Lenovo Legion Y720T-34ASU
AMD Ryzen 5 1400 3.20 GHz CPU
Radeon RX 570 4GB GPU (MSI reference card, Elpida memory)
8 GB RAM (1x8GB Samsung)
1 TB HDD (Seagate)
UserBenchmark performance results http://www.userbenchmark.com/UserRun/6079158
You should maybe put one of these in that PC - you might need a bigger PSU though;-).
Ther top one is a new XFX RX Vega 64 Liquid.
The lower one is a PowerColor R9 FuryX.
Those Fury X cards are still pretty good GPU's even today, as are R9 Nanos.
I have been running a pair of R9 Fury X, or R9 Nanos or, FuryX+R9 Nano in Crossfire for ~ 2 years now.
You can now buy used R9 Nanos for ~ 150, just FYI if you are interested. You won't get the nice red led RADEON logo on those though.
Single RX Vega 64 is faster than a Single Fury X, obviously, but a pair of FuryX or R9 Nanos give better OpenCL benchmark performance and also perform as well / better in some DX11 Crossfire / DX12 MultiGPU games.
If you are interested in RX Vega 64, the prices dropped recenlty. I managed to get hold of a new RX Vega 64 Liquid for 570 including delivery. No free games with it but the only way to get 2 slot 40mm wide RXVega 64 thay performs well. The cost difference versus a "Black Friday" PowerColor RX Vega 64 Red Dragon or Sapphire Vega 64 Nitro+ was only ~ 110. The AIO cooler saves me stripping down an AIB GPU. It avoids paying additional cost for a waterblock (if I can even find one for those AIB cards) and potentially voiding the warranty on the card. I think liquid cooling the PC is lots of work versus just buying AIO watercooled GPU's and AIO CPU coolers.