White Dashes while Windows is Booting up, but Windows boots up fine.

Specs:
Windows 7 Profesional 64-bit
CPU: AMD FX8120 3.10 8 Core Processor
MB: ASUS AMD M5A900X-EVO
RAM: 4 GB x2 (8 Gigs)
Video Card: EVGA GTX 550 Ti (nVida Geforce)

I built a custom computer last week. Whenever I boot up my computer. There is a White Dash in the top right hand corner of the screen. When Windows starts booting there are 3 Dashes in a row in the top left to middle of the screen. Windows boots fine though. Just wondering what it means. Any help would be nice.

Type "msconfig" in the run box and select the "Boot"

tab. If you have a check mark in the "No GUI boot" selection box, remove the check.
Click "apply" then "OK".
Close the msconfig window and reboot-that should take care of it.