORB is no where near the Orochi’s weight. As such, ThermalTake could rely on their traditional method of using a strut to clamp the base down onto the CPU.

duorb mount Of Orbs and Blocks   ThermalTake DUORB and Scythe OROCHI
The LGA-775 brackets will look familiar to those who have used their coolers in the past.
One thing that has changed is that the screws thread in from the top and nuts are used on the bottom.

 duorb mount 2 Of Orbs and Blocks   ThermalTake DUORB and Scythe OROCHI
A spring-loaded screw-nut is used to provide mounting pressure on the strut.