|PC5000 was only available from a few manufacturer's & was extremely expensive enthusiast's RAM. It's rated to run at 312.5MHz (DDR625). I know when it was 1st released, a 512MB stick sold for well over $200. Are you sure that's what you have? Your friend would be foolish to just give it away.|
It has higher voltage requirements so it may not work in your system, if it does, it will definitely underclock. And of course, if you pair it up with another stick of RAM, it will be forced to run at the speed of the other stick anyway.