DirectCU II : ASUS

ASUS has launched an entire range of DirectCU II-enhanced graphics cards that include the latest technologies from both AMD and NVIDIA GPU rosters. AMD HD 6970 and HD 6950 gets DirectCU II while NVIDIA GTX 580, GTX 570 and new GTX 560 Ti all ship with this advanced cooling technology.

DirectCU II Technology
Based on ASUS DirectCU, which uses copper heat pipes in direct contact with the GPU core for up to 20% cooler performance, DirectCU II adds a custom cooler that uses twin 100mm fans for a massive 600% increase in airflow on HD 6970, HD 6950, GTX 580, and GTX 570 DirectCU II cards. ASUS has also launched the GTX 560 Ti DirectCU II TOP graphics card with dual 80mm fans for the best performance in its segment through doubled air power.

The new DirectCU II graphics cards also include exclusive ASUS Super Alloy Power technology, which uses a unique alloy formula in power components such as chokes, capacitors, POSCAPs and MOSFETs to ensure a 15% performance boost, 35°C cooler operation and 2.5 times longer lifespan. In addition, ASUS overvolting (Dynamic voltage scaling is a power management technique in computer architecture, where the voltage used in a component is increased or decreased, depending upon circumstances. Dynamic voltage scaling to increase voltage is known as Overvolting; dynamic voltage scaling to decrease voltage is known as undervolting. Undervolting is done in order to conserve power, particularly in laptops and other mobile devices, where energy comes from a battery and thus is limited. Overvolting is done in order to increase computer performance, or in rare cases, to increase reliability.) utility Voltage Tweak allows gamers to realize the full potential of their PC’s graphics performance with an easy to use and intuitive user interface.

The newly-arrived GTX 560 Ti DirectCU II graphics card from ASUS uses specially-selected TOP GPUs clocked at 900MHz by default, representing a huge 80MHz overclock over reference. This indulges hardcore overclocking demands out of the box, something gamers around the world eagerly anticipate

Fan Photos

Complete article at



Active-matrix OLED (Active-matrix organic light-emitting diode or AMOLED) is a display technology for use in mobile devices and televisions. OLED describes a specific type of thin film display technology in which organic compounds form the electroluminescent material, and active matrix refers to the technology behind the addressing of pixels.

An AMOLED display is a matrix of OLED pixels that emits light upon electrical activation that have been deposited or integrated onto a thin film transistor (TFT).

Typically, this continuous current flow is controlled by at least two TFTs at each pixel, one to start and stop the charging of a storage capacitor and the second to provide a voltage source at the level needed to create a constant current to the pixel and eliminating need for the very high currents required for passive matrix OLED operation.[6]

TFT backplane technology is crucial in the fabrication of AMOLED displays. Two primary TFT backplane technologies, namely polycrystalline silicon (poly-Si) and amorphous silicon (a-Si), are used today in AMOLEDs. These technologies offer the potential for fabricating the active matrix backplanes at low temperatures (below 150°C) directly onto flexible plastic substrates for producing flexible AMOLED displays.


The Super AMOLED offers much brighter, clearer, and less reflective AMOLED On-Cell (Samsung has placed a touch-sensor over the display and made it evaporate. The thickness of the touch sensor is just 0.001mm this allows the screen to provide better images and to have great visibility even in direct sunlight) display, featuring a high resolution WVGA (800×480 pixels) screen with mDNIe (mobile Digital Natural Image engine) technology. DNIe technology is proven display technology which incorporated to Samsung’s LCD TV and LED TV lineups. With a free viewing angle and super fast response, the Samsung Wave display provides superb image quality for viewing both videos and photos. Samsung suggested that this new Super OLED is five times more vivid than regular and performs 20 percent better when it is used outdoor.

A typical OLED Cell

AMOLED Under microscope



Accelerometers Unveiled!!

Aren’t you surprised seeing smartphone users spending more time on the applications these phones afford rather than talking on these devices. Reason being the Smartphones come with so many applications which extend their features and functionalities. With the advent of iPhone, Apple introduced a catchy feature known as Accelerometer.  Today you can find this feature in variety of Motorola, Samsung and LG phones. Naming a few Omnia, Wave, Galaxy S, Nexus, etc.

So What the heck is an accelerometer?

Today many smartphone users have become powerusers. Many smartphone companies give away free SDK’s. Technically speaking smartphones have become small PC for which you can develop your own application and even commercialize it  if you want to make money out of it.

