Rotating monitor's display

[FunWithFire]

I am looking to put together a vertical display bartop cab. So I started putting the pc together for it. I just put an e-GeForce FX 5200 video card with 128mb in and fired it up. The card came with a control panel program that will rotate the display for you. The problem is that when the display is rotated 90 degrees, the video gets a little choppy. Nothing serious, but you can tell when playing a game like Arkanoid. The paddle just doesn't move as smooth. You can even notice when doing things like dragging a window, or opening a menu.
Is there another, better, option for rotating the display? Should I just run Windows horizontal and then just have Mala run vertically? Can that even be done?
Thanks in advance for your help.

[captbaritone]

I am not sure about mame for windows, but xmame for linux has an option where it will rotate cocktail games automatically. It also has options that will simply rotate any game.

[FunWithFire]

That would probably work out for the MAME games, but I was hoping to have some VP games on the bartop as well, and I don't know if Mala will rotate those. Would a higher memory card help? Possibly go with a 256 over a 128?

[FunWithFire]

I switched out the video card for a different 128 card I had laying around, and this one works fine while rotated. I guess there is a difference between brands.