First of all, it worked on the Dell Precision M4800 (I expected it since it was officially was a CPU option in their Dell website in the past). No stability issues right there.
There was an issue with the performance of the CPU (and that is likely Dell's part) is that it doesn't perform to it's specs. This is due to CPU current throttling (found out on Intel XTU) underclocking the frequency Best performance from this setup is 3.39 GHz on all 4 cores while stress test. I wish Dell can address it with their BIOS update.