Increase your graphic Card's Dedicated memory virtually

You would be thinking that is it possible to increase your graphic card's virtual memory. Yep, Its possible. If you are a Grand Theft Auto 4 player and having trouble playing the game in full setting then this post is really gonna help you. Its the most useful that we discovered ourselves. It'll not just only boos up the memory but also will give you good FPS in your game.
Follow the steps below to apply the trick-

1- You can download the file & place in your game's folder

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2- Or you can do it manually-

• Make a new .txt file name 'Commandline.txt' in your Documents Folder.
• Now Copy & Pate following text-

-norestrictions 

-nomemrestrict

-availablevidmem 15.4

Note: Change numeric value according to your need.

Place the file in game's folder i.e. by default- "C:\Program Files\Rockstar Games\Grand Theft Auto IV

You are DONE! ENJOY!