1. Background
Microsoft
OMSI is a 32Bit program and can have a maximum of 2GB in "normal operation" - the rest is reserved (for 32Bit applications) for the operating system. Even if the system has more than 4GB RAM, the RAM available to OMSI is automatically limited to 2GB by the operating system. Especially with large cards with many lines and extensive AI traffic, the computing power is artificially limited here.
The 4GB patch is an external tool that ensures that a 32-bit program (as the name already suggests) can now be allocated 4GB instead of 2GB. In the context of OMSI this means that OMSI may use a maximum of 4GB.
2. The technology behind it
The small tool modifies the so-called Large-Address-AwareFlag in the .exe file. This flag tells the operating system that this program is able to manage up to 4GB of memory. For OMSI there are no known negative side effects when setting the flag, so that we strongly recommend the use for large maps.
Installation
The installation is very easy and also possible for laymen.
- First you have to download the 4GB-patch from here.
- The .exe file in the archive is ideally stored directly in the OMSI main directory, but can also be placed anywhere.
- To apply the 4GB patch to OMSI, there are the following possibilities:
- Start the 4GB patch as administrator, then a window will open where the Omsi.exe is selected.
- Drag the Omsi.exe to the 4gb_patch.exe
4. A dialogue box then confirms that the action has been successfully completed.
An Omsi.exe.backup is also automatically created, which can be renamed back to Omsi.exe if necessary (e.g. problems) and thus the original file can be restored.
3. Pitfalls
The 4GB patch directly manipulates the .exe file that OMSI executes. This has the consequence that the 4GB setting is lost with every Steam update from OMSI or a Steam error check. The 4GB patch must be reinstalled in this case.
4. Further links and discussions
Attention all links lead to German language pages!
