by Martin » 11 Dec 2014, 01:07
Personally haven't tested on the Celeron line, but on a 5 year old Core i7 920 it uses around 5% CPU with occasional spikes when tracking is reacquired. On a modern Core i5 desktop the load is around 2% CPU.
The major concern I would have with low-end systems is that some manufacturers cut corners and put on low grade (or old) USB 3.0 controllers which cannot live up to the standard.