I would not recommend running a gtx 980ti on that PSU, It is fairly low quality and it would probably be overloaded with an amd CPU and a 980ti. other than that it is compatible but the CPU does matter as it would bottleneck the GPU if it is too weak, if you have an 8350 you should be fine.
If you do not own this computer then let me do the entire thing for you. Just give me a budget and do you need an OS/monitor/peripherals? where do you live? what are you using it for?