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Bad graphics with Radeon HD 6870

November 18, 2012 2:00:15 PM

I built a PC this past week. As I installed the OS, everything seems to be running smoothly, but soon I realized a problem: the video quality is very bad. Although I bought Win 7 64bit, the graphics make it seem like if I was running on 8 bits. This applies to user interface as well as videos: when I test played the wildlife video that came with Win 7, the shadows were unrealistic and edges aliased terribly. I made sure the setting is 1080p I am fully aware that my Samsung 1080p TV has no problem handling my current settings. I would like your help to find out where the problem could be. Will I be able to solve it through software installation/change of settings, or is this a hardware compatibility issue?
My spec:
GPU: XFX HD-687A-ZHFC Radeon HD 6870 1GB 256-bit GDDR5 (drivers fully installed)
CPU: AMD FX-6200 Zambezi 3.8GHz
MOBO: GIGABYTE GA-990FXA-UD3 (drivers fully installed)
RAM: Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866
SSD: Crucial 64 GB m4
HDD: Western Digital Caviar Blue 500 GB
OS: Windows 7 Home Premium SP1 64bit
Display: Samsung SyncMaster B2430HD (connected to GPU with a mediabridge HDMI cord)
Thanks for replying in advance!