Computer keeps rebooting by itself, without letting me go to window's login.

[ogmuffz]

Hello, I barely got my computer like recently (A couple days ago) and it was fine, till I had to switch out the graphic card because it was a faulty one. So now last night and this morning it was running fine, but now it gave me a black screen, then (No DVI Signal). So I manual reboot and now it just goes to (Starting Windows) to (No DVI Signal) Then reboots itself. Need some help here, spent alot of money and didn't think it would have all these problems. Don't know what to do as I am fairly new to the computer world. Typing with my macbook pro at the moment.

Computer Specs:
INTEL I7-3820 3.6 GHZ
Windows 7
ASUS P9X79 LE INTEL X79 QUAD 3 WAY SLI SATA 3
2TB SATA III 6GB/S 7200RPM 64MB CACHE 3.5" HD
8GB CORSAIR VENGEANCE 1866MHZ DDR3 (x4)
EVGA NVIDIA SUPERCLOCK GEFORCE GTX 660 TI 2GB 16X PCI

 

[C12Friedman]

Welcome to Tom's Hardware Forums,
Check the power connections to your graphics card to ensure you are using a PCIe connector and not an ATX/CPU connector. Is the new graphics card the same make and model as the old one? Could be a driver conflict if different.
Hope it helps