Term
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Definition
| A refined version of EDO memory that significantly improved access time over EDO. Was not widely used because Intel chose not to support it. Stored on 168-pin DIMM modules. |
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Term
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Definition
| A method of measuring access timing to memory, which is the number of clock cycles required to write or read a column of data off a memory module. |
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Term
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Definition
| A placeholder RIMM module that provides continuity so that every RIMM slot is filled. |
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Term
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Definition
| A version of SDRAM that is faster than DDR and uses less power. |
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Term
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Definition
| A version of SDRAM that is faster than DDR2 memory and that can use triple channels. |
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Term
| Direct Rambus DRAM (Direct RDRAM) (Rambus) |
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Definition
| A memory technology by Rambus and Intel that uses a narrow network-type system bus. Memory is stored on a RIMM module. |
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Term
Double Data Rate SDRAM
(DDR SDRAM, SDRAM II, DDR) |
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Definition
| A type of memory technology used on DIMMs that runs at twice the speed of the system clock. |
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Term
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Definition
| A DIMM feature whereby memory chips are installed on both sides of a DIMM. |
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Term
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Definition
| A motherboard feature that improves memory performance by providing two 64-bit channels between memory and the chipset. Can be used by DDR, DDR2, and DDR3 DIMMs |
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Term
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Definition
| Double-sided DIMMs that provide two 64-bit banks. The memory controller accesses first one bank and then the other. |
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Term
| ECC (error-correcting code) |
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Definition
| A chipset feature on a motherboard that checks the integrity of data stored on DIMMs or RIMMs and can correct single-bit errors in a byte. |
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Term
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Definition
| A type of outdated RAM that was faster than conventional RAM because it eliminated the delay before it issued the next memory address. |
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Term
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Definition
| An outdated memory mode used before the introduction of EDO memory. (Improved on earlier memory types by sending the row address just once for many accesses to memory near that row.) |
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Term
| General Protection Fault (GPF) |
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Definition
| A Windows error that occurs when a program attempts to access a memory address that is not available or is no longer assigned to it. |
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Term
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Definition
| The memory a processor addresses at one time. |
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Term
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Definition
| An error-checking scheme in which a ninth bit is added. The value of the bit is set to either 0 or 1 to provide an even number of ones for even ______ and an odd number of ones for odd ______. |
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Term
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Definition
| An error that occurs when the number of 1s in the byte is not in agreement with the expected number. |
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Term
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Definition
| A method of measuring access timing to memory, which is the number of clock cycles required to write or read a row of data off a memory module. |
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Term
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Definition
| Chips that have been used and returned to the factory, marked again, and resold. The surface of the chips may be dull or scratched. |
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Term
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Definition
| A type of memory module developed by Rambus, Inc. |
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Term
| SIMM (single inline memory module) |
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Definition
| A miniature circuit board used in older computers to hold RAM. They hold 8, 16, 32, or 64 MB on a single module. |
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Term
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Definition
| The memory controller on a motherboard that can access only one DIMM at a time. |
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Term
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Definition
| DIMMs that provide only one 64-bit bank. All memory chips on the DIMM are accessed at the same time. |
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Term
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Definition
| Memory chips embedded on only a single side of a DIMM. |
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Term
| SO-DIMM (small outline DIMM) |
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Definition
| A type of memory module used in notebook computers that uses DIMM technology. |
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Term
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Definition
| A type of memory stored on DIMMs that runs in sync with the system clock, running at the same speed as the motherboard. |
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Term
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Definition
| When the memory controller accesses three DIMMs at the same time. |
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