MSI K9N SLi Platinum Nforce 570 Sli Atx Socket AM2 2 Pci-e X16 Dual Gb Lan Ieee 4DDR2 Main Memory supports Dual DDR II 533/667/800 - 4 DDRII DIMMs (240pin / 1.8V), a maximum memory size up to 8GB 1 PCI Express x16 slot (PCI_E1), 1 PCI Express Lite slot (PCI_E4, compatible with PCI Express x1), 2 PCI Express x1 slots, 3 PCI slots, support 3.3V/ 5V PCI bus Interface, includes one orange slot which supports 2 master for MSI special PCI function card On-Board IDE port by NVIDIA nForce 570 - Supports Ultra DMA 66/100/133, PIO, Bus Master operation mode 6 On-Board SATA II ports by NVIDIA nForce 570 - Supports storage and data transfers at up to 300 MB/s RAID Function - SATA II 1-6 supports RAID 0/ 1/ 0+1 or RAID 5 mode by NVIDIA nForce 570