I had a recent string of bad luck and a couple of SODIMMs. I finally had the good sense to purchase a grounding strap/wristband. I've been opening up the case on my computer and clipping to the chassis while it's still plugged in (but turned off). I would like to know if cliping it to anything metal--like a filing cabinet--is sufficient or does the metal have to be grounded. I don't really understand 'lectricity a whole lot.