Asus’ original Zenith II Extreme seemed like one of the best TRX40 models when we tested it, but it was tough to justify its price. And now that we’ve tested the only other $850 TRX40 motherboard on the market (Gigabyte's TRX40 Aorus Xtreme), we might be ready to finally make our decision. Asus sent a new board just in time to take a second bite of the apple.