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Overall, it's hard to fault the Zenbook Prime's performance. The Core i7 CPU and the fast solid state drive ensure that things move along swiftly. Using the out-of-box configuration, boot-up time for the Ultrabook was clocked at 20sec from a cold start, and resume time from sleep mode was a mere 2sec. Using the laptop for hours in our lap for tasks such as word processing, emails and Web browsing, the base of the unit got slightly warm, but not enough to become uncomfortable (although it is winter).
Noise also wasn't an issue with this Ultrabook. The fan inside the chassis piped up when the processing load was full, and it worked intermittently during other times, but it was never bothersome, unlike the fan in the Fujitsu U772, for example. Air intake vents are located on the rear of the base and can easily be blocked while using the Ultrabook on your lap, but there are lots of them and the chances are you probably won't block with battery like Apple M9007 Battery , Apple M9008 Battery , Apple M9184 Battery , Apple M9421 Battery , Apple M9422 Battery , Apple M9627 Battery , Apple M9628 Battery , Apple MacBook 13 inch Battery , Apple MacBook Pro 15 inch Battery , Apple MacBook Pro 17 inch Battery , Apple PowerBook G3 Battery them all at the same time. Warm air exits up through the vents on the spine of the chassis, just in front of the screen.
The stand-out feature of the Zenbook Prime is its 13.3in screen. It has a Full HD resolution of 1920x1080, which is the highest resolution currently available for a thin-and-light laptop, and it's perfect for multitasking — we're writing this right now with two windows comfortably open side by side: one for Google Docs in which we are writing, and one for Gmail, which is making it hard to ignore work emails. More than the resolution though, the screen is excellent because it's an IPS panel that possesses wide vertical and horizontal viewing angles. We didn't have to adjust the screen at all during our tests in order to make the picture look right. Colours, contrast and brightness are all top-notch on this screen and it's definitely the best we've seen on an Ultrabook — it's better than the Samsung Series 9's screen thanks to the higher resolution.
Two slits on either side of the chassis provide a passage for sound to escape from the Zenbook Prime's speakers. They are of good quality considering the slight dimensions of this laptop, even though they are not very loud. In a quiet room, they can make for enjoyable music listening and YouTube viewing. A good thing about their location is that you can't muffle them unless you are pressing both sides of the laptop into your thighs while using it on your lap.
You can't easily access the internal components of the ZenBook Prime, but it's not designed to be end-user serviceable. It has a panel on its base that is held together by a series of tiny torx screws. Unless you have a set of such tiny torx screwdrivers, your hopes and dreams of playing with this laptop's gizzards will go unfulfilled. It's this integrated, non-user-serviceable design that has allowed ASUS to make the Zenbook Prime so thin. It has also allowed it to implement a configuration that is very impressive for such a thin laptop.