Area-51m, intermittent freezing

Hi all,

I recently bought a new Area 51m, my issue is every now and then it freezes for 5-10 seconds and then continues on as normal, doesn't matter if a mouse or just the track pad. I recently changed out the ram but it did it with the stock ram and the new. I'm at a bit of a loss why it does it at all, not a big deal but still annoying. any help would be appreciated.