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Increase Grand Theft Auto IV Speed on your PC The Minimum Requirements for Grand Theft Auto IV Are:
The Recommended Requirements for Grand Theft Auto IV Are:
If you are having missing textures or super lagg (2-10 FPS), i can make it playeable for you.
The process of boosting GTA 4's performance is divided into 8 Steps
1. Overclock Your CPU:
You can overclock your CPU and get some good performace including some Mhz. But Beware, CPU overclocking needs to be used carefully and it makes CPU to produce more heat so you will need a cooling fan. The Article related to "How To Overclock your CPU" can be found here http://www.wikihow.com/Overclock-a-PC. I've increase my Processor Speed from 2.5 GHz to 2.66 GHz.
2. Overclock your Graphics card:
You can also use to overclock your Graphics card and get some good performance. You will need RivaTuner For it. But remember,excessive overclocking can damage your hardware and it is not covered under warranty. You need to increase GPU clock to a few notches (5-10) GHz.
3. Optimize your PC:
For better performance, you will need to optimize PC and remove viruses+malware etc. You need CCleaner to Clean unwanted contents. A good defragmention is also neccessary. You need to clean the registery too (make a backup before doing that). You can also set visual Effect quality to low and set none wallpaper.
4. Low number of background processes:
For good performance and less lagg, you have to make sure about the resource avaliability to play GTA 4. Turn off your antivirus and other applications that can disturb your Gaming Performance. You can use task manager for terminating Unwanted processes (Be careful! Don't end every process!)
5. Updating your Game is important:
Be sure to update your game to the latest version, the latest version allows you to set more graphics options. It can lower your Graphics mem usage to 10 MB. The patch has the bug fixes.
6. What About Your Graphics card? it needs Update:
Make sure to update your graphics card drivers to latest version, for nVidia users: You can download the Latest Forceware and for Ati users: You will need ATI catalyst Drivers. Both of them can be downloaded at FileHippo.com - Download Free Software . These updates have the missing texture fixes and more than 14% game improvement.
7.Use More softwares:
Utilities avaliable on internet can help you to play the game more faster. some of them are PGware GameGain and MemTurbo 4. Memturbo 4 can be used for RAM defragmention.
---- ALL OF THESE DOESN'T WORK? TRY THIS ONE-----
8. Manually change resolution:
If you can't play it at good speeds, the best way is to create a resolution your self. You can create a custom resolution in NVCPanel (only nvidia). Try to create a lowest resolution, for example : 320X240 (if supported). When you are finished creating a resolution, create a file named "commandline.txt" in your Grand Theft Auto IV Folder and place following lines in it (without "") "-width 320 -height 240 -noprecache -nomemrestrict -norestrictions -minspecaudio".
Remember to create a resoltution. If this doesn't works, you can add "-windowed" (without "") in the commandline.txt file. I run this game @ 160x120 and now i get 20+ FPS (before it was 2 FPS). You can set windows resolution to low to increase the GTA IV windows size.
Hope this helps!
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Originally Posted by gaggan4392 
