Video is terrible in FC6

[linuxmaillists at charter.net]

I have 2 boxes with the same mobo and monitor, different 
video cards. One has ATI radeon 9600 pro and works just 
fine with a CRT or an LCD (both LCD monitors died budget 
currently won't support replacing them). The other ha(s/d) 
an nvidia quadro4 900 xgl, it worked just fine with an LCD 
but with a CRT it only works at 60 refresh rate no matter 
the resolution. Any other refresh rate causes the screen to 
wobble from the second it boots in all screen 
modes(text/GUI). Also the refresh rate gets set back to 85 
when the box boots so I have to set it back to 60.

I swapped the two CRT monitors between the two boxes. (ok, 
not the monitor), used an extra video cable (ok, not the 
cable). Pulled the nvidia card and used an SIS card. (ok, 
not the video card). No change after doing any of these.

Any one have any ideas?

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