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Asus U31JG review

Our Rating :
Price when reviewed : £616
inc VAT

Great performance and battery life in one laptop is miracle enough, but the two year warranty and great screen seal the deal.


13.3 in 1,366×768 display, 1.8kg, 2.66GHz Intel Core i5-480M, 4.00GB RAM, 500GB disk, Windows 7 Home Premium 64-bit

Asus’ U-series laptops have impressed us over the last couple of years with their long battery life, despite the use of normal Intel Core processors, rather than the low-voltage variety used by most other ultra-portables. The new U31JG follows this trend: despite its 2.67GHz Core i5-480M processor and a dedicated graphics card, it lasted for over ten hours in our light usage test.

This is largely thanks to Nvidia’s Optimus technology, which switches between the processor’s integrated graphics chip and the GeForce GT 415M depending on whether you need performance or battery life. It’s not that fast – a score of 17fps in Call of Duty 4 means you’ll have to turn off most of the graphical effects in a modern 3D game to get playable frame rates – but it supports Nvidia’s CUDA which helps speed up certain operations in programs such as Photoshop. It will also easily decode HD video content.

Asus U31JG

You might want to output HD content to a larger monitor via the HDMI output, or pipe both audio and video to an AV amplifier. Movie soundtracks would certainly benefit as the U31JG’s internal speakers aren’t particularly inspiring, with a very compressed sound and no bass. If your sound system doesn’t have an HDMI input, you can also output audio via the headphone socket, which doubles as an S/PDIF output.

The screen more than makes up for any slight shortcomings with audio. We found that the 13.3in screen had a bright, even backlight and vibrant colours. This is partly due to the glossy finish on the screen, but the downside is that this can also reflect overhead lighting. Vertical viewing angles are also very tight, so you’ll have to adjust the screen’s tilt carefully to get the best picture. Once you get it right, however, it has good contrast and natural colours. Its resolution of 1,366×768 gives plenty of room for HD movies or the Windows desktop.

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Basic Specifications

Rating *****
Processor Intel Core i5-480M
Processor clock speed 2.66GHz
Memory 4.00GB
Memory slots 2
Memory slots free 0
Maximum memory 4GB
Size 29x328x233mm
Weight 1.8kg
Sound Realtek HD Audio
Pointing device touchpad


Viewable size 13.3 in
Native resolution 1,366×768
Graphics Processor Nvidia GeForce GT 415M
Graphics/video ports VGA, HDMI
Graphics Memory 1,024MB


Total storage capacity 500GB
Optical drive type none

Ports and Expansion

USB ports 3
Bluetooth yes
Wired network ports 1x 10/100/1000
Wireless networking support 802.11n
PC Card slots none
Supported memory cards SD, MMC, Memory Stick Pro/Duo
Other ports minijack audio output/S/PDIF (shared), minijack microphone input


Carrying case No
Operating system Windows 7 Home Premium 64-bit
Operating system restore option restore partition
Software included Microsoft Office 2010 Starter
Optional extras £115

Buying Information

Warranty two years RTB
Price £616