Twinmos has been around for quite a while since the SDRAMs era. But DDR rams have become the most sought after rams for normal users, gamers and overclockers alike. We'll be looking at Twinmos newest line of rams, the Speed Premium. Specification The rams are rated at 2.5-3-3-7, which is acceptable for a DDR400. Voltage of the ram is at 2.6V and the usual lifetime warranty.