I have followed most of the tips already available. One host shut me down for high cpu usage and the next one is closing soon. I have high cpu usage when there are like 4 users online! I have tried to remove modules etc., I have enabled gzip, memchache and eaccelerator. Removed simple messenger and chat but still no joy. I am currently on a large VPS with 4GB RAM. Ram usage is little 280MB but CPU is high. I have tried everything I can search for... before I switch to IPBoard Suite or vBulletin Suite - anyone else with similar problems who have resolved the issue?