HP Pro 3500 Motherboard Overview The motherboard used in the HP Pro 3500 Microtower PC is a custom-designed board by HP, often based on the Micro-ATX form factor. It supports Intel's 2nd and 3rd generation Core processors (Sandy Bridge and Ivy Bridge) using the LGA 1155 socket and is designed for business and productivity computing needs. Key Specifications: Form Factor: Micro-ATX (244 mm x 244 mm) Socket Type: LGA 1155 Chipset: Intel H61 Express Chipset Processor Support: Intel Core i3 / i5 / i7 (2nd and 3rd Gen) Intel Pentium / Celeron processors (Sandy/Ivy Bridge) Memory Support: 2 x DDR3 DIMM slots Up to 16 GB DDR3-1333/1600 MHz RAM Expansion Slots: 1 x PCI Express x16 1 x PCI Express x1 1 x PCI (legacy) Storage Interfaces: 4 x SATA 3.0 Gb/s ports Integrated Graphics: Dependent on processor (Intel HD Graphics) Audio: Integrated Realtek ALC662 or similar, HD Audio Networking: Integrated Realtek 10/100/1000 Ethernet LAN Rear I/O Ports: 4 x USB 2.0 1 x VGA 1 x HDMI (may vary by model) 1 x RJ-45 (LAN) Audio in/out jacks Internal Headers: USB 2.0 headers (for front panel ports) Front audio header System fan, CPU fan headers Power connectors (24-pin ATX, 4-pin CPU) Notable Features: BIOS with basic business features (asset tagging, boot control) TPM (Trusted Platform Module) header (may be unpopulated) Designed for HP OEM systems — not standard retail availability