Building a new computer...

[Ceodore]

Use MSI or Nvidia cards. PNY cards are well known for being faulty and breaking down easily. Never have had a problem with MSI or cards right from Nvidia themselves. Also, you may want to invest in a stronger power supply. 520 might run everything fine, but your upgrade capability from there may be limited with that power supply. I recommend 800+. The CPU is a good choice, if you're building for games and not computing, as video games are GPU heavy. So your 4th gen i5 will be more than enough.

[KisaiTenshi]

Use MSI or Nvidia cards. PNY cards are well known for being faulty and breaking down easily. Never have had a problem with MSI or cards right from Nvidia themselves. Also, you may want to invest in a stronger power supply. 520 might run everything fine, but your upgrade capability from there may be limited with that power supply. I recommend 800+. The CPU is a good choice, if you're building for games and not computing, as video games are GPU heavy. So your 4th gen i5 will be more than enough.

MSI is kinda known for doing bad things to cheat synthetic benchmarks, but those are outliers, and not the only time someone has.

My personal preference is ASUS, but I've used Powercolor, EVGA and Sapphire. The last MSI card I had, self-destructed with the cooling fan blowing itself apart. Generally it's not so much the brand, but how you use your computer. If you have long hair, live in a high dust environment, smoke, or have pets of any kind, clean your computer every month or the fans will gum up the minute they're turned off.

The current card I have is a EVGA card that I was given and it's been nothing but stable. I generally prefer Radeon cards, but the current card is an nVidia card (because it was a gift.)

Get someone you know is great at building PCs and get their help! Do not attempt to build a PC for the first time all alone! I cannot stress this enough! I made that mistake and thought I was doing well, and when I skyped my friend who builds computers for fun (I don't understand how it's fun, but I guess some people really enjoy it) and I had to end up taking apart pretty much the whole computer and re-doing it (lucky I didn't plug it in or else that would have been $700 and something completely wasted!). This was after I'd spent pretty much all day doing it.

A friend ordered all the right parts (mostly high-spec parts) put it all together and neglected to buy the OS, so he tried to use his laptop drive... and things went downhill from there. I knew there was a problem when he ordered a separate bag of screws/motherboard-chasis standoffs... I was like "It had to have come with ones that fit that chasis" and he was adament that it didn't. Eventually after we put it all together... I discover the hidden "toolbox" in the bottom drive bay. Had he read the manual he would have known.