I've got a gtx 650 with two connectors at the back and I'm wondering why there are two of them? I've had it for about two years now, my computer only had one connector thing for it. ("Connector thing" you probably can tell I don't know much about this stuff)

I assume that is a power supply, if I upgraded would I get any benefit from doing so?

These are my specs: http://pastebin.com/uv3FX1c8
(I was running out of memory so I ordered a Seagate Expansion 1TB Portable External Hard Drive USB 3.0 on Amazon and picked up a 64gb flash drive from walmart.)
The specs list was not updated with memory info yet.

I know most people would say not to waste money on upgrading anything but I do as I please! I'm looking to buy either a new power supply, fan for the apu or another 8 gigs of ram. For around 60 or less.

If you know enough about computers and can tell me what should be prioritized first and include a link to the exact thing that would work in my setup, I would be greatful!