Sonic CD's minimum requirement is 8 Megabytes of RAM, which is a VERY small amount.
Windows XP does not have the RAM, its the computer that has it. The amount of RAM can differ for each computer.
about 3gb of ram is recommended for windows 7 starter.
To run windows 7 you need at least 4gb of ram
Windows XP can never "run like Windows 7", regardless of the amount of RAM installed.
64 MB.
dxdiag.exe
At least 64 MB, but 512 or more is recommended.
No. Windows XP Professional requires at least 128MB of RAM. (Official claims are that it will run on 64MB, but some features won't be available and performance will be near-unusable.)
You can run Windows 7 with 1-2 GB of RAM depending on what you are doing. (More stuff you need more RAM) I Would go with at least 4 if not 8 GB of RAM to run Windows 7.
You can check the ram of any Windows computer by holding the windows key and pressing the pause break key on the top-right of the keyboard
The maximum amount of RAM supported by Vista is 128 Gb (Ultimate, Enterprise and Business).
Your RAM isn't needed, there's nothing to fill it with. RAM is temporary storage, which is used when you have multiple applications running, or using applications which require large amounts of RAM, eg. Games and Video Editing software.