Okay, so the title sounds a bit ironic, but with Dual-GPU Fiji based GPUs in a small PC, you are going to need quite a bit of processing power. So props to AMD for having the balls to make this choice. BTW I also know there will be an AMD version available, so the choice is yours.
Project Quantum shouts brute performance, their CEO Su stated it's a "16 teraflop gaming system", let me correct her that actually should be 17 teraflops.
Project Quantum isn't powered by an AMD CPU, but as it now seems, an Intel Devil's Canyon Core i7-4790K. Project Quantum was shown to be running an Intel Core i7-4790K "Devil's Canyon" CPU based on an ASRock mini-ITX motherboard. The i7-4790K was the processor used and the memory was half-height Crucial Ballistix. The SSD used AMD-branded (ODM is OCZ) and then comes with unified liquid cooling solution custom-tailored for AMD, by Asetek.
BTW I had never realized how incredibly small this unit is, check it out.