System Requirements Lab, the site where you can test in real time if your computer might or not be able to run a game, has added GTA 4 to their list of games.

To test your machine’s ability to run GTA 4, go to their site and select the game from the drop-down list.

Before System Requirements Lab can analyze this computer you need to give your permission to download an ActiveX or Java Plug-in component called SysReqLab.cab or SRLApplet from Husdawg, LLC. For more information about this component, see below. You may need to disable any Pop-up blocker you are using in order to use this service.

http://www.systemrequirementslab.com