I have a fairly aged Pentium 4, RAID, desktop computer with Fed 11. I started off with the 686 PAE kernel and update it whenever the update software tells me to. Some time ago I downloaded an NVidia driver which said it needed the 586 kernel so I installed that as well. I then uninstalled the NVidia driver as it caused some minorish problems without any improvement to the graphics.
The bottom line is I now have the last three 686 kernels and the last three 586 kernels, which I'm pretty sure I don't need. The machine seems to run fine whichever I use with no discerable differences.
My questions are, what is the difference between the two types, which should I actually use and how do I get rid of the other. It would at the very least reduce bandwidth use when updating.