I recently purchased a Dell T7500 computer on eBay and I am very happy with it. Call it a return to computer assembly fun and excitement for me, as I have been out of it for a number of years now. Due to a divorce, I am now starting to reinsert myself into computer assembly. Problem is I've had some issues with upgrading the CPU in this machine based on some of the things that I saw on eBay, and purchased on eBay. Namely, the claim that the fastest CPU upgrade I could get for this machine was an Intel Xeon w3690 3.4Ghz. I bought this CPU, installed it in the socket on the motherboard, and upon firing up the computer all I got was the blinking lights 2, 3, 4, with the fans just whirling around at high speed. The computer did not boot. The original chip in the machine was a e5603 CPU at 1.6 gigahertz. I read in another Forum somewhere that the w3690 CPU will indeed work with this machine, but I don't know what I can do to get it to boot. I assume that I have to start with updating the BIOS of the machine first. My question is is this a wild goose chase for me, utilizing bad information, or is it in fact feasible? If it is feasible how should I proceed. Thanks for any answers I receive.