It turns out that the Fatal1ty X99X Killer isn't the only Fatal1ty-branded X99 motherboard ASRock is planning. There's also its bigger sibling designed for high-end gaming PC builds with four graphics cards, the Fatal1ty X99 Professional. The board is based on the same exact PCB as the ASRock X99 OC Formula, and has mostly the same feature-set, barring a few differences. To begin with, its VRM limits aren't as high, so it won't deliver up to 1300W of CPU power. The voltage and clock limits overall are lower. The board trades its pro-overclocker credentials for pro-gamer ones. One of its gigabit Ethernet interfaces is a Killer E2200 gaming NIC. The onboard audio is tuned for higher-impedance headphones on all channels (to drive multi-channel headsets). It also features USB 2.0 ports with higher power output, and voltage stabilizer circuitry, so your USB headsets and other gaming peripherals don't run out of power.