However, limitations and errors can increase, so let’s just say that 32 bit is supported by up to a maximum of 4Gb of RAM. Here we say 32 bit RAM 4 Gb, but our OS does not get full 4 Gb RAM. For example, if a video card uses 1Gb of RAM, the RAM for our Windows OS will be less. On the 64bit system (Home edition), on the other hand, you can use up to 16Gb of RAM. In the Ultimate and professional version, you can increase the amount of RAM up to 192Gb. It has the same video card and 32-bit performance as the RAM, so you can use it without having to run out of RAM. Another thing is that 32-bit software can run on 64-bit systems.