Everything turned off, board still slow under very heavy load

[kingston]

I have any and all addons disabled on a decently quick server with a good internet connection and my board is crawling under heavy load. Have 4 gig of ram, fast processer located at a giant database warehouse downtown. What can I do to speed things up?

 

[Fufu]

Are you on a shared host or VPS?

 

[Jake Bunce]

What can I do to speed things up?

APC caching is a good way to speed up your forum:

http://xenforo.com/community/threads/tip-use-apc.6456/

 

[kingston]

APC caching is a good way to speed up your forum:

http://xenforo.com/community/threads/tip-use-apc.6456/

Installed APC, Tried mod_pagespeed. I guess I just can't figure out if my server isn't beefy enough or what? When I look at the diagnostics it doesn't seem like I have full CPU utilization or that all the memory is taken up. Is there a setting I can beef up or something? I have 4 gig and it only ever appears 1.5 gig is used at most.