Aurora R7, GPU, PSU, upgrade advice?

Hi there, having bought my Aurora R7 only just over a year and a half ago, I’m a bit gutted that I can’t play COD Warzone on high settings, even Normal is sometimes an issue. Perhaps I’m being unrealistic with my expectations.

Anyway, in order to resolve this I thought I could maybe upgrade my GPU (and likely my PSU). I however have extremely basic knowledge around computers and have been finding it somewhat of a mine field finding a GPU that the rest of my computer can handle, but is a worthwhile upgrade.

I was hoping that some knowledgeable person would be kind enough to offer me their thoughts and recommendations please. I have included the information I think someone would need in order to do this. Please let me know if other info is required. Max budget is around £600, I have AMD in mind because of the FreeSync, though I hear its not all that worthwhile if you're playing above 75 FPS, which I intend to I guess.

Given the low Wattage, I also expect that i would have to upgrade my PSU in order to get a worthwhile upgrade. Recommendations for this also would be helpful.

 

OS – Windows 10 Home

System type – x64-based PC

CPU - Intel(R) Core(TM) i7 8700 (6-Core/12-Thread, 12MB Cache, up to 4.6GHz with Intel(R) Turbo Boost Technology

Mobo – Alienware 0VDTV73 (As its made by Alienware, I’ve found getting details on this hard to come by, I believe it’s a 2666 Mhz, Board version is A00). Has 2 x 8 PCIe and a 4 PCIe slot.

RAM – 32GB 2666 Mhz (Only recently installed)

GPU – AMD Radeon ™ RX 570

Driver – 1TB SATA 7200RPM HDD with 32GB M.2 PCle Intel Optane Memory

PSU – 460W

460W EPA PSU Liquid Cooled Chassis (I think this is what is cooling the processor? Otherwise there is also a front and a top fan.

Monitor - AW2518HF Monitor which is a 240hz monitor with AMD FreeSync.

 

I have had a look around and at the moment leaning towards these;

MSI Radeon RX 5700 XT from Ebuyer for £370

RM 650x 80 Plus Gold 650 W Fully Modular from Curry's for £97.00

 

Thanks in advance.