The memory on a CP 201i can not be upgraded. Depending on the version of CP, if you are having CPU usage issues, you probabaly have a memory leak. Do you have any other software on the server other than what came with the server? If so, I would remove it and reboot the server and see how long it takes to start acting up again. Also, make sure you have the lates PEPs loaded for the version of CP you have.