Can Windows Vista PC handle 2000 GB memory?

No.

Windows Vista's physical memory limits are 4 GB (for 32-bit) and 128 GB (for 64-bit) for the Ultimate version.


Here are the memory limits for some versions of Vista:

32-bits

  • Windows Vista Ultimate: 4 GB
  • Windows Vista Enterprise: 4 GB
  • Windows Vista Business: 4 GB
  • Windows Vista Home Premium: 4 GB
  • Windows Vista Home Basic: 4 GB
  • Windows Vista Starter: 1 GB

64-bits
  • Windows Vista Ultimate: 128 GB
  • Windows Vista Enterprise: 128 GB
  • Windows Vista Business: 128 GB
  • Windows Vista Home Premium: 16 GB
  • Windows Vista Home Basic: 8 GB
  • Windows Vista Starter: N/A