If you're careful, I would say don't use one. Plus, it's cheaper to not use one. I've suggested in the past to use them, but with a fan like the Alpha, the clip is pretty straight forward (unlike using a Golden Orb the first few times...) just be really patient and careful. BTW I've been using 1000/1500/2000 grit wet sand paper (get it nearly mirror finish) on my CPU fans before installing them, and ArticSilver, and have been able to get CPU's which were "stuck" at 933 or 980 mhz up past 1000mhz.