Msi P55-GD55 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 • 1 PCI Express gen2 x16 slot (PCI_E2) • 1 PCI Express gen1 x16 slot supports x4 speed (PCI_E5) - supports ATI® Crossfire™ • 3 PCI Express gen2 x1 slots • 2 PCI slots, support 3.3V/ 5V PCI bus Interface On-Board IDE/SATA • One Ultra DMA 66/100/133 IDE controller integrated in JMicron® 363. - Supports PIO, Bus Master operation modes. - Can connect up to two Ultra ATA drives. (turkeyarena.com) • SATAII controller integrated in Intel P55/JMicron® 363 chipset - Up to 3Gb/s transfer speed. - Supports six SATAII ports by P55 - Supports two eSATA ports by JMicron 363 - SATA1~6 support AHCI controller with AHCI / SATA RAID 0/1/5/10 by P55. - E-SATA1 & E-SATA2 support RAID 0/1 & JBOD mode by JMicron 363 Audio • Chipset integrated by Realtek® ALC889 - 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.