ASUS GeForce GTS 450 (Fermi) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card, ENGTS450 DC OC/DI/1GD5 Exclusive DirectCU cooling makes the card 20% cooler and 35% quieter Engine overclocked to 850MHz Boost up to 50% faster with ASUS exclusive Voltage Tweak Higher overclocking capability with POSCAP and 4-phase power