Msi P55M-GD41 CPU • Supports Intel® i5 / i7 based processors in LGA1156 package. Chipset • Intel® P55 Chipset - Supports QPI up to 6.4GT/s- Hi-Speed USB (USB2.0) controller, 480Mb/sec. - 6 SATAII ports with transfer rate up to 3Gb/s. - PCI Master v2.3, I/O APIC. - ACPI 2.0 compliant. - Serial ATA RAID 0/1/5/10. - Integrated AHCI controller. Main Memory • Supports four unbuffered DIMM of 1.5 Volt DDR3 1066/1333/1600*/2000*/2133* (OC) SDRAM, 16GB Max - Supports 1Gb/ 2Gb/ 4Gb DRAM size - Supports Dual channel mode Slots • 2 PCI Express gen2 x16 slots - PCI_E1 supports x16 speed & PCI_E3 supports x4 speed - supports ATI® Crossfire™ • 1 PCI Express gen2 x1 slots • 1 PCI slots, support 3.3V/ 5V PCI bus Interface On-Board SATA • SATAII controller integrated in Intel P55 chipset - Up to 3Gb/s transfer speed. - Supports six SATAII ports by P55 (turkeyarena.com) - Supports AHCI controller with AHCI / SATA RAID 0/1/5/10 by P55. Audio • Chipset integrated by Realtek® ALC889 / ALC888S VC2 - Flexible 8-channel audio with jack sensing - Compliant with Azalia 1.0 Spec - Meet Microsoft Vista Premium spec LAN • Supports one PCI Express LAN 10/100/1000 Fast Ethernet by Realtek 8111DL.