Maybe I'm off base and, I don't know where you find what card GTA4 thinks you are running, but GTA4 has a problem with cards that have more than 1GB VRAM (drap port that it is). The game thinks my HD7970 has only about 200+ MB VRAM.
Quote from Rockstar follows - (the Steam version instructions are at the bottom)
Create a text file named ‘commandline.txt’ in the main GTAIV folder and put the following statement inside it:
If that doesn't work, try increasing the number to one of the following.
-availablevidmem 6.0 ( I used the value of 6.0)
Note that these command lines can be added immediately after the last quotation mark in the target parameter of the program shortcut.
- Locate the shortcut to the video game on your desktop.
- Right click the file and select Properties.
- Under the shortcut tab, you will see an area that says Target, this will list the exact location of the file within quotation marks.
- Modify the Target adding the command line variables after the last quotation mark.
- Press apply and start your game via the shortcut.
If you are using Steam, please try:
Properties of game>Launch Options>Add: -nomemrestrict -norestrictions
-Now if AMD/ATI could develop an AA that works in the game as well as Nvidia's FXAA, or works at all in this and some other AA deficent games, I'd be a lot happier.
07:11 AM by