ismailjamalx11 I don't entirely trust the older CX power supplies for my own builds, although I admit that this view of mine has been influenced by this site. My normal advice for 980 Ti / 1080 Ti builds with ~100 watt CPU TDP builds is tier 1, 650 and 850 watt PSUs for single and dual GPUs. I bump the preceding advice to 750 and 1,000 watts, if both the CPUs and GPUs have aggressive to extreme overclocks. With that said, in your position I would plug the new 1080 Ti into the CX 600 for now and wait. By next week, we should know a lot more about the RX 2080 Ti's. I'm eager to see how much higher the power consumption pushes past 280 TDP. If independent hardware reviewers find that power consumption figures are much higher, then I would purchase a wattage that supports that, in order to future proof. I plan to use my EVGA p2 850 for it's entire 10 year warranty, so it's $140 purchase price back in 2015, was worth the investment and grants me peace of mind.