Heroes of Newerth

Hy, i’m currently using suse 11.2 x64 and playing HON. My system is Phenom 940, nvidia 8800gt, 4gb ramm and i placed a 8gb swap file system. Problem is when i play HON that althou the fps is above 60 the game moves porly. I’ve read somewhere that i should increase the memory given to the application but i have no ideea how to do that. I use the x64 version SUSE and the x64 executable for HON.