Max memory limits for 64-bit Windows 7

Start64!While the maximum RAM limit for 32-bit Windows 7 editions is 4GB, when it comes to the 64-bit editions, the amount of memory that the OS can address depends on which edition you are running.

Here are the upper RAM limits for the different editions of Windows 7:

  • Starter: 8GB
  • Home Basic: 8GB
  • Home Premium: 16GB
  • Professional: 192GB
  • Enterprise: 192GB
  • Ultimate: 192GB

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