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4GB Patcher for older games that require more than 2GB of RAM and crash to desktop 1.0.0

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About This File

Use this tool if you have Windows 64-bit (x64) and wish to patch your older 32-bit (x86) game executables (*.exe files).

This is particularly useful for large and/or modified games that you feel are randomly crashing due to a lack of system memory (RAM).  This has proven to be particularly useful for the Test Drive Unlimited games.

 

Original credit:  https://ntcore.com/?page_id=371

4gb_patch.jpg

Quote

This very little tool patches x86 executables in order to let them have 4GB (instead of only 2) of virtual memory on x64 platforms. This tool comes very handy for applications which need a great amount of virtual memory like games, 3D renderization, multimedia etc. To gain these 2GB, you just have to use this tool to patch the executable (*.exe file) of the software you want to have these additional GBs of virtual memory. It can be used by clicking on it and choosing the file or through command line (e.g.: “4gb_patch file.exe”). It automatically creates a backup copy of the original executable.

Why things are this way on x64 is easy to explain. On x86 applications have 2GB of virtual memory out of 4GB (the other 2GB are reserved for the system). On x64 these two other GB can now be accessed by 32bit applications. In order to achieve this, a flag has to be set in the file’s internal format. This is, of course, very easy for insiders who do it every day with the CFF Explorer. This tool was written because not everybody is an insider, and most probably a lot of people don’t even know that this can be achieved. Even I wouldn’t have written this tool if someone didn’t explicitly ask me to.

 


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