Crash when the game use 6gb of ram

[ZaltysZ]

Originally Posted by Fabracher

Thinking we hypothesized that because the 32-bit game, where use exceeds 3GB of RAM (the maximum amount which is run by 32-bit Windows) that occurs here is the error that leads to the block.

32 bit application has these memory limits on 64 bit Windows: 2GB without LAA bit, 4GB with LAA bit. 3GB is max available on tweaked 32 bit Windows.

Maybe you are always trying to record a flight in MP? There is a bug, because of which game crashes after few minutes if you are recording in MP.
If not, try flying on lowest settings in MP. Check if that has effect on your problem. Also, insufficient pagefile (Windows swap file) can cause freezes in CoD (even if you have plenty of RAM). If you have it disabled, enable it.