ECC stands for "Error Correction Codes" and is a method used to detect and correct errors introduced during storage or transmission of data. Certain kinds of RAM chips inside a computer implement this technique to correct data errors and are known as ECC Memory.
ECC Memory chips are predominantly used in servers rather than in client computers. Memory errors are proportional to the amount of RAM in a computer as well as the duration of operation. Since servers typically contain...
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Dual Inline Memory Module or DIMM is a series of Random Access Memory (RAM) chips mounted on a small printed circuit board. The entire circuit collectively forms a memory module. DIMMs are commonly used in personal computers, servers and high-end workstations. The DIMM makes physical contact with the data bus of the computer through teeth like connectors that fit into a socket on the mother board.
The earlier memory modules were known as SIMMs or Single Inline Memory Modules and had a...
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Read-Only Memory or ROM is an integrated-circuit memory chip that contains configuration data. ROM is commonly called firmware because its programming is fully embedded into the ROM chip. As such, ROM is a hardware and software in one.
Because data is fully incorporated at the ROM chip's manufacture, data stored can neither be erased nor replaced. This means permanent and secure data storage. However, if a mistake is made in manufacture, a ROM chip becomes unusable. The most expensive...
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NVRAM is an acronym for Non-Volatile Random Access Memory. NVRAM is a type of Random Access Memory (RAM) that retains its information when power is turned off. The NVRAM is a small 24 pin DIP (Dual Inline Package) integrated circuit chip and is thus able to obtain the power needed to keep it running from the CMOS battery installed in your motherboard. It keeps track of various system parameters such as serial number, Ethernet MAC (Media Access Control) address, HOSTID, date of manufacture...
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Unbuffered memory is memory where the memory controller module drives the memory directly, instead of using a store-and-forward system like registered memory.
Some systems do not support unbuffered memory, others require unbuffered memory, and many more give you the option to use unbuffered or registered memory.
The use of unbuffered memory is reasonable for gaming systems. It is not recommended for server-class systems.
Unbuffered memory is also known as unregistered memory. Buffered...
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DDR2 SDRAM, an abbreviation for double data rate two synchronous dynamic random access memory, is a type of a random access memory (RAM) commonly used in personal computers and various digital electronics today. This offspring from the SDRAM (synchronous dynamic random access memory), a part of DRAM (dynamic random access memory), is like an evolution from the DDR SDRAM; it can operate the external data bus twice as fast as its predecessor. This was possible by abandoning the original clock...
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EEPROM stands for Electrically Erasable Programmable Read-Only Memory. An EEPROM is like an EPROM chip since it can be written in or programmed more than once. Unlike the EPROM chip, however, an EEPROM chip need not be taken out of the computer or electronic device of which it is part when a new program or data needs to be written on it.
Selective programming can be done to an EEPROM chip. The user can alter the value of certain cells without needing to erase the programming on other...
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Registered memory modules have built-in registers on their address and control lines.
A register is a very small temporary holding area (usually 64 bits) for data.
These registers act as buffers between the CPU and the memory.
The use of registered memory increases system reliability, but also slows the system down a very slight bit as data must be moved through the registers.
Some systems do not support registered memory, others require registered memory, and many more give you the...
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When something begins to go wrong with a computer and things start acting differently than they should, the first thing to test should be the computer's memory. Problems, even small ones, in the computer's memory can lead to very erratic behavior from the computer, even causing it to crash. Memory Testing Software
Memtest86 is our recommended memory testing utility.
Memtest86 is a reliable program that can be a great help to you if you think your memory may be causing problems in...
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MRAM (Magnetoresistive Random Access Memory) is being considered as a viable replacement for current DRAM technology. Its key difference to the latter is its use of magnetic fields to save memory bits which makes the memory "permanent." As such, MRAM technology allows for faster access and data security.Current RAM Technology
Current RAM technology uses an electrical charge to store memory bits. Microminiaturized capacitors and transistors in an integrated circuit are 'stacked...
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