Sony U-series
The Sony U-series of subnotebook computers refers to two series of Sony products the PCG-U and the VGN-U . The later VGN-U were, at their release, the smallest independent computers running Windows XP and the most powerful high-end subnotebooks at the time. The VGN-U50 and VGN-U70P models are roughly the size of two DVD cases stacked on top of each other.
The first models of the series to come out were the VGN-U50 and the VGN-U70P in Japan. The American model is the VGN-U750P. A VGN-U8G model was introduced for some south Asian countries.
Additional Specification for VGN-U Series
Other:
The Pentium-M series CPU (1.0 GHz, 1.1 GHz) supports SpeedStep, which allows the processor to slow down when not under load, using less power and prolonging battery life. The 1.1 GHz is a Dothan generation processor, and has a 2 MB cache, whereas the 1.0 GHz is a Banias generation CPU with only 1 MB of cache. The 900 MHz Celeron-M does not support SpeedStep, and has only 512 KB cache. Despite the Celeron-M's performance shortcomings, benchmarks show the arithmetic performance difference is marginal. Much of the performance increase seems to result from having a total of 512 MB of memory. Battery life of the Pentium-M series is said to be anywhere from 30 to 45 minutes over the Celeron-M model as a result of having SpeedStep.
The internal display has a resolution of 800x600 pixels. The integrated i855gm graphics card can display a maximum of 16 million colors. Connecting an external monitor to the VGA port of the docking station enables a maximum resolution of 1600x1200x16m. The graphics supports display cloning or extended desktop when using an extended monitor, and also supports OpenGL and Direct3D hardware acceleration, with a performance approximating that of a Radeon 7000 or a GeForce 1. With updated drivers from Intel, the ability to rotate the screen in 90, 180 and 270 degree modes is enabled.
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