I read that the original cables were thrown out, but how about a Molex to PCI-E AUX instead then? You can't buy the wrong one, and a 1060 doesn't draw that much power that it would be a problem.
Note: I am not specifically recommending the item in the link, it was just to show what I meant.
Also, tell your mom to never throw out any cables she doesn't know what is - I always save all cables until I get rid of the item they belong to. You never know if you'll need them. :)
Okay, thanks, final question though :) Is that adapter the correct one? It looks like it only have 3 pins in it whereas the molex pin has 4?
> GTX 550TI
1x 6-pin PCI Express
molex isn't "normal" in 2017, but you may get away with one of these.
I'd tend not to recommend it though.
The RX 480 only draws around 150w, which isn't a huge amount. You should be fine I'd say with any PSU 400+w. As another member said, you can get a dual molex to 6 pin pci that looks like this.
If you can list the PSU you have in the build, myself or someone else will be able to tell you if the PSU comes with the PCI cable or if an adapter like that will be needed. If the PSU is only 400w or even lower, it would be ideal to list all your parts, so someone can check you will have enough power available.
Worst case you may end up needing a new PSU, something like this 500w EVGA bronze 80+ is reliable, should cover your power requirements (depending on other components, but I'd be surprised to find otherwise) and not overly expensive (£57) for what your getting.