  We study the influence of Gribov copies on gluon and ghost propagators,
evaluated numerically in pure SU(2) lattice gauge theory in the minimal Landau
gauge. Simulations are done at four different values of $\beta$ (namely $\beta$
= 0, 0.8, 1.6 and 2.7) and for volumes up to $16^4$ (up to $24^4$ at $\beta$ =
1.6). For the gluon propagator, Gribov noise seems to be of the order of
magnitude of the numerical accuracy, even at very small values of the coupling
$\beta$. On the contrary, for the ghost propagator, Gribov noise is clearly
observable for the three values of $\beta$ in the strong-coupling regime. In
particular, data corresponding to the minimal Landau gauge are always smaller
than those obtained in a generic Landau gauge. This result can be qualitatively
explained.
