Asus is famous for beefing up specs on their products and same is seen on Asus ROG Phone. It has an overclocked Snapdragon 845 processor, at 2.9 GHz, about 100 MHz higher than normal. This is coupled with Adreno 630 GPU and 8 GB of RAM, with storage options of either 128 GB or 512 GB.
Performance wise, it was exceptionally smooth, all thanks to top of the line, overpowered specs. Even while casting a game to a TV, which requires a lot of resources, it ran perfectly fine and there were no lag or hiccups whatsoever. One major concern I had was that phone would overheat due to an overclocked processor and GPU, however, ASUS did think of that. Having such high spec also means that Asus ROG Phone needs to have some serious cooling to keep things running at their peak and this is provided by GameCool system. It comprises of vapor-chamber cooling, a carbon cooling pad and copper heat spreader. Plus, just in case you really want to go all-in with an extensive gaming session, Asus ROG Phone also comes bundled with an external Aeroactive cooler for good measure.
This adds an extra fan to mix and forces air into the phone from outside. I found it also helped device to feel a little more secure in my hands as I played. Aeroactive bolt-on also enables power and headphone connections to be run off side of phone, so that cables are unobtrusive while phone is being held in portrait mode. Regular power slot is also positioned on center of side for gaming when peripheral isn't attached.
Another great touch is the utilization of AirTriggers, two programmable ultrasonic sensors that give you game controls through haptic feedback. You just float your fingers above edge of screen, leaving whole screen free for visuals. When I tried it, I found that it was intuitive and meant I got to enjoy gaming experience rather than constantly looking down for on-screen buttons when using a regular mobile device.
Asus is also launching some accessories to compliment gaming experience on Asus ROG Phone. First, there is handheld TwinView dock which takes a page from Nintendo's book, introducing a secondary display which is identical to that of phone itself. Basically, it turns phone into a handheld console, complete with physical triggers on back. Most importantly, Asus will be working with mobile game developers in order to ensure that various games will take advantage of this second screen. TwinView dock uses Asus's Wigig docking and 802.11ad to provide Wi-Fi speeds of up to 4.66GHz. That means lag-free gaming on the big screen, and without a single wire in sight. Then, there's a desktop dock which essentially turns your phone into a desktop PC. Dock comes with a abundance of ports that you'd find on any motherboard: Ethernet, HDMI, DisplayPort, and multiple USB ports. With this dock, you will be able to play games on an external display with a keyboard and mouse, just like you would on an actual gaming PC.
Asus ROG Phone scored 304183 on Antutu benchmark which is one of the highest scores I've seen. You also get multiple USB Type-C connectors for accessories. On audio side of things is a headphone jack (plus the side one via detachable cooler mentioned earlier), DTS Headphone:X with 7.1 virtual surround sound and Hi-Res Audio support. Highlight, though, is front facing stereo speakers that come with a 'smart amplifier'. They're easily some of the most powerful speakers I've heard on a phone.
In summary, this is pretty much like Asus ROG laptops, which are overclocked, heavily powered and come with some great cooling tech to keep device running for long times. It's just impressive how Asus managed to deliver all that inside a smartphone.