HP 590617-B21 INTEL XEON X5660 SIX-CORE 2.8GHZ 12MB L3 CACHE 6.4GT/S QPI SPEED SOCKET-B(LGA-1366) 32NM 95W PROCESSOR ONLY FOR HP PROLIANT DL180 G6 SERVER. - Avanti Global Resources
Amazon.com: Vbestlife for Intel Xeon X5660 Six-Core Twelve Threads 2.8GHz 12M Cache LGA1366 CPU Official Version Suitable for X58, X79 Series Motherboards : Everything Else