So, I picked up a couple X5690s from a trustworthy source and they had passed testing. This is my second 2009 to upgrade and the first CPU was routing, but the 2nd would just boot straight up without issue and not recognize CPU B. I tried different thicknesses of Arctic Silver, I've made sure the fan connector is plugged in, and when I swapped CPUs, the behavior was identical. No pins in the CPU B seem noticeably bent. I have no idea where to go from here to get CPU B up and running. Any thoughts? The next thing will be to put the original CPUs back in and see how it goes. Thanks for your help, folks.