Msi P55-GD80 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*/1800*/2000*/2133* (OC) SDRAM, 16GB Max - Supports 1Gb/ 2Gb/ 4Gb DRAM size - Supports Dual channel mode Slots • 3 PCI Express gen2 x16 slots - If two graphics cards are installed at PCI_E2 & PCI_E4 slots, these two PCIE x16 lanes will auto arrange from x16/ x0 to x8/ x8 - PCI_E5 supports PCIE 2.0 x4 speed only - When PCI_E5 is in use, all PCIE x1 slots will be unavailable - supports ATI® Crossfire™ & NVIDIA SLI • 2 PCI Express gen2 x1 slots (turkeyarena.com) • 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. • SATAII controller integrated in Intel P55/JMicron® 322 / 363 chipset - Up to 3Gb/s transfer speed. - Supports six SATAII ports by P55 - Supports two SATAII ports by JMicron 322, support SATA RAID 0/1/JBOD. - Supports one eSATA / USB combo port by JMicron 363. - Supports AHCI controller with AHCI / SATA RAID 0/1/5/10 by P55. 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 two PCI Express LAN 10/100/1000 Fast Ethernet by Realtek 8111DL.