Okay then, there's an easy way to test for yourself. Remove one. Try to display one of the screenmodes I listed. Does it work, or does it not? Even if it did, I shudder to think how badly something like 1024x768 would flicker without a scandoubler, and that's even assuming you could find a monitor that would sync that low. :p
My Microvitec displays the HighGFX 1024x768, but due to inadequate size controls on the monitor I couldn't get it to entirely fit on the screen. Flickers yes, if using with a CRT you'd certainly need a flicker fixer as it's interlaced.