With Grid+ V2, NZXT offers a digital fan controller, which is capable of handling up to 30W load. The NZXT Grid+ V2 is actually a small black box, which is easy to hide inside your case. Apart from that it's been paired with NZXT's CAM software, which is straight forward simple.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips