I chatted with Dell support and they assured me that those CPU's were supported. I purchased 2 3.0GHz Intel Xeon CPU's to replace the one dual core that we had with this system since we purchased it. We upgraded the BIOS to 2.70 then installed the CPU's. The system POST's just fine until the VERY END when we get this error: "Unsupported CPU combination." "System Halted"
Then it just stops. The CPU's are a matched pair. Now it's a dead box unless we go back to the single dual core CPU.