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Compression Attached Memory Module, thinner than SO-DIMM; The large memories found in personal computers, workstations, and non-handheld game-consoles normally consist of dynamic RAM (DRAM). Other parts of the computer, such as cache memories normally use static RAM. Small amounts of SRAM are sometimes used in the same package as DRAM. [2]
Historical lowest retail price of computer memory and storage Electromechanical memory used in the IBM 602, an early punch multiplying calculator Detail of the back of a section of ENIAC, showing vacuum tubes Williams tube used as memory in the IAS computer c. 1951 8 GB microSDHC card on top of 8 bytes of magnetic-core memory (1 core is 1 bit.)
In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module.Earlier 72-pin SIMMs included five pins that provided five bits of parallel presence detect (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode more information.
In part, this is because changes required to other components would affect all other parts of computer systems, which would need to be updated to work with DDR4. [37] 2014: In April, Hynix announced that it had developed the world's first highest-density 128 GB module based on 8 Gbit DDR4 using 20 nm technology. The module works at 2133 MHz ...
One should definitely be careful buying 1 GB memory modules, because all these variations can be sold under one price position without stating whether they are ×4 or ×8, single- or dual-ranked. There is a common belief that number of module ranks equals number of sides. As above data shows, this is not true. One can also find 2-side/1-rank ...
There are a number of other companies (AMD, Microchip, Altera, etc.) making specialized chipsets as part of other ICs, and they are not often found in PC hardware (laptop, desktop or server). There are also a number of now defunct companies (like 3com, DEC, SGI) that produced network related chipsets for us in general computers.
In other words, all control, address and data transfers to FB-DIMMs are performed in a serial fashion, while the additional logic present on each FB-DIMM transforms serial inputs into parallel signals required to drive memory chips. [9] By reducing the number of pins required per memory bus, CPUs could support more memory buses, allowing higher ...
the RAM in microcontrollers (usually from around 32 bytes to a megabyte), the on-chip caches in more powerful CPUs, such as the x86 family, and many others (from 8 KB, up to many megabytes), the registers and parts of the state-machines used in some microprocessors (see register file), scratchpad memory,