I was harvesting parts from a computer, and I found a couple gigs of RAM. I could always use a couple more gigs, but I don't know if they are compatible -- and I do know that if they are incompatible, it won't work. But, exactly what do I risk by trying it out? Will the system just not boot, so I take it out and it's as if nothing ever happened? Or will attempting such an installation actually result in permanent damage to my system if it's not compatible?