Hey guys. I'm running into some problems with WoW running at 10fps in raids/greater invasions. This never used to be the case when I raided in Nighthold, but after taking a break and coming back I've been having major framerate drops even with the lowest settings and no add ons. I'm guessing this is a hardware issue, so I'm wondering what I can upgrade that will have the biggest performance increase. I'm quite new to pc upgrades so forgive my ignorance.
CPU: i7 860 @ 2.8GHz
Motherboard: ASUS P7H55-M
RAM: 8GB DDR3
Graphics Card: Nvidea GTX 750 Ti
Operating System: Windows 10
Hard Drive: SSD