With that kernel, I would attempt to compile Xfree86. It's not a kernel issue, but a userland(XF86) issue.
www.xfree86.org. With redhat linux you can recompile the src rpms by doing: rpm --rebuild *.src.rpm.
www.rpmfind.net for the newest version. Install the compiled binaries, reboot, and set your display. Your card and monitor are well supported.