wtf_man wrote on Mar 12, 2014, 14:40:
A 32-Bit Windows OS only addresses 3 to 3.5GB depending on how much it has to reserve for system drivers.

No, actually a 32 bit OS CAN simply address 4GB of memory address space. What everyone always seems to forget is that your graphics memory (yes, even that on a dedicated GPU) has to be addressed by that same controller.

So it's nothing to do with system drivers. It just has to do with how much memory you have on your GPU. You can even easily test it. Just swap out the 512MB card with a 2GB one, and watch how your available system memory plummets.

But in any case, no matter how many processes or threads or CLOUD MAJICS! it uses, a 32 Bit OS can never address things beyond 4 GB of memory. Ergo, (Latin!), the minimum of 6 means it's going to require a 64 bit OS (even if the executable might still just be 32 bit.)