EverQuest is moving into the 64-bit era finally as its servers and clients make the jump next week. Coming on February 15th, the move will allow Darkpaw's devs to open the tap on the amount of memory your client and the server can utilize.
Here is what you need to know for TERA's switch to their 64-bit client, including the update system requirements.
In case you missed it, TERA is migrating from a 32-bit to a 64-bit client at the beginning of August. Here's what you need to know.