The Open Access Center (APC) "HPC Saulėtekis" is a high-performance computer designated for Lithuanian and international scientific research. The performance achieved for scientific calculations without GPU on the HPLinpack test is 0.27 PFlops with 15 TB RAM. GPU performance changes to 2 times 0.1 PFlops. The center enables the solution of extremely complex problems in materials science, quantum chemistry, astrophysics, and tasks requiring up to 40 qubits in quantum information, as well as participation in international projects.