SRCSAS18E - Intel Storage Adapter - RAID Controller Parowan Full-height, three-quarter length PCI: 9.5" x 4.4" (241mm x 112mm) Memory: Includes 256MB of Registered ECC DDR2 400MHz SDRAM (with support for up to 1GB) RAID Levels Supported : 0, 1, 5, 10, and 50 PCI Interface: PCI Express* x8 connector (can be used in full duplex x16 slot) via an x8 electrical connection with automatic downrev to x4