MSI says the GX640 and GX740 are the slimmest and lightest gaming laptops currently available, though given the hefty proportions of machines such as the Dell Alienware models, that's not necessarily a huge claim.
The 15.4in GX640 measures 360x260x36mm and weighs 2.7kg, while the 3.2kg GX740, which comes with a 17in display, measures 395x278x40mm.
Powered by Intel's Core i5 processors, the GX series of laptops come with an ATi Mobility Radeon 3D discrete graphics cards with full support for DirectX 11.
The GX740 features with the ATI Radeon HD5870 graphics card while the GX640 features the HD5850 model. Both cards have 1GB of GDDR5 graphics memory, which MSI says it chose for its excellent visuals and relatively low power consumption.
Running 64bit Windows 7 Home Premium, both laptops come with 4GB of RAM, a 640GB hard drive, Wi-Fi, a 2Mp webcam and a four-in-one card reader. SRS-certified Premium Sound speakers and digital 7.1 optical surround output also feature.
While the GX640 boasts two speakers, for optimum sound performance, the GX740 incorporates five speakers; two hi-fi 3D speakers above the keyboard, two more along the front and a woofer for deep, bass explosions in the laptop's base.
ECO function buttons are also located on the laptop and allow users to instantly switch to one of five different power levels, suitable for the task the machine is being used for.
The GX740 and GX640 are priced from £999 will be available from March.
See also: MSI GX740 review
See all laptop reviews
See also: MSI GT640 and GT740 gaming laptops