MSI MAG VAMPIRIC 010 ATX Mid Tower Case in Black Operating system installed___Windows 11 Pro Education using this for intensive business using this for intensive business purposes will increase usage of ink cartridges and subsequently decrease the standard specified printing duration of three years 28 W Energy efficiency scale A to G Energy efficiency class (SDR) D Energy consumption (SDR) per 1000 hours 11 kWh Operational conditions Operating temperature (T T) 5 35 °C Operating relative humidity (H H) 20 85% Packaging content Quick start guide Yes Manual Yes Cables included AC 140 mm Number of top fans supported (max) 2 Rear fans diameters supported 120 mm Number of rear fans supported (max) 1 Number of front fans supported (max) 3 Storage Supported HDD sizes 2 Red Illumination Yes Side window Yes Number of expansion slots 7 Number of 2