Help with upgrades

[Zenmeister]

Hey guys, I've finally decided on upgrading my PC (4 years old) after attempting to play PUBG. It currently runs PUBG at around 30 fps (lowest settings) and I hope to bring that up to 60 or so.

My PC currently hold these components:
INTEL i5 3570k 3rd Generation Quad Core 4x3,4GHz
1000GB HDD
8GB DDR3 (1333 MHz)
Grafik GeForce GTX660 (2048MB DDR5-VGA-DVI-HDMI-DirectX 11)
Audio - 6xUSB 2.0
2xUSB 3.0
650W
1xeSATA

I'm not fussed over graphics but I do like my frames! I was thinking of upgrading my GPU and RAM (after reading some articles and guides), but as a TOTAL newbie to PC components, I would really appreciate some help over which parts I should purchase.

PS. I'm mostly concerned about if the components would be compatible with the rest of my PC. My budget is around £200-£300.

Thanks a bunch

 

[Zenmeister]

What Res do you game at ?
If 60/1080p 1050ti-60/ 570-80

I play at 1920x1080, so are you suggesting to get the 1050ti for 60fps, or the 570 for 80 fps?

 

[Zenmeister]

Your RAM is slower than molasses and your CPU could use a good overclock. Your GPU is also painfully slow.
Biggest gains will be from a CPU overclock and a faster GPU. You'll need a better cooler (And a Z77 board... or Z68 or P67 in a pinch)

So priorities:
1. GPU
2.Cooler for CPU ( to be overclocked)
3. Change motherboard
4.RAM
am I right to assume the above? And any recommendations for GPU, cooler and RAM? Cheers