I assume these are your boards?

http://bobdunsire.com/cgi-bin/ultimatebb.cgi

You're generally following the guidelines as far as limits go... Each forum should have only a few thousand topics within it - the posts don't count, just the topics. The Beer Tent forum is a bit on the large side, though.

You also only have a few thousand registered users...

I notice you aren't using the Accelerator. Turning that on will increase performance greatly. A quick peek at the test script seems to indicate that you don't have PHP installed. You'll need to get that fixed. <img src="https://www.ubbcentral.com/boards/images/graemlins/wink.gif" alt="" />

Once you have enabled the Accelerator, go into the Forum Settings for each forum, and force each forum to Show All Topics. This will increase cache hits quite a bit (thus improving performance), at the cost of a little bandwidth.

How many pageviews did the board receive last month according to the control panel? If you don't recall, what's the current figure? (Yes, it's been only a day or two, but we can guestimate traffic from there...)

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