Currently we are in the process of testing our iterative solvers (BICGSTAB and CG) with or without preconditioners. The tests are being performed on the same benchmark set of matrices and will include the following tests: for a given matrix we will measure the performance (GFLOPS and speed-up) as a function of iterations that are needed to find a stable solution. The results will be compared to standard CPU implementation of the mentioned solvers, for example in MKL library.