In the realm of forthcoming wireless communication systems, various technologies have emerged, with intelligent reflective surfaces (IRSs) standing out as a promising contender for enhancing spectral and energy efficiency. The effectiveness of such systems is significantly influenced by the nonlinear characteristics inherent in their components. This study examines the collective impact of nonlinearity stemming from memory effects in high-power amplifiers (HPAs) and phase noise at IRS on an orthogonal frequency division multiplexing (OFDM) signal, aiming to assess the performance of a communication system augmented by IRS. This work presents mathematical expressions for determining the outage probability (OP), spectral efficiency (SE), and energy efficiency (EE) in an OFDM communication system aided by an IRS, considering the effects of non-ideal HPA and phase noise in the IRS. We validate our analytical results through comparison with simulations, confirming the accuracy of our approach. Our findings highlight the significant impact of HPA nonlinearity and IRS phase noise on the performance of an OFDM communication system assisted by an IRS.