This motherboard is designed for use with Acer Aspire 3100 and 5100 models. It is a PGA988 and PGA989 compatible socket type, with a S1G1 unit type, and comes in a quantity of 1. The motherboard is a MBABK02001 model, and is compatible with USB 2.0 and SATA ports. It is sold as an untested item, and is a great addition to any computer components and parts collection.