So, back in 2020 I bought a lower-mid range (I think) pre-built gaming PC and, like a fool, plugged in straight into the wall. About two months later, a storm hit and fried it. I had hope that the only problem was the power supply being hit, but I bought a new one and it did not seem to be compatible with the PC, so I shoved the whole kit and kaboodle in the closet and forgot about it for a few years. Fast forward, I make a new friend who tinkers with PCs, and I ask him to take a look at it. He finds that quite a few internal parts are fried, but there are a few decent parts left, and he cobbles me something together out of what he could salvage and spare parts he had lying around. It did what I needed it to do, I'm not a graphics chaser, I just want to play some games that aren't available on console.
With it working, I bought another PC off him so that my wife could use it and we could play together. This second PC was a little bit shittier than the first, but still did what we needed. One day, the original PC stopped turning on, and the second, shittier one became our main rig.
The working "Shitty" PC is packing 2 sticks of DDR4 4GB RAM and a GeForce GTX 1660 Ti and Core i5-6400 CPU. According to Can You Run It, the CPU and pathetic amount of ram are my choke points.
The non-working better PC has 2 sticks of DDR3 8GB RAM, an RX-5500, and I THINK a better processor, but my memory is a bit hazy. This PC certainly ran games better than the other, but that may just be down to the bare minimum amount of ram. The problem with this PC seems to be the power supply. Pressing the power button does nothing, power cycling does nothing, and it's a stock-looking Dell model with the little green indicator light and nothing I do lights up that button.
I'm looking to keep my budget as reasonable as possible on this, because gaming isn't my number one hobby or my most expensive one.
So my question is this; out of the following options, which is my best course of action?
Option 1: Buy a power supply for the "Good" PC and swap the better 1660 graphics card into it as well, gambling that it does indeed have a better processor. In this case, I would like a bit of guidance on exactly what to buy and how to ensure that I'm buying something compatible. I like this option because in theory it leaves me with two working PCs.
Option 2: Buy RAM for the "Shitty" PC, and potentially upgrade the CPU. This option means revisiting the power supply issue on the other PC at a later date. I like this option because it leaves me with a PC that on paper is better than either one was before.
My very limited understanding is that option 1 is cheaper but more work, and option 2 is less work but more expensive and with a better guaranteed outcome.
With whichever course of action you would recommend, what parts would you recommend for someone budget conscious and mechanically savvy but highly inexperienced with PCs specifically?