UPDATE: I decided to not get that GPU, and instead went for a GTX 750 Ti. When I got the card, I noticed it has a 6-pin PCI-E port, which my PSU doesn't have, alto I can get a molex to pci-express power adapter for cheap in a store. Also, I went on a PSU calculator website to check how much wattage the system will be using, and it said that it will be using 255 watts of power. So since I have a 420w PSU (heheweedlol) I think I won't be having problems with the performance throttling, alto I'm a little concerned about the performance with the CPU, which I'm planning to upgrade asap to a i5-3570 non K.
Recently, my Radeon HD 7750 that i was using for a long time has called a quits on me, and stopped working normally. The picture is all reddish with black bars and the picture was very zoomed in. I have no idea why that happened but i think its because of the age, because its 8 years old. I was looking on a website sort of like ebay and craigslist for something good and i found a Zotac nVidia GTX 560 being sold for 35e. I went on youtube to check how it performs with games i want to play, and i am satisfied with the results.
Here is the page in anyone is intrested.
However, there is one problem.
I checked the specifications page about the card on Zotac's website and saw that it wants 150 watts and a 450 watt power supply, however, i have a 420 watt power supply and im worried that,
1) The GPU will just die because it's not getting enough power.
2) The PSU will give up because it's using too much watts.
I don't know if i should get a different GPU that requires less watts or to get a better PSU, which i'm not planning to do, so i decided to ask the ltt forums for some answers. I'm hoping for a fairly quick reply from someone who knows this stuff better than i do.