Upgrading my graphics card

[brutalforcex]

Hello,
Lately I have been looking for a new graphics card because almost every game that I play is lagging, but I'm not sure which card to pick because I'm not that experienced and I don't know if it is good for it's price of if it works with my PC.

My PC components are:
AMD Athlon x4 750K
Motherboard-ASUS F2A55-M LK
8GB ddr3 RAM dual channel
Nvidia GT 730 2GB DDR3

My budget is around £140, but the prices in my country are ~20% more expensive from what I have seen.

The cards that I was looking at are :
GTX 1050 2GB GDDR5 (£130) and Radeon RX 2GB GDDR5 (£140)

The things that I'm not sure about is the VRAM, do I need more than 2 GB? because I don't care about the graphics, I care about the fps more than the looks.
The second thing I want to ask is if they work with my computer.
The third question is if I can play the newer games such as Overwatch or PUBG with an acceptable fps.
And the last question is, are there any cards better than these two that fit within the price range?

Thanks for reading my post and sorry if my English is bad, it isn't my main language.

 

[rhelmar1]

The VRAM is similar to regular ram. You only need more if your pc uses it. If you were to upgrade from 16gb ram to 128gb you wouldn't see any difference. Less demanding games like PUBG and overwatch won't use more than 2. Games like GTA for example will. So either is fine. The 1050 is faster than the 560. What will cause you more troubles is your CPU. It's too weak. I don't think you will reach 60 fps with that.

 

[RobCrezz]

For £130 you can get a GTX 1050 ti 4gb:
https://www.overclockers.co.uk/palit-geforce-gtx-1050ti-stormx-4096mb-pci-express-gddr5-graphics-card-gx-03t-pl.html