Gaming GFX Upgrade for old Workstation

[OspreyO]

I don't really have the budget for a whole new PC.
But I'm thinking I could add some graphics to one of my existing PCs.
The aim is 1080 gaming nothing more. Al ready have a monitor.

PC1 - HP Z230, 8GB RAM DDR3, SSD, E3-1245v3 @ 3.40GHz
This PC would need a new PSU and a adapter from 24 Pin to 18 Pin ATX

PC2 - HPZ600 32GB RAM, Dual Xeon X5670 (2.93ghz/6-core)
This PC has a 650W PSU HP but only one 6pin 75w Supply.

Games mainly in use are hearts of Iron, Solaris and WOT.
Though this would expand if we could play other titles.

I'll get nothing for these machines selling them.
And I know I should probably just ditch them and put a Ryzen machine together.
But I don't have the funds for a full machine at the moment. Maybe about 300 max.
Maybe I should just by a 1050 and leave it at that till I have more funds.

The machine above I was using for Development stuff. They just happened to come my way.

Any suggestions.

 

[Quartz]

The 1650 Super doesn't require external power. The 1660 Super and above seem to require one 8 pin power source.

 

[OspreyO]

The 1650 super seems to tick all the boxes.

Thanks for that.

 

[OspreyO]

Picked up a 1050ti locally for about 80.
Stuck it in the E3-1245v3 seems like the only thing thus far that's bottlenecking is the ram
And only on one or two titles.

 

[Quartz]

Excellent. Have fun!