  AIMS: A few well studied cataclysmic variables (CVs) have shown discrete
characteristic frequencies of fast variability; the most prominent ones are
around log(f/Hz) $\simeq$ -3. Because we still have only small number
statistics, we obtained a new observation to test whether this is a general
characteristic of CVs, especially if mass transfer occurs at a high rate
typical for dwarf nova in outbursts, in the so called "high state". METHODS: We
analyzed optical Kepler data of the quiescent nova and intermediate polar V4743
Sgr. This system hosts a white dwarf accreting through a disk in the high
state. We calculated the power density spectra, and searched for break or
characteristic frequencies. Our goal is to assess whether the mHz frequency of
the flickering is a general characteristic. RESULTS: V4743 Sgr has a clear
break frequency at log(f/Hz) $\simeq$ -3. This detection increases the
probability that the mHz characteristic frequency is a general feature of CVs
in the high state, from 69% to 91%. Furthermore, we propose the possibility
that the variability is generated by similar mechanism as in the nova-like
system MV Lyr, which would make V4743 Sgr unique.
