PC upgrade on £300-400 budget

[lukaszlegia1916]

Hi all.

I need advice on upgrading my 8-year old PC. The only change I made since I bought it was adding ssd drive (Evo 850) 250GB and changing video card to GTX 1060.


I can spend £300 for upgrade. I use my pc for:

1. Gaming (Football Manager 80% of time, other games 20%)
2. Editing video

PC spec:
GTX 1060 GAMING X 6GB
Msi H61mu-e35 1155 Matx (Msi H61mu-e35 1155 Matx)
Seagate Barracuda 7200.12 - hard drive - 500 GB - SATA-600
2x Kingston ValueRAM memory - 4 GB - DIMM 240-pin - 1333 Mhz DDR3 (Kingston ValueRAM memory - 4 GB - DIMM 240-pin - DDR3)
Xfx Pro 450w Power Supply Unit (core Edition) (Xfx Pro 450w Power Supply Unit (core Edition))
Intel Core i5 2300 / 2.8 GHz processor
1 x Cooler Master Centurion 5 II - mid tower - ATX/MicroATX (Coolermaster Rc-502 Centurion 5 Ii Midi-tower Case - No Psu

Couple questions:
1.If I need to add RAM is it advisable to buy 2x8GB of new RAM or I can just add another 8GB to existing one?
2. Is m.2 ssd drive a good idea?If yes but I would have to go over a budget of £300 I am willing to do so.
3. Will I need new power supply unit or current one will cope with new components?


Huge thank you for any suggestions,
Lukasz