Black screen once video card driver is installed

I built a new Solidworks workstation with the following components:

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor
Motherboard: Gigabyte GA-Z77-DS3H ATX LGA1155 Motherboard
Memory: Crucial Ballistix 8GB (2 x 4GB) DDR3-1866 Memory
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk
Video Card: ATI FirePro V4900 1GB Video Card
Power Supply: Sparkle 600W 80+ Certified ATX Power Supply
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit)


I assembled everything and installed Windows 7 Professional 64. I installed the LAN/USB/etc. drivers from Gigabyte's website and rebooted. I downloaded an ISV certified video driver from AMD's website that was optimized for Solidworks 2014 (driver version 9.003.3). I installed the driver and rebooted, and after the POST and "Loading Windows" screen only got a black screen. I am able to boot into safe mode, but when trying to boot into normal Windows I only get a black screen.

I figured the video driver was to blame, so I downloaded the standard FirePro driver version 13.152.4. I deleted the display from device manager and successfully rebooted into normal Windows. I installed the new driver, rebooted and still get a black screen.

I then turned off the computer, pulled the video card, and successfully booted into normal Windows with onboard video.
What could be causing this issue? What can I do to try to further diagnose the problem? Thank you so much in advance.