Is it likely my CPU or graphics card limiting my FPS?

AlexHough

Honorable
Aug 31, 2013
4
0
10,510
I have
CPU: 17-3770k @ 3.5GHz
16Gb ram
Graphics card: GiGabyte GTX 660 Ti 2gb
MB: MSI Z77a-GD65 Gaming

While playing something like WoW I end up dropping to 10fps or lower during large raid battles. I have to turn the graphics setting all the way to low to help handle this but I'd rather upgrade a part or 2 so I don't have to compromise visuals. I'm not sure which piece is the limiting factor between the CPU and the graphics card.