Hi, I own a Dell XPS 8900 that came with an intel i5-6400 CPU, and I want to upgrade it. I understand that only certain cpus will be compatible with the motherboard, so what are my best options?. I have already increased my power supply and installed a gtx 1080 into my computer. I want the best upgrade possible as I intend to use high end programs and play video games on my computer. I was looking at the i7-8700k but I do not think that will be compatible. If you recommend the purchase of a new motherboard please list your recommendations. Thanks for any help, and feel free to ask questions.