Unrecognized Graphics and Resolution

I installed some Steam games and BF3 onto my recently bootcamped iMac and the games tell me that my video card is inadequate. I flew over to CanYouRunIt? and everything checks out except for my "Dedicated Video Ram" which apparently I have 0.
I also can't get the right screen resolution for my 21.5" iMac. The maximum available resolution is 1440 x 1050 while my screen is 1920 x 1080.
My computer's specs are as follows:
3.60 GHz Intel Core i5
4 GB DDR3 RAM
ATI Radeon HD 5670 512 MB Graphics Card
When looking through my System Info for my graphics, much of the information is "not available". My guess is the drivers are out of whack but even after updating those, nothing changes.

Resolution, Graphics, and Audio issues have been resolved. Here's what I did:
GRAPHICS SOLUTION (by ineidzcode)
Uninstall Old Drivers using CCleaner
Download CCleaner
Shutdown ALL Catalyst Processes
Right click on toolbar
Click "Start Task Manager"
Drag open the "Description Pane" to easily identify any Catalyst processes running
Right click all Catalyst processes and click "End Process"
Run CCleaner
Select Tools
Uninstall tab
Uninstall "AMD Catalyst Installer Manager"
Delete AMD/ATI FoldersMy Computer -> C: (windows install) -> Delete any AMD/ATI folders that relate to your display drivers...->Program Files (x86) -> Delete any AMD/ATI folders that relate to your display drivers
Remove current drivers
Control Panel -> Device Manager
Open "Display Adapters"
Right click on "AMD Radeon HD * (Your Card)windows did not recognize my graphics card at this point so follow the steps and select "Standard VGA Adapter"
Click "Uninstall"
Then
Restart your computer
Install Beta Catalyst Drivers
Download Beta Drivers
Open Download folder
Double click "amd_catalyst_12.1_preview_windows_vista_7.exe  "
Walk through install wizard
Restart your computer
When you boot into Windows your resolution should be the immediate change (from your previous setting to the monitor's native resolution. Mine was 1440x1050 and changed to 1920x1080.
Try booting up a game and everything should be fine. The guide above was originally published by a SWTOR forum user "ineidzcode" (http://www.swtor.com/community/showthread.php?t=105045).
IF YOU'RE EXPERIENCING LOW FPS... (once again from ineidzcode)
I didn't have to do this on my 2011 21.5" iMac.
Download 1 (AMD Boot Camp Drivers)*:
http://support.amd.com/us/gpudownloa...camp-win7.aspx
Download 2 (Newest Catalyst Release)*:
http://support.amd.com/us/gpudownloa...b_win7-64.aspx
*These downloads are for my setup.  Radeon HD 6770M on Windows 7 64 bit.  To find your downloads, visit here. First install is your setup using MAC Graphics as a system (Step 1) and Boot Camp as a product (Step 2) followed by your card specifics. Second download is your selection as if you were on a native PC with Windows.
After you have downloaded the drivers you need, follow these instructions:
Uninstall drivers Boot Camp installed
Control Panel -> Device Manager
Drop down "Display Adapters"
Right click "AMD Radeon HD 6770M" (or your AMD card) and select "Uninstall".
Restart
Install Boot Camp Display Drivers
Unzip your Boot Camp Display Drivers
Control Panel -> Device Manager
Drop down "Display Adapters"
Right click "VGA Adapater" (adapter name may vary)
Select "Update Driver Software"
Select "Browse my computer for driver software"
Navigate to your unzipped folder of the Boot Camp Display Drivers (my location was: Downloads\8.812-110104a-112011C-Apple.4-Win7Vista\8.812-110104a-112011C-Apple.4 -Win7Vista
Make sure "Include subfolders" is checked and hit Next
After Windows finishes the install, restart your computer (if it doesn't ask).
Install Catalyst Mobility
Simply install the "Catalyst Mobility Suite" (the latest drivers released from AMD, Download 2) and you should no longer get the error you were seeing before.
AUDIO FIX
I experienced zero audio output from my iMac's speakers with limited output using headphones.
Insert the installer disc for Snow Leopard while in Windows
Open the "Bootcamp" folder
Open the "Drivers" folder
Open the "Cirrus" folder
Double click and install the "CirrusAudioVista64" driver (or what is applicable to your system)
Restart your computer
If these steps don't work, uninstall the current driver by going to your Device Manager in Control Panel.

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