My bad, I was before my coffee. One additional thing that wasn't yet mentioned is that freqency depends also on gravitation, so orientation of your motherboard

My bad, I was before my coffee. One additional thing that wasn't yet mentioned is that freqency depends also on gravitation, so orientation of your motherboard could matter (for the curious - https://www.youtube.com/watch?v=zILwgQhjC_Q https://www.youtube.com/watch?v=zILwgQhjC_Q ). I'm not really sure it's big enough to matter though.