I bought this motherboard used from eBay with two Opteron 265 dual-core CPUs and 4x512 MB reg ECC DDR-400 to replace an older 32-bit dual Pentium 4-based Xeon motherboard in my file server. This unit is more of a workstation board than a file server board due to its layout, but it has four onboard SATA-300 ports and two gigabit NICS, so it works very well as a file server. Plus, it is an ATX board and doesn't need an EATX-capable case. The only gripe with this board is that the automatic fan speed control does not work. The board supports both 4-pin PWM and 3-pin non-PWM fans and no matter what the BIOS setting or jumper block setting, they all run at full speed.