Good Ram, 4 stars, however, because it is advertised with 1066MHz but standard 800 Mhz sind.Bei wrong adjustment under 1066MHz caused blue screens, but they are with adaptation to the correct voltage behoben.Bei Timming 5-5-5-15 / 2.2-2.3 V under 1066MHz run properly. CONCLUSION: For connoisseurs Super, for non-innovators rather using.