which parts to upgrade to improve gaming performance

[York_2]

So i bought my pc pre built many years ago but now when i play games they run very poorly. Im basically just wondering which parts do i upgrade to improve gaming performance the most.

model: acer aspire t3-710
i5-6400 2.7GHz
12gb RAM
nvidia geforce gt730
2.73TB
windows 10

I would like to play world of warcraft at around 60 fps high settings

 

[popatim]

It's the GPU holding you back. What's your budget? Keep in mind you may need a new power supply as well; I suspect this is a definite but you may change your mind once you see the prices for cards that will run Wow at a steady 60fps on High.

 

[York_2]

It's the GPU holding you back. What's your budget? Keep in mind you may need a new power supply as well; I suspect this is a definite but you may change your mind once you see the prices for cards that will run Wow at a steady 60fps on High.

i have £400 set aside, at the moment, for upgrades but i can easily go over that if need be.