ok first is overclocking Ram Really worth it?
but is it safe to overclock my Ram?
Usually not dangerous. Do not exceed 2.2 volts on the RAM voltage. Other than that, if you overdo it, you generally just need to clear the BIOS and start over.
what exactly do you change when overclocking, and do you use a program or the Bios?
The operating frequency of RAM and its timing. Always try to use the BIOS.
do all motherboards and Ram allow overclocking?
Motherboards - no. Some motherboards have locked BIOS settings and can only be overclocked with difficulty if at all. RAM is different. You just plug it in and apply the settings to it. If it works, great. If it doesn't, you try again.
I have looked at the RAM links. One problem with many of them are their age; some are pretty old. I keep putting off commenting on them.
Here's another link where we discuss this: