Sum rate for AIR and CIR systems for a Network Coding group with = 5 nodes. Variable rate nonbinary LDPC codes with 64 QAM modulation have been used. The high values of the rates are due to NC gain. We see how AIR system gains about 2 bits/channel use in the higher SNR range. It is interesting to note that almost the same gain has been calculated in Section 5 when considering the average achievable rates for CIR and AIR systems with the same number of nodes at lower SNRs.