From many things I have tried I have been lagging LIKE crazy in apb so what I did was I downloaded "bought" IOBIT Advanced System-care Pro and it basically let you switch to different modes like Game-mode it closes programs you don't need on and all of that it even has a thing to fix your computer of dead programs. I suggest trying the trial of it REALLY worth it. Used to lag until I would get zero kills now Im on top SO PLEASE try it I like seeing people being able to play this game also try Can You RUN It | Can I run that game | Game system requirements
It will check any game on your computer to see if you have a what you need to play it So please try it
get a better pc
Copied from APB site: How to up your framerate with config file mod-
Editing the settings
1. Go to your APB programs file folder. For me, it''s in C:\\Program Files\\Realtime Worlds\\APB North America (Mine is in steamapps>commonfiles) Nasty
2. Click on the APBGame folder, then on the Config folder
3. Now click on the APBCompat.ini file and open it with notepad. If it''s read-only, right click on properties and uncheck the box
4. Go to file, save-as and save this file as a backup on your desktop
5. Ctrl-F and search for "BucketX" where X is the graphics slider that you use in-game. 1 being minimal, 2 being low, and so on. I''d imagine that most of you already running on minimal settings though. If you''re still running on high, I''d suggest turning down your graphics slider in game and seeing if that increases your fps. In other words search for bucket.. set stuff to false and make sure options are set to minimal in game (nasty)
6. Set the following values:
Basically, we''re turning off all of the flashy shadows and bloom effects in order to bump up your fps.
Disclaimer
Make these changes at your own risk, it may lead to game instability/crashes. In my experience though, I have been running way smoother than before and have yet to experience a crash (even though my computer is utter shit compared to many of your rigs).
Thanks for reading.
Addendum:
You''re going to have to start APB without the launcher in order to keep your changes. To do so, go back to your APB program files folder, click on the Binaries folder and then click on the APB application in that folder. I would recommend creating a shortcut to this file on your desktop.
The point is so you don't need to get a better pc also ^^^ that also helps