There are 2 applicable options in your torrc:
RelayBandwidthRate MaxAdvertisedBandwidth
The former actually throttles your traffic; the latter does not. Both may be omitted. The lower of the two is what you should see in Globe or Atlas. MaxAdvertisedBandwidth should not be higher than RelayBandwidthRate.
Many thanks for the clarification. :-)
Regards
Gabor