Hi,
If you don't have only enable password, you can log in through web (GUI), it will bypass the enable password. you have 2 more options to get the memory information,
1. reset the password with, login : password, password : forgetme!
2. Console the controller over serial port and reboot and monitor the POST messages, it will display memory information.
For your ref :
Please feel free for any further query on this.