Amazon.com: Intel Xeon X5680 SLBV5 Six Core 3.33GHz CPU Kit for Dell Precision T5500 (Renewed) : Electronics
W715F DELL 2ND CPU HEATSINK AND FAN ASSEMBLY FOR DELL PRECISION T5500 / T7500 WORKSTATION - COMPATIBLE WITH SECOND CPU RISER BOARD - CARD / MEMORY FAN NOT INCLUDED
0F623F - Dell 2nd CPU Memory Riser Board Kit for T5500 WorkStation
Dell Precision T5500 Barebone 875W PSU Motherboard 2nd CPU Riser [T5500 Barebones] - $225.00 : Professional Multi Monitor Workstations, Graphics Card Experts
Intel Core 2 Duo Mobile T5500 LF80537GF0282M (BX80537T5500)
12 Core 3.46GHz XEON CPU +2nd CPU Riser upgrade for DELL Precision T5500,T7500 | eBay
Intel Mobile Core 2 Duo T5500 @ 1666.64 MHz - CPU-Z VALIDATOR