Summary: I had just bought a Supermicro X8DTE-F dual cpu motherboard on eBay and was lucky to find a pair of these quad-core cpu's for $65 each and of the same "stepping", which means that they left the production line about the same time. Same stepping is desirable when running dual cpu's.
Summary: This is the low power version of the E5520 processor. This is a great processor if you want to get things done without a lot of heat. I use this for virtualization. With hyperthreading on, you will have 8 cpu's to server the guests. This one uses 60 watt vs 80 watt of the normal version
Summary: Eigentlich ist diese CPU für Servermainboards gedacht, jedoch gibt es einige X58 Mainboards welche XEOn CPUs anstandslos annehmen, darunter das ASUS P6T WS und so ziemluch alle Gigabyte Boards mit X58 CHipsatz.