  We present preliminary results for the determination of the leading strange
and charm quark-connected contributions to the hadronic vacuum polarization
contribution to the muon's g-2. Measurements are performed on the RC*
collaboration's QCD ensembles, with 3+1 flavors of O(a) improved Wilson
fermions and C* boundary conditions. The HVP is computed on a single value of
the lattice spacing and two lattice volumes at unphysical pion mass. In
addition, we compare the signal-to-noise ratio for different lattice
discretizations of the vector current.
