MSI is at it again, today unleashing a pair of new gaming notebooks that are quite difficult to differentiate at first glance. We’ll start with the GX623, which arrives with the company’s exclusive Turbo Drive Engine that enables one-touch access to overclocking. On the flip-side, the unit also includes an ECO Engine that enables it to conserve power when less intensive applications are running.Specs wise, it features a 15.4″ LCD, an ATI Radeon HD4670 graphics card (512MB of DDR3 RAM), a built-in S/PDIF audio