This requirement will exceed the capacity of most 110v sockets, so if you're based in the US, you'll most likely need a dual-PSU setup or a 1.8kW+ PSU with two power inputs, like the E-Power platinumsword mentioned. Most European sockets handle up to 3.5kW and sockets in the UK & Ireland handle up to 3.2kW (e.g. some rapid boil kettles). I'm not sure about other countries.
As all the energy a PC takes ends up being exhausted as heat, make sure you have adequate cooling to deal with this. Most electric heaters are rated at 1.5kW, so this will be potentially be producing as much heat as an electric 1.5kW oil-filled radiator (without a thermostat :eek: ) when all GPUs and CPU cores are running near or at max capacity. So don't be surprised if you need to open a few windows or run an air conditioner with this beast.