ASRock has used the Extreme line in their motherboards almost as far as I can remember. The lineup usually starts with an Extreme3 and ends with Extreme9 (or Extreme11 for some special products). The Extreme3 and Extreme4 boards have always been reserved for the entry level, attempting to offer a feature set found on more expensive boards from the competition. Many users (and reviewers) have called the Extreme4 one of the better 'bang for your buck' motherboards available.

The ASRock X299 Extreme4 is aiming high. It has large dual heatsinks to keep an 11-phase power delivery cool, dual M.2 slots both able to work at PCIe x4 speeds, SLI/Crossfire support, and USB 3.1 ports on the rear panel. While it may not have some of the added extras from the mid-range price segment (three M.2 slots, three-way GPU, front panel USB 3.1), it has enough of the major features to merit a good entry into the platform.