850W Corsair HX850 80+ Platinum

$300

We’re going to need a lot of power for this build, and good efficiency too, since it might need to remain switched on for extended periods of time while processing data. The Corsair HX850 gives us all the power we’ll need, with a bit leftover for a GPU upgrade or some extra drives. An 80+ Platinum rating should guarantee between 89-92 percent energy efficiency, ensuring minimum waste, and the fully modular design will let us get rid of excess power cables. A 100,000-hour lifespan means that the HX850 is future-proofed, letting you keep crunching numbers for (in theory) over a decade of continuous operation. Don’t do that, though: Let your system rest sometimes.