SUBSIM Radio Room Forums - View Single Post - How to make 32 Bit applications aware of more memory: relevant for FS-users

Arclight · 07-14-11, 05:32 AM

Ah, thats another limitation of 32-bit Windows: it can't address more than 4GB of RAM, and that gets split down the middle into user space and kernel space. That's what that /3GB switch does: assign more memory to the user space. With the above tweak it's increased to 2.5GB from 2GB.

Even applications that can use more than 2 GB wouldn't be able to get at it without 'tweaking' the OS since half of the 4GB is reserved.

That /3GB switch can cause trouble, but it shouldn't for the average PC. The thing to really steer clear of is trying to get 32-bit Windows to recognise more than 4GB memory.

07-14-11, 05:32 AM	#4
Arclight Navy Seal Join Date: Jun 2008 Location: Land of windmills, tulips, wooden shoes and cheese. Lots of cheese. Posts: 8,467 Downloads: 53 Uploads: 10	Ah, thats another limitation of 32-bit Windows: it can't address more than 4GB of RAM, and that gets split down the middle into user space and kernel space. That's what that /3GB switch does: assign more memory to the user space. With the above tweak it's increased to 2.5GB from 2GB. Even applications that can use more than 2 GB wouldn't be able to get at it without 'tweaking' the OS since half of the 4GB is reserved. That /3GB switch can cause trouble, but it shouldn't for the average PC. The thing to really steer clear of is trying to get 32-bit Windows to recognise more than 4GB memory. __________________ Contritium praecedit superbia.