With the E31, you can get the performance and reliability you need on a budget you can afford, with Windows® 7 Professional preloaded on all Lenovo ThinkStation models. The new Lenovo ThinkStation E31 tower and small form factor (SFF) workstations provide the high-performance Intel® Core and Xeon® processors and error-correcting memory to deliver the professional results you need - at an entry-class price point. Professional results require powerful graphics and - the E31 systems supports both Intel integrated graphics as well as discrete graphic options from NVIDIA.Features DVI Yes DisplayPort Yes Total Number of USB Ports 8 Controller Type Serial ATA/600 RAID Supported Yes Graphics Controller Manufacturer NVIDIA Graphics Controller Model Quadro 410 Graphics Memory Capacity 512 MB Product Type Workstation Manufacturer Part Number 3695QAU Manufacturer Lenovo Group Limited Product Model 3695QAU Product Name ThinkStation E31 3695QAU Workstation Product Line ThinkStation Product Series E31 Brand Name Lenovo Number of Total Expansion Bays 3 Number of Total Expansion Slots 4 Maximum Memory 32 GB Standard Memory 4 GB Memory Technology DDR3 SDRAM Memory