Just built a new computer, having graphics card issues
Just built this computer: [PCPartPicker part list](http://pcpartpicker.com/p/bZpP) / [Price breakdown by merchant](http://pcpartpicker.com/p/bZpP/by_merchant/) / [Benchmarks](http://pcpartpicker.com/p/bZpP/benchmarks/)
Type|Item|Price :----|:----|:---- **CPU** | [Intel Core i5-3570K 3.4GHz Quad-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80637i53570k) | $189.99 @ Microcenter **CPU Cooler** | [Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler](http://pcpartpicker.com/part/cooler-master-cpu-cooler-rrb10212pg1) | $19.99 @ Newegg **Motherboard** | [ASRock Z77 Extreme4 ATX LGA1155 Motherboard](http://pcpartpicker.com/part/asrock-motherboard-z77extreme4) | $132.86 @ Newegg **Memory** | [Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory](http://pcpartpicker.com/part/corsair-memory-cml8gx3m2a1600c9) | $52.99 @ NCIX US **Hard Drive** | [OCZ Agility 3 240GB 2.5" Solid State Disk](http://pcpartpicker.com/part/ocz-internal-hard-drive-agt325sat3240g) | $175.28 @ Amazon **Video Card** | [MSI Radeon HD 7870 2GB Video Card](http://pcpartpicker.com/part/msi-video-card-r7870twinfrozr2gd5oc) | $274.98 @ NCIX US **Case** | [NZXT Source 210 (Black) ATX Mid Tower Case](http://pcpartpicker.com/part/nzxt-case-s210001) | $47.98 @ Newegg **Power Supply** | [OCZ 600W ATX12V / EPS12V Power Supply](http://pcpartpicker.com/part/ocz-power-supply-ocz600mxsp) | $49.99 @ Newegg **Optical Drive** | [Lite-On iHAS124-04 DVD/CD Writer](http://pcpartpicker.com/part/lite-on-optical-drive-ihas124-04) | $17.99 @ SuperBiiz | | **Total** | Prices include shipping and discounts when available. | $962.05
When I plug my monitor in (actually a tv, [link](http://www.insigniaproducts.com/products/televisions/NS-L37Q-10A.html)) it flashes "Not Supported." Same goes for if I plug my [other monitor](http://www.newegg.com/Product/Product.aspx?Item=N82E16824009108). If I plug the either of them into the motherboard they will work, but it runs off of the integrated graphics instead of the graphics card. Not having much luck googling this problem.
Weird thing is, I left the tv plugged in and went to the bathroom yesterday, instead of displaying not supported it started working. It was a little weird how it was displaying, but it worked just fine and I tested out a few games and they looked great. I played it for about 30 minutes, then went to bed, and when I got back up today the same problems resumed. Any ideas?