No, there are no issues.
No, there are no issues.
This upgrade won't boost gaming performance, and a 980Ti would work just fine on this setup.
Your SSD and hard drive configuration could become the limiting factor later. 120GB isn't sufficient for an SSD when storing games and the operating system. It might be manageable if you play one game at a time, but titles like GTA5 can quickly consume your storage. Many games rely heavily on fast file loading, which an SSD greatly improves.