Update: According to Hackaday, this is going literally nowhere. Follow the link to read why.
Standard copper heatpipes and heatsinks can be pretty boring and unoriginal, so the team behind the new Silent Power PC have resorted to copper foam to cool their system.
The copper foam sits atop the case like a bushy patch of hair, transferring heat away from the internal components using its "micro-circulation" capabilities. The foam essentially works by having the air inside it heat to very hot temperatures, causing it to expand and move to the outer regions, effectively creating air circulation. With the copper foam, there's no need for fan cooling at all, making the PC silent.
The Silent Power is currently being offered as three systems on a crowdfunding pre-order basis: if the company reaches its €45,000 target through pre-orders of their systems, they'll enter production. Each system differs in RAM (8 or 16 GB) and solid state drive capacity (500 or 1000 GB), while other specifications are fixed.
CPU-wise you get an Intel Core i7-4785T, a quad-core hyper-threaded part running at 2.2 GHz. There's also an Nvidia GeForce GTX 760 graphics card included, which should make this system a very capable gaming PC. Unfortunately, due to the nature of the system's construction and cooling system, neither part is upgradeable at this stage.
Other features include a light bar on the case's front edge, controllable through an ambient light sensor and included software, plus a movement sensor that can automatically power the system on when you sit down at your desk.
The base model Silent Power PC will set you back €699 (~US$930) for 8 GB of RAM and a 500 GB SSD, but there's also €769 (~US$1,030), and €1,159 (~US$1,550) models available if you want more RAM or storage.