The ddr2 is the latest version of ddr . The fullform of ddr2 is double data rate interface. So both ddr andddr2 are not copatible in their own way. With respect of double pumping the data bus in ddr and ddr2 uses I/O buffer between memory and data bus . As a result the data bus plays with doube speed than the memory clock. So the combination of ddr and ddr2 collects four data transfers for each memory clock cycle.

so ddr2 reflects 3200MB/s which is the highest transfer rate at present. On the same external data bus clock rate on which ddr 2 is working gives the same bandwidth but iwth greater latency, giving inferior performance output. Now the good-rated ddr2 memory module are double fast in comparison to ddr memory modules. Actually ddr2 keeps its memory in memory cells which got acitve by the usages of clock signals which helps in synchronizing their work with the aid of external data bus. So ddr2 cells move the data on both rising and falling edges of the clock.

In this way ddr2 works very efficiently in comparison to data rate of ddr. The frequency of ddr2 bus is boosted by the usage of electrical interface improvements, prefetch buffers, on-die termination and also off-chip drivers. The latencyis marketed quite high. Now the 4 bits deep is considered for ddr2 prefetch buffer , for ddr 2 bits deep and for ddr3 8 bit deep is considered. At present ddr2 is carrying 4 to 6 cycles latencies. So in this way the ddr2 memory should work on double data rate to get the same latency.

Gadgets

A gadget is a small technological object (such as a device or an appliance) that has a particular function, but is often thought of as a novelty. Gadgets are constantly considered to be more uneven or cleverly designed than normal technological objects at the time of their invention. Gadgets are also called to as gizmos.

Gadgets appear to be the technical buzzword of the day. It all started with PDC and the announcement that the sidebar had made a return. Taking a page out of the Konfabulator book, Microsoft designed the sidebar to support gadgets, or mini applications. This was nothing new as it had been speculated that the sidebar would be making a return for several weeks now.

A gadget is a device that has a function which is made for a particular purpose. Gadgets are cleverly made and are more technologically advanced. This desktop gadgets are designed in such a way that it makes your work on the computer easier. Many desktop gadgets are made just for mere fun.

Let’s have a look at the most wanted gadgets in terms of popularity.

Google Weather. This gadget predicts weather for specified destinations. AnswerBall. You can ask a question to AnswerBall and it will give you the response in no time.If you have got a question then hold the mouse button down to shake AnswerBall and release it to get the answer. World clock. It is a stylish and elegant analogue clock. You can use it to watch satellite view, of any location as the day and night change.

DigiWatch. It is a desktop clock and a very handy one which can be easily set between AM/PM mode or 24 hour mode. You can also set alarms and see how much time is left until the alarm goes off with a live progress bar. You can even customize the alarm tones .For people who loves to keep DigiWatch always-on-top Transparent-mode is available for them. OMNI analogue. This is an analogue clock but with a digital readout.

Just click at the clock to switch between the various digital display modes - clock, alarm, stopwatch and countdown timer. The countdown gives an alert when it reaches to zero. Google calendar. You will receive a small copy of your Google Calendar to be at your side at all times. It has got features like add, view and share events without leaving the comfort of your own gadget. Gmail notifier. It is areal utility because it notifies you for the incoming emails.

DDR2