Display Driver on new PC Constantly Crashing with Nothing Open

I have recently ordered a custom-built PC from ibuypower.com and a few days after I got it my display driver would continuously crash (it seems pretty random on it's timing and can happen even when I have nothing open, making it hard to even get to my desktop after restarting my pc), and when it does happen it will continually do it over and over after I restart my pc for a solid hour or so, then it will seem to go on like nothing is wrong with it for awhile. It rarely recovers once the display driver crashes. I also make youtube videos and when rendering on this computer, no matter what format I render it out to, the video will result jittery and skippy. I've always been more of a software guy than a hardware guy so I don't know much, but I'm pretty sure it has to do with my graphics card or PSU, from the research I've done. My specs are as follows:

Video Card: AMD Radeon HD 7870 2GB - Single Card
PSU: 500 Watt
Processor: AMD FX-6100 CPU (6x 3.30GHz/6MB L2 Cache)
Motherboard: Gigabyte GA-970A-UD3 -- AMD 970
Memory: 8 GB [4 GB X2] DDR3-1600 Memory Module - ***Corsair or Major Brand
Processor Cooling: Liquid CPU Cooling System [AMD] - Standard 120mm Fan
Hard Drive: 1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s - Single Drive
Optical Drive: 24X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive - Black
Sound Card: 3D Premium Surround Sound Onboard
Network Card: Onboard LAN Network (Gb or 10/100)
Monitor: 22" LED 1920x1080 -- ASUS VS228H-P

Any help would be greatly appreciated!