It might seems like jooking, but this GPU is really bad. Im not an expert in hardware, but I recently bought computers parts to make my own computer. I did a lot on research to buy my GPU and I obliviously checked this one. This is a old model they renammed. The Geforce 610 is the same as the 520. If you want to do internet surfing and that kind of things, Its a good gpu, but if you want to play WoW... its not a very good choice.
I can't tell if it is better than the one you actually use, but if you really want to upgrate your GPU look for a newer model.
Well the 610 is quite bad for gaming its mainly for home theater PCs.
GPUs can be quite tricky if you don't have much experience.
And WoW is really CPU dependent so if your CPU is crap.
You wont get much of a performance boost if you just update your GPU.
ATI 7850 / 7870
Nvidia 660 / 660TI
and Some thing like a Intel i5 3350P / i5 3570K CPU
So if you have like a old Phenom dual core i would strongly recommend upgrading your CPU And Motherboard first