If you can post the exact model of your monitor, we can see if we can find the refresh rates with Google. Also, go to
Nvidia and see if there are 3D drivers available for your card.
With "hands on" distros like Slackware, you have to sometimes make it use the resolution you want. You'll want to look at your xorg,conf file. I presume you installed KDE? You can open it as su like this:
Code:
kdesu kate /etc/X11/xorg.conf
(Be careful. As "su" the changes you make and save will be written!) At the bottom of xorg.conf, you'll see a section similar (but not exactly like) this:
Code:
Section "Device"
Identifier "Nvidia 7300"
Driver "nvidia"
EndSection
Section "Screen"
Identifier "Screen 1"
Device "CRT Monitor"
Monitor "Dell"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768"
EndSubSection
EndSection This is mine from CRUX. See how the default depth is "24?" See how it corresponds with the bottom sub section that has to do with depth 24? Notice there is only one mode: 1024x768.
Before making changes that could possibly lock you out of a desktop display, I'd get familiar with the "joe" command line editor which is included in Slackware. Joe is easy to use and a life saver when you cannot get into "X." To see usage, do from the command line:
Maybe this will give you some ideas about what to do for yours. Hope it helps.