Win7 64-bit available memory

Windows 7 Home Basic 64-bit (win7 Home 64-bit) 8G

Windows 7 Home Premium (win7 Home Premium 64-bit) 64-bit 192GB

Enterprise edition 64-bit and flagship edition 64-bit support 192GB.

The memory module or motherboard may be incompatible.

The maximum memory is not 2 to the 64th power. Win764 bits use 64 address lines. Theoretically, the maximum memory that can be recognized is 2 to the 64th power B, that is,171798 69184 GB. However, it is impossible to use such a large memory capacity at present, so the 64-bit system of Win7 will not allow computers to support such a large memory when developing.