The easy-to-upgrade IdeaCentre K450 desktop PC brings super-fast processing, high-performance graphics and innovative features like the three-speed Power Control Switch, so you can dial up performance whenever you need it.<br><br><b>Three-speed power control switch</b><br>The IdeaCentre K450 is so powerful we put a 3-speed power control switch on it: turbo red for speed and power, auto blue for normal use, and cool green for quiet, energy-saving operations.<br><br><b>Graphics Designed for Gaming</b><br>The latest 3D games are smooth as silk with up to NVIDIA® GeForce® GTX660 1.5GB graphics or AMD Radeon™ HD 8670 2GB graphics.<br><br><b>7.1 Channel Surround Sound</b><br>Whether you're gaming or enjoying a movie, a home theatre audio configuration will help you live the experience to the max.<br><br><b>Storage & Memory</b><br>With up to 32GB DDR3 memory, you can drive your PC's performance and multi-tasking power to the limit. And with up to 4TB HDD storage you'll have more room than eve This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 1560-01-121-7374, indicating validated use in U.S. government and defense logistics supply chains.