5th generation Smart Array controller. Dual channels, can support up to 14 drives on each channel. Supports up to 32 Logical Drives with any combination of RAID Levels. Supports Ultra3 and Ultra2 Universal Pluggable drives. Ultra3 and Ultra2 can be mixed on the same channel. 64bit, 66MHz PCI interface boosts bandwidth up to a 533MB/s total transfer rate. 64bit memory addressing supports servers with greater than 4GB of memory. Upgradable to quad channels with optional module. 64MB Read/Write Cache on a removable battery-backed cache module. Supports Raid Levels 0, 1, 0+1 and 5. Two Internal 68Pin Wide Connectors. Two External VHDCI Connectors.