Lenovo quitely launches its new IdeaPad U550 notebook PC. Boosted by Intel CULV , the U550 is running the latest Windows 7 Home Premium 64-bit OS. Certain models will also get WiMAX support. Two models are available. The IdeaPad U550-374955U is boosted by Core 2 Duo SU7300 1.3GHz processor, 4GB of DDR3 memory and ATI Radeon HD4330 graphics card with 512MB video RAM. It packs a 320GB hard drive. On the other hand, IdeaPad U550-37495EU sports Pentium Dual Core SU1400 1.3GHz CPU, 3GB of RAM,