Sudden issue - can't use 2048mb of memory using a mem switch command for game

qballbandit

Distinguished
Jun 30, 2010
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18,510
Good day,
I am an avid Microsoft Trainsim user (probably not too popular here, I'd suspect), and because of the old/flawed design, it is more CPU intensive, than GPU. Because of this, I have used a mem switch command in the properties of the .exe for the sim, "-mem:2048", to force it to allocate this value. ( I have 4gig ddr installed, on an older AMD Phenom II/ASUS mobo/Win7 Ultimate machine)
Suddenly, the game will not accept the 2048 value, nor a 1024, value - but it will accept 512.
My memory is defragged/cache-cleared automatically prior to the game starting, based on an autostart app I use that shuts down Windows bloat first, before executing the game program.
Looking at task manager, there is the expected norm of available/cached/ total memory displayed.
I have run the MS/Windows memory checker, and it reports back no errors, so I am not yet convinced it's a module or mobo issue, but.....
Would like to hear from the more knowledgeable: opinions, suggestions, solutions, and I extend a hearty thank you up front.

Best,

Neil