Help setting X refresh rate on Dell Flat Panel

I am having a problem changing the refresh rate on my monitor. Its at 60Hz by default which is makes stuff kind of blurry.

I have recently upgraded to a flat panel LCD monitor which is a Dell
E150FP. I am using an integrated ProSavageDDR (ProSavage8+) video card
that comes with the MSI MS-6390 motherboard. I am forced to use the Vesa
driver (can this be the cause of my problems?) because of the lack of
support for this card.

Red Hat 8.0 Auto-Detects my monitor as Dell E151FP which is pretty much
the same thing as my E150FP.

This is the XF86Config file as generated by Red Hat (the display part):
--------BEGIN XF86Config---------------

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Dell E151FP"
DisplaySize 310 230
HorizSync 31.0 - 60.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Device"
# no known options
#BusID
Identifier "VESA driver (generic)"
Driver "vesa"
VendorName "VESA driver (generic)"
BoardName "VESA driver (generic)"
EndSection

Section "Screen"
Identifier "Screen0"
Device "VESA driver (generic)"
Monitor "Monitor0"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "DRI"
Mode 0666
EndSection

----------END----------------------

The refresh rate keeps being 60Hz, no matter what I do. If I change the
"VertRefresh" to be just "75", it still stays 60. By the way, I know the
refresh rate is 60Hz because the little monitor settings menu says
"1024x768 @ 60.03Hz" (the one on the actual monitor). It's like despite
everything it just REFUSES to change it's refresh rate.

This exact setup runs at 75Hz just fine in Windows XP, so I know it can.

Can this be a video card issue?

Any ideas as to what I can do to get to 75Hz so my eyes stop hurting from
this blurriness?