Practical Opamp integrator problem
The answer is simple: For an ideal opamp your circuit provides a lowpass function with max gain of 40 dB and a cut-off (-3dB) at app. 100kHz. However, the real opamp (GBW=1MHz) allows a gain of 40 dB only up to app. 10kHz. Hence, it is the open loop gain of the opam that dominates and determines the frequency response of the whole circuit (3dB cut-off at app. 10kHz)