The 3-D stray-field loss of the upgraded benchmark model TEAM P21^e with the two-sided excitation (ADH2) under various complex harmonic and DC-biased magnetization is analyzed by the 3-D fixed-point harmonic-balanced finite element method using parallel computing. The calculated results of the stray-field loss are in good agreement compared to the measured results. It is shown that the AC source has a larger effect on the total stray-field loss than the DC source. The efficiency of the 3-D fixed-point harmonic-balanced method with parallel computing is analyzed and can be potentially improved by 60%.