ASUS P50AD H8110L-ASUS-P50AD-0204 BIOS Everything You Need Windows 8.1 or other editions available Intel processors for productive multitasking and energy efficiency Wider discrete graphic choises for your multimedia use ASUS SonicMaster audio technology and intuitive AudioWizard interface for enhanced sound quality SuperSpeed USB 3.0 x 4 ports Ai Charger II technology for rapid recharging of mobile devices Super quite - 23dB at idle mode