Crucial Adrenaline enables your Windows® based PC to start up twice as fast and boosts performance of your hard drive by up to 8 times. Comprising a 500GB Crucial m4 SSD, a 3.5” adapter bracket, and Dataplex™ software, Crucial Adrenaline intelligently places, or “caches”, the most frequently needed files (active data) on the SSD and keeps the less frequently used files (inactive data) on your existing hard drive.