Micro ATX (mATX) motherboard measures 9.6 x 9.6 square inches, which is just a slightly smaller than the ATX form factor.  The mATX platform supports desktop processors and has less than 4 expansion slots (combination of PCI and PCI Express) and rich I/O interfaces which is ideal for those budget and space sensitive applications where performance and expandability are balanced.

RX45Q Intel® Q45 mATX Motherboard supports Core™ 2 Quad/ Core™ 2 Duo processors Features: Dual DVI, 1 PCIe x16, 1 PCIe x4, 1 PCIe x1, 1 PCI, 2 COM, 12 USB, 6 SATAII, 2 Gbit LAN, TPM 1.2, iAMT RX35Q Intel® Q35 mATX Motherboard supports Core™ 2 Quad/ Core™ 2 Duo processors Features: 2 IEEE 1394, 1 PCIe x16, 1 PCIe x1, 2 PCI, 2 COM, 10 USB, 5 SATAII, Gigabit LAN, LPT, IDE, Floppy, TPM RX965Q Intel® Q965 mATX Motherboard supports Core™ 2 Duo/ Pentium® D/ Pentium® 4/ Celeron® D processors Features: 1 Gbit LAN, 1 PCIe x16, 1 PCIe x1, 2 PCI, 2 COM, 8 USB, 6 SATAII (3.0 GB/s) RAID, LPT, IDE, Floppy, TPM RX965QV Intel® Q965 mATX Motherboard supports Core™ 2 Duo/ Pentium® D/ Pentium® 4/ Celeron® D processors Features: LVDS onboard, 2 Gbit LAN, 1 PCIe x16, 3 PCI, 4 COM, 10 USB, 6 SATAII (3.0 GB/s) RAID, LPT, IDE, Floppy, TPM RX945G Intel® 945G mATX Motherboard supports Core™ 2 Duo/Pentium® D/ Pentium® 4 processors Features: 1 Gbit LAN, 1 PCIe x16, 1 PCIe x1, 2 PCI, 2 COM, 8 USB, 4 SATA, LPT, IDE, Floppy RX945GC Intel® 945GC Cost Saving mATX Motherboard supports Core™ 2 Duo/ Pentium® 4/ Celeron® processors Features: 1 Gbit LAN, 1 PCIe x16, 1 PCIe x1, 2 PCI, 2 COM, 8 USB, 4 SATAII, LPT, IDE IN915GVE Intel® 915GV mATX Motherboard supports Pentium® 4 Prescott/ Pentium® 4 processors Features: 1 PCIe x16, 3 PCI, 4 SATA, 2 COM, 8 USB, IDE, LPT, Floppy