C.), 1800(O.C.), 1600(O.C.), 1333, 1066, and 800 MHz Non-ECC,Un-buffered Memory. The LGA Socket is compatible with all Intel Core 2 Quad, Core 2 Extreme, Core 2 Duo, Pentium Extreme, Pentium D, Pentium 4, Celeron, and Intel 45nm, Core 2 Extreme, Core 2 Quad and Core 2 Duo processors. The P5N64 Pro is equipped with Intel EM64T/EIST Hyper-Threading Technology offering FSB (Front Side Bus) speeds of 1600, 1333, 1066, and 800 MHz. The P5N64 Pro also utilizes the 790i Ultra chipset to offer hybrid-SLI support in both quad and tri-SLI modes through the 4 PCI-e x16 ports (2 of them are Gen. 2.0). The P5N64 Pro provides ultimate storage options with 6 SATA 2 connectors, 2 eSATA with RAID 0, 1, 10, 5 support and 2 SAS ports with RAID 0, 1, 10 support. Additional extra features include a 2 gigabit LAN for double the network speed, 8 USB 2.0 ports, an onboard wireless LAN card with 802.11g/b support, an ADI AD1988B 8-Channel High Definition Audio CODEC, and unique ASUS applications to provide advanced hardware support. Added peripherals may be connected through the 6 USB rear panel ports, 1394a, and S/PDIF Outputs. The ASUS P5N64 WS Professional was released on May 16, 2008 and has an MSRP of $189.99.