Sony Vaio U series

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.

The brightness of the internal display is adjustable. The brightness control has nine levels, and also the ability to turn the backlight off in direct sunlight.

The display is very small, roughly 5 inches (127 mm) diagonal; it may cause some eyestrain if it used for prolonged periods. The high DPI resolution offers excellent viewing of images and video.

Sony VGP-KBC1 Foldable Keyboard, The compact USB keyboard resembles a laptop keyboard. It folds in the middle, and has a TrackStik mouse pointer in the center. When folded, the unit is approximately the same width and height of the U-series unit, and about half the thickness. Original U50 and U70p units had a faulty Synaptics driver which sometimes caused USB HID input device conflicts. Recent driver updates have resolved this issue.

The pointing-head is on the right side of the unit below the directional pad. The mouse buttons are on the left side of the unit, no matter what orientation it is used in. When rotated into portrait mode, the options key, brightness, and onscreen keyboard button are remapped to the mouse buttons, and the previous mouse buttons become the new modifier buttons.

The TrackStick has a rubber tip that can be worn out after repeated use. You can get a replacement tip from Sony parts.

This slot will accommodate a Type-II CompactFlash device, provided there are Windows XP drivers for such a device. It will accept all valid CompactFlash memory cards. Some memory cards pulled from sealed MP3 devices such as iPods have been crippled as so not to be fully compliant as a regular memory card, and may not work.

The Sony Memory Stick slot is underneath the CompactFlash slot. It will accept only Memory Stick memory storage cards; Wi-Fi and Bluetooth cards will not work as there are no Windows XP drivers for any such Memory Stick IO devices at this time.

There is one headset connector on the left hand side of the unit, above the button-hold switch. It also has an extended port for a headphone remote control unit, which allows one to control audio playback and read current track information. There are a couple extensions available to allow Windows Media Player and Winamp to display output to the controller unit.

There are two OEM batteries available, and now some aftermarket enhanced models. The stock one that comes with all units lasts approximately two to three hours, depending on usage. An extended battery is available as an option, is about twice the thickness of the stock battery, and lasts approximately twice as long as the stock battery.

The iGo Juice and other third party adapter manufacturers make power supplies that are compatible with the U series. The power tip is compatible with many other Sony models, including the Z505, and possibly some Fujitsu models. Please check voltage, current and power ratings to ensure maximum compatibility.

On all models, the memory is on a proprietary daughtercard manufactured by Sony. This card has a proprietary interface, and is incompatible with all currently known memory cards. The memory is DDR 266 MHz. On models with 512 MB, the memory is maxed out. On models with 256 MB, the memory card can be removed and replaced with a 512 MB card, currently only available in Japan, but occasionally rarely found in the United States, and usually at extremely high prices.

Since the U series uses a proprietary memory module and not a standard SODIMM, if a vendor claims to have U-series RAM for sale and it is a SODIMM, it will not fit in the U series. There are various vendors claiming to sell U-series RAM but the vast majority are selling incompatible DDR SODIMM. There has been no report of modules larger than 512MB as of August 2014.

i.Link is Sony's name for IEEE 1394; the port is compatible with 4 pin FireWire cables, and is unpowered. 6 pin firewire cables will need an adapter. The i.Link port on the docking station additionally has a power jack next to the 4 pin jack, used only for Sony compatible CD and DVD drives. Only drives compatible with this extended power jack are capable of booting CDs and DVDs on the U series. Other drives may work once booted into the OS, but will not boot setup CDs or DVDs. There are at least four Sony drives that will work: PCGA-CRWD2, PCGA-DVRW1, PCVA-DRW3, and PCGA-DVD1/A.

(Note that the Sony DRX-510UL drive can be used to read/write discs once Windows has booted, but the red text halfway down the page says specifically, "The DRX-510UL cannot handle [i.e., be used for] system recovery (the reinstallation of the OS).")