I recently bought a R9 280x graphics card for gaming with a hp z400 workstation machine. I then realized that the power supply is only 475w which is not sufficient for the 280x. so I then decided to buy a new psu to meet the power requirements but did some research and found that the motherboard/psu for the z400 are proprietary and not atx standard. Will i be able to buy a new mobo and/or cpu (current one is intel xeon w3680) and use it in the case with the remaining parts? or is there a cheaper way to solve the power issue?