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

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Form factors [ edit ] A comparison between 200-pin DDR and DDR2 SDRAM SO-DIMMs, and a 204-pin DDR3 SO-DIMM module [13] a b c d e f g https://www.google.com/books/edition/Upgrading_and_Repairing_Laptops/xCXVGneKwScC?hl=en&gbpv=0

If you like tech, there’s a decent chance that you’ve seen inside a computer at some point. You may identify some or all of the parts by sight. The inside of a laptop may well be another thing entirely. Unlike desktop computers, you don’t really get laptops with sizeable tempered glass or polycarbonate panels to let you see inside. The table below summarises the three common form factors of memory modules used in tech gadgets today: User Upgradeable: Many laptops and SFF machines have user-accessible memory slots, making it relatively straightforward to upgrade the memory by replacing or adding SODIMMs.Look for the “Form Factor” to know your module’s size. View the memory module’s form factor in Task Manager Mueller, Scott (March 7, 2013). "Upgrading and Repairing PCs: Upgrading and Repairing_c21". Que Publishing – via Google Books. RAM Compatibility—Learn how to make sure additional memory works with existing memory in this section. Designed for use with Intel Skylake (6th generation Core i-series CPU); memory controller on motherboard/ processor must support both DDR3 and DDR4 memory Some small form factor motherboards may use SODIMM slots rather than full DIMMs. The Nano-ITX motherboard standard also includes a SODIMM slot rather than a full-sized DIMM slot. Some upgradeable office printers, routers, and NASs may also use SODIMM slots. However, this would be compared to soldering the memory chips to the motherboard rather than using full-sized DIMMs. Capacity Issues

The small volume of the SODIMM form factor makes them ideal for use in computers with unusually constrained space. As you might have gathered from the intro, SODIMMs are primarily used in laptops. Not all laptops use SODIMM memory, though. As much as it is convenient for users that want the option to upgrade RAM in the future. It’s slightly more complex and expensive to implement than simply soldering the RAM chips directly onto the motherboard. Similar to what you would see on a mobile phone. JEDEC decided that the terms "dual-sided", "double-sided", or "dual-banked" were not correct when applied to registered DIMMs (RDIMMs). Most DIMMs are built using "×4" ("by four") or "×8" ("by eight") memory chips with up to nine chips per side; "×4" and "×8" refer to the data width of the DRAM chips in bits. High capacity DIMMs such as 256GB DIMMs can have up to 19 chips per side.The above example applies to ECC memory that stores 72 bits instead of the more common 64. There would also be one extra chip per group of eight, which is not counted. DIMMs are the memory modules you see inside desktop computers. They are relatively larger in size than the SODIMM and MicroDIMM modules. These are 133.35 mm (5.25 inches) in length.

JEDEC standard: DDR2 SDRAM Specification: JESD79-2F, November 2009 ** http://www.jedec.org/standards-documents/docs/jesd-79-2e Samsung Electronics Announces JEDEC-Compliant 256Mb GDDR2 for 3D Graphics". Samsung Electronics. Samsung. 23 August 2003 . Retrieved 26 June 2019. https://www.google.com/books/edition/The_X86_Microprocessors_Architecture_And/zWrZY1OgTPsC?hl=en&gbpv=1&dq=dimm+simm+ram&pg=PA576&printsec=frontcover Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.Another distinction that defines the type of memory module is its size, also referred to as its “form factor.” The most common form factors are DIMM, SODIMM, and MicroDIMM. 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. If you have been in the tech industry for a while, you will know that there are different types and sizes of RAM/memory modules available. When referring to RAM sizes, we mean its physical size, and not its capacity (4 GB, 16 GB, etc.).

Use a digital camera or smartphone set for close-up focusing so you can document the system’s interior before you start the upgrade process. 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.DIMMs are often referred to as "single-sided" or " double-sided" to describe whether the DRAM chips are located on one or both sides of the module's printed circuit board (PCB). However, these terms may cause confusion, as the physical layout of the chips does not necessarily relate to how they are logically organized or accessed. DDR2 SDRAM SPECIFICATION" (PDF). JESD79-2E. JEDEC. April 2008: 78 . Retrieved 2009-03-14. {{ cite journal}}: Cite journal requires |journal= ( help) 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.