Crucial CT25664AC800 2 GB DDR2 800 MHz (PC2-6400) CL6 SODIMM 200-Pin Memory

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Variety of Capacities and Speeds: SODIMMs are available in a range of capacities and speeds, allowing users to choose the memory configuration that best meets their needs. https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/modules/parity_rdimm/htf36c256_512_1gx72pz.pdf?rev=e8e3928f09794d61809f92abf36bfb24 [ bare URL PDF]Memory chip type used on the module (SDRAM, DDR SDRAM, and so on)—Today, a particular memory module type uses only one type of memory. However, older memory module types such as early 168-pin DIMMs were available with different types of memory chips. You need to specify the right memory chip type in such cases to avoid conflicts with onboard memory and provide stable performance. Higher-speed DDR2 DIMMs can be mixed with lower-speed DDR2 DIMMs, although the memory controller will operate all DIMMs at same speed as the lowest-speed DIMM present. Smith, Ryan (2020-07-14). "DDR5 Memory Specification Released: Setting the Stage for DDR5-6400 And Beyond". AnandTech . Retrieved 2020-07-15. Like the DIMM form factor, no generation of SODIMM form factored RAM is compatible. This is because the form factor is essentially the only difference between DIMM and SODIMM. There aren’t any performance impacts beyond increased thermal constraints and physical capacity limits inherent to the smaller form factor.

Form factors [ edit ] A comparison between 200-pin DDR and DDR2 SDRAM SO-DIMMs, and a 204-pin DDR3 SO-DIMM module [13] Currently there are two standards for these various DIMM types: DDR (Double Data Rate) and DDR2 (Double Data Rate2). The DDR2 is essentially an upgraded version of the DDR standard that allows for memory modules with lower power consumption, greater heat dissipation, increased speed capabilities, larger memory capacities, and increased performance. In this article, we are going to talk about the different form factors of RAM modules and how they are distinct from one another. RAM Form Factors DIMM For critical applications, network servers have long used a special type of memory called error-correcting code (ECC). This memory enables the system to correct single-bit errors and notify you of larger errors. Almost all systems can be used with a variety of memory sizes. However, systems that are designed to access two or more identical modules as a single logical unit (multi-channel) provide faster performance than systems that access each module as a unit. Single-Channel

Ever-increasing amounts of RAM are needed as operating systems and applications get more powerful and add more features. Because RAM is one of the most popular upgrades to add to any laptop or desktop system during its lifespan, you need to understand how RAM works, which types of RAM exist, and how to add it to provide the biggest performance boost to the systems you maintain. DIMM stands for “ Dual Inline Memory Module.” Since the aforementioned form factors all have the word “DIMM” in them, these are all dual inline modules. DDR2 SDRAM SPECIFICATION" (PDF). JESD79-2E. JEDEC. April 2008: 78 . Retrieved 2009-03-14. {{ cite journal}}: Cite journal requires |journal= ( help) MicroDIMMs started out with 144 pins and now have 214 pins on the same form factor module. DIMM VS. SODIMM VS. MicroDIMM: A Comparison DIMM, SODIMM, MicroDIMM DDR2 Size Comparison

Computer memory module Two types of DIMMs: a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). The SDRAM module has two notches (rectangular cuts or incisions) on the bottom edge, while the DDR1 SDRAM module has one. Also, each module has eight RAM chips, but the lower one has an unoccupied space for the ninth chip; this space is occupied in ECC DIMMs. Three SDRAM DIMM slots on a ABIT BP6 computer motherboardUser Upgradeable: Many laptops and SFF machines have user-accessible memory slots, making it relatively straightforward to upgrade the memory by replacing or adding SODIMMs. DDR2 SDRAM was first produced by Samsung in 2001. In 2003, the JEDEC standards organization presented Samsung with its Technical Recognition Award for the company's efforts in developing and standardizing DDR2. [1] Capacity shouldn’t be an issue with modern hardware. It’s possible to get 32GB SODIMMs with DDR4 or DDR5 memory, which are not even costly. That allows for up to 64GB of RAM in a laptop with the standard two SODIMM slots, which should be more than enough for almost any task. Thermal Issues DDR2's bus frequency is boosted by electrical interface improvements, on-die termination, prefetch buffers and off-chip drivers. However, latency is greatly increased as a trade-off. The DDR2 prefetch buffer is fourbits deep, whereas it is twobits deep for DDR. While DDR SDRAM has typical read latencies of between two and three bus cycles, DDR2 may have read latencies between three and nine cycles, although the typical range is between four and six. Thus, DDR2 memory must be operated at twice the data rate to achieve the same latency.