Final Thoughts. The Acer XB270HU was long overdue in terms of an IPS G-Sync display-something many gamers have been waiting for since G-Sync was announced. While the longer pixel response time precludes 3D Vision support, this panel is still capable of an impressive 144Hz maximum refresh rate at full 1440P resolution.inal Thoughts. The Acer XB270HU was long overdue in terms of an IPS G-Sync display-something many gamers have been waiting for since G-Sync was announced. While the longer pixel response time precludes 3D Vision support, this panel is still capable of an impressive 144Hz maximum refresh rate at full 1440P resolution.