Tech Glossary D

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Tech Glossary – D

DDR (Double Data Rate)

Stands for “Double Data Rate.” It is an advanced version of SDRAM, a type of computer memory. DDR-SDRAM, sometimes called “SDRAM II,” can transfer data twice as fast as regular SDRAM chips. This is because DDR memory can send and receive signals twice per clock cycle. The efficient operation of DDR-SDRAM makes the memory great for notebook computers since it uses up less power.

DDR2 (Double Data Rate 2)

DDR2 RAM uses a different design than DDR memory. The improved design allows DDR2 RAM to run faster than standard DDR memory. The modified design also gives the RAM more bandwidth, which means more data can be passed through the RAM chip at one time. This increases the efficiency of the memory.

Defragment

Adding and deleting files from your hard disk is a common task. Unfortunately, this process is not always done very efficiently. If you have a ton of “fragmented” files on your hard disk, you might hear extra grinding, sputtering, and other weird noises coming from your computer. Defragmenting your hard disk is a great way to boost the performance of your computer.

Driver

A driver is a small file that helps the computer communicates with a certain hardware device. It contains information the computer needs to recognize and control the device. In Windows-based PCs, a driver is often packaged as a dynamic link library, or .DLL file. In Macs, most hardware devices don’t need drivers, but the ones that do usually come with a software driver in the form of a system extension, or .KEXT file.

Dual core

A dual-core processor is a CPU with two processors or “execution cores” in the same integrated circuit. Each processor has its own cache and controller, which enables it to function as efficiently as a single processor. However, because the two processors are linked together, they can perform operations up to twice as fast as a single processor can.