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AIMS: A few well studied cataclysmic variables (CVs) have shown discretecharacteristic frequencies of fast variability; the most prominent ones arearound log(f/Hz) $\simeq$ -3. Because we still have only small numberstatistics, we obtained a new observation to test whether this is a generalcharacteristic of CVs, especially if mass transfer occurs at a high ratetypical for dwarf nova in outbursts, in the so called "high state". METHODS: Weanalyzed optical Kepler data of the quiescent nova and intermediate polar V4743Sgr. This system hosts a white dwarf accreting through a disk in the highstate. We calculated the power density spectra, and searched for break orcharacteristic frequencies. Our goal is to assess whether the mHz frequency ofthe flickering is a general characteristic. RESULTS: V4743 Sgr has a clearbreak frequency at log(f/Hz) $\simeq$ -3. This detection increases theprobability that the mHz characteristic frequency is a general feature of CVsin the high state, from 69% to 91%. Furthermore, we propose the possibilitythat the variability is generated by similar mechanism as in the nova-likesystem MV Lyr, which would make V4743 Sgr unique.

Searching for the 1 mHz variability in the flickering of V4743 Sgr: a Cataclysmic Variable accreting at a high rate