I have 2 xeon 5660 (12 core 6 core each) and 16 gb ram i want to upgrade my current gpu (gtx 750 ti) to a 1660 super or 1080. I searched it up online online and some people say that it is not possible to install newer gpus in the machine while some say it is can someone tell me if it is possible to upgrade to these cards or not. Do I need a 6 to 8 pin PCIE express power adapter cable to make it work?