Coming back to the topic: The accelerometer is a feature in smart phones which makes it possible to rotate the display (in a very vague term) of the phone when you rotate the phone from portrait to landscape and from landscape to portrait. This means if you hold your phone in a normal position just as you hold other phones, the display it takes is portrait. It adjusts to landscape when the phone is rotated. In iPhone iTouch accelerometer makes possible better display and control in playing games, better readability and viewing angle during reading,
listening to music, watching videos etc. These applications are developed in a way that they make use of the accelerometer for giving better experience to the users. The accelerometer is vastly leveraged by game applications. The wide screen not only gives a larger display for enhanced gaming experience but also afford more control touch buttons which intensifies a player’s involvement in the game.

Technical Aspects

An accelerometer is nothing but a Gyroscope:
“A device for measuring or maintaining orientation, based on the principles of conservation of angular momentum.” Wow!! that was some pure physics definition.

Anyways in layman term: “It is used for measuring or maintaining orientation, which is the exact reason an iPhone contains one of these gizmos.”

Since a mechanical gyroscope makes smartphones bulky, electronic gyroscopes are used. In particular the iPhone utilizes a microscopic, electronic version of a vibrational gyroscope, also called a MEMS gyroscope.
A basic MEMS device consists of an ASIC (application-specific integrated circuit) and a micro-machined silicon sensor. The type AGD1 2022 FP6AQ (Topmost picture) chip found in the iPhone 4 is a MEMS gyroscope designed by STMicroelectronics which is similar to their L3G4200D gyroscope.

Anatomy of GK10A MEMS Die

The GK10A is comprised of a plate, called the “proof mass,” that vibrates (oscillates) when a drive signal is applied to set of drive capacitor plates. When a user rotates the phone, the proof mass gets displaced in the X,  Y, and Z directions by Coriolis forces (the Coriolis effect is an apparent deflection of moving objects when they are viewed from a rotating reference frame).

The ASIC processor then senses the proof mass’ displacement through capacitor plates located underneath the proof mass, as well as finger capacitors at the edges of the package. The V654A type ASIC die converts the tiny capacitive signals from the GK10A MEMS die into a digital signal which is fed into the iPhone Hardware interface. This data is used accordingly for iPhone applications such as to turn the steering wheel of a car or to aim a gun in games.
In terms of mechanics, the sensitivity of MEMS gyroscopes is usually in mV/dps (or degrees per second), so the output of the oscillator (in mV) divided by the sensitivity (mV/dps) provides the angular rate applied to the package, in degrees per second.

Some pictures of MEMS Micro-Structures

Complete Article at iFixit

NVIDIA Tegra 2 for Smartphones

While the convergence of mobile phone and computing technology has been building for
years, we are now starting to experience exciting and disruptive new applications and usage
models as the next generation of mobile devices begin to deliver on the promise of a truly
mobile computing experience.

Consumer expectations for new mobile devices are very high. These new devices are more
immersive and interactive than ever before, which makes the user hyper-aware of device
performance. Consumers are demanding highly responsive user interfaces, uncompromised
web browsing performance, visually compelling online and offline gaming experiences, and
access to all of their content, while extending battery life beyond levels found in current mobile

The NVIDIA® Tegra™ 2 mobile processor is a multi-core system-on-a-chip (SoC) that is
specifically designed to deliver the performance required for current and future mobile use
cases. Implementing a powerful pipelined vertex and pixel processing architecture, the Tegra 2
ultra low power GeForce™ GPU core includes several features that reduce power
consumption and increase graphics quality.

Read whitepaper

AMD APU Carbon Footprint

The   AMD   Fusion  Family   of   Accelerated   Processing   Units   (APUs),  introduced   to   market   in  January  2011,  is   a  new   generation   of   processors   that
combines the computing processing unit (CPU) and graphics processing unit (GPU) capabilities in a single chip (die). APU-based platforms can deliver a
prodigious   amount   of   computational   horsepower,  and   can   present   enormous   opportunities   in   developing   an   application  ecosystem  beyond  today’s
mainstream computer systems.

While APUs seek to deliver a superior, immersive PC experience, they also can provide tangible environmental benefits. By eliminating a chip to chip
link and by introducing new holistic power management techniques, the APUs are designed to be more power efficient than current generation platforms
that have both computational and graphical capabilities.

This paper compares the environmental impact of one of AMD’s first APU products against an equivalent computer platform powered by the current
generation of AMD processors (CPUs and GPUs). By conducting a business to consumer (B2C) lifecycle assessment, this study compares the total
lifecycle greenhouse gas (GHG) emissions (also known as a “carbon footprint”) of an APU system (based on the 18W dual-core processor codenamed
“Zacate” and the M1 chipset codenamed “Hudson”) with the latest AMD system codenamed “Nile” (which is based on an AMD Athlon™ Neo II Dual Core
processor, SB820 Southbridge, RS880M Northbridge with an ATI  Mobility Radeon™ HD 5430 discrete graphics card). This study concludes that the
APU system offers significant GHG benefits (up to a 40% emissions reduction) when compared with the Nile platform.

See Whitepaper for details.