I was able to fix the DisplayPort issue by updating the Bios. There were not a lot of good clear instructions though so I thought I would post them here.
Go here to make a
Bootable USB flash drive
Download the
ATIFlash tool
Download this
ATI Bios 103 update file.
Once you create the bootable USB thumb drive.
Copy all of the Dos System Files from the USB_Boot folder on to your thumb drive. Rename the ATI.HD5870.1024.091112.bin file to something smaller like atinew.bin and put it and the atiflash.exe on the thumb drive.
Configure your motherboard bios to boot from the usb drive.
type "atiflash -i" to get your device id and replace 0 in my examples if needed
type "atiflash -s 0 atiold.bin" to save your current bios
type "atiflash -p 0 atinew.bin" to flash your bios with the new file
reboot and enjoy flicker free gaming