Hi there everyone. A buddy of mine is upgrading to a 1080ti and he is gonna sell me his 980ti. The question I need to ask is I currently have a XFX XTR 550w PSU in my i5 4590, R9 280x system. I was wondering will my PSU be sufficient enough for the 980ti, or do I have to upgrade to a higher wattage psu? Thanks for reading. Hope to hear from you.