It's a shame this was your choice of a base machine. For 400 to 500 I would have built something from https://www.reddit.com/r/PCMasterRace/wiki/builds but you are so far off what we start with that I hope you are inside the return period.
So I bought an Acer Desktop with Monitor keyboard/mouse for around 400-500$ and I want to turn it into a sort of gaming machine, the current specs on it right now are
Processor: AMD E2-6110 APU with AMD Radeon R2 Graphics
RAM: 4.00 GB DDR3 Memory
System Type: 64-bit Operating System
OS: Windows 8.1
HDD: 1TB Hard Drive
With networking integrated LAN+Bluetooth.
And I think by checking the PSU it is like 220W :/
It just says MAX. OUTPUT POWER: 220W and some other stuff.
And this is basically the case I found off google images:
So I was thinking of changing it into a sort of a gaming PC.
So the parts I was thinking I might be able to acquire soon are maybe.
1 or 2 GTX 980 4GB.
Another 16-32 gb
And the WATT is very low I wasn't sure which one to get, but a friend suggested this
And I don't really know about the case,
And am not sure, don't really wanna be buying all the parts all again, so I badly need help : /.
Please try help ASAP someone.