3D speed

I'm in the process of writing a simple game using 3D graphics modes. My PC is Athlon 2.1Ghz with Geforce 4, and everything is timed to operate with that.

I've just tested the game with a P4 1.7Ghz with a geforce 2 MX and I was surprised by how much slower it is.

I want the game to run at a similar speed on different specs of machines, so I need some advice on how to check this and then code it into the game.

I was using a game loop to include
renderworld and updateworld after moving entities, then at the end of the loop using just Flip.

I found that Flip 0 speeds it up a bit.

I was also going to do a simple for-next loop at the start of the game to test the processor, and then factor in a delay if the processor is too fast, but the two machines I tested end up with similar results, so it must be the graphics card that is causing the drastic difference in performance.

Any ideas on:

1. How to test the graphics performance(speed of machine) in a way that is transparent to the user so I can factor in the correct delay.

2. Is there a better way of doing the in game loop to keep it level for all machines?

Thanks

1) Forget it, it's a wrong way to do this...

2) http://www.blitzcoder.com/cgi-bin/articles/show_article.pl?f=gamemorduun03212002.html

thanks Mustang, I'll go over it in the morning. Never had this problem with the C64!! lol

Or this:
http://www.blitzbasic.com/codearcs/codearcs.php?code=9

Andy