| Revision as of 03:46, 26 June 2015 editDsimic (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers39,664 edits →Variants of 200-pin SO-DIMMs: Cleaned up a bit and... added another reference :)← Previous edit |
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#REDIRECT ] |
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{{More references|date=August 2014}} |
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{{Redirect category shell|1= |
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] DDR2 SO-DIMM]] |
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{{R printworthy}} |
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An '''SO-DIMM''', '''SODIMM''', or '''small outline dual in-line memory module''', is a type of ] built using ]. |
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SO-DIMMs are a smaller alternative to a ], being roughly half the size of regular DIMMs. SO-DIMMs are often used in systems that have limited space, such as ]s, small-footprint ]s (such as those with a ] ]), high-end upgradable office ], and ] like ]s and ] devices.<ref>{{cite web|url=https://www.synology.com/en-global/products/Synology_RAM_Module|title=Synology RAM Module|author=Synology Inc.|work=synology.com}}</ref> |
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== Visual identification == |
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Most types of SO-DIMMs can be recognized at a glance by the distinctive notches that “key” them for different applications:<ref name="custhelp">{{cite web |
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| url = http://acer.custhelp.com/app/answers/detail/a_id/2178/~/are-ddr,-ddr2-and-ddr3-so-dimm-memory-modules-interchangeable%3F |
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| title = Are DDR, DDR2 and DDR3 SO-DIMM memory modules interchangeable? |
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| accessdate = 2015-06-26 |
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| website = acer.custhelp.com |
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}}</ref> |
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* 100-pin SO-DIMMs have two notches.<ref>{{cite web |
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| url = http://www.memorytesters.com/ramcheck/ddr_100pin_adap.htm |
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| title = RAMCHECK 100-Pin DDR Adapter, a tool for testing and identifying JEDEC-compliant 100-pin DDR SO-DIMM modules |
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| year = 2013 | accessdate = 2015-06-26 |
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| website = memorytesters.com |
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}}</ref> |
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* 144-pin SO-DIMMs have a single notch near the center.<ref>{{cite web |
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| url = http://www.micron.com/~/media/documents/products/data-sheet/modules/sodimm/sdf16c32_64x64hg.pdf |
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| title = Small-outline SDRAM module (MT16LSDF3264(L)H 256 MB and MT16LSDF6464(L)H 512 MB) Datasheet |
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| date = 2006-05-03 | accessdate = 2015-06-26 |
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| publisher = ] | format = PDF |
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| page = 22 |
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}}</ref> |
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* 200-pin SO-DIMMs have a single notch nearer to one side.<ref>{{cite web |
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| url = http://www.smartm.com/files/salesLiterature/dram/ddr.pdf#page=4 |
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| title = DDR DIMM & SO-DIMM Modules (184-pin DDR DIMM, 100-pin DDR DIMM, and 200-pin DDR SO-DIMM modules) |
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| year = 2011 | accessdate = 2015-06-26 |
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| website = smartm.com | format = PDF |
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| page = 4 |
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}}</ref> The exact location of this notch varies (read below). |
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* 204-pin SO-DIMMs (]) have a single notch closer to the center than on 200-pin SO-DIMMs.<ref>{{cite web |
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| url = http://www.nanya.com/NanyaAdmin/GetFiles.ashx?ID=1118 |
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| title = NT2GC64B(C)H4B0PS / NT4GC64B(C)88B0(1)NS / NT8GC64B(C)8HB0NS PC3(L)-10600 / PC3(L)-12800 Unbuffered DDR3 SO-DIMM |
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| date = December 2012 | accessdate = 2015-06-26 |
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| website = nanya.com | format = PDF |
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| page = 23 |
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}}</ref> |
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* 260-pin SO-DIMMs (]), {{convert|69.6|mm|in|abbr=in}} wide and {{convert|30|mm|in|abbr=in}} high, making them {{convert|2|mm|in|abbr=in}} wider than DDR3 SO-DIMMs, with a single notch after pin 144.<ref>{{cite web |
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| url = http://www.micron.com/-/media/documents/products/data%20sheet/modules/sodimm/ddr4/asf18c1gx72hz.pdf |
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| archiveurl = http://web.archive.org/web/20141129035318/http://www.micron.com/-/media/documents/products/data%20sheet/modules/sodimm/ddr4/asf18c1gx72hz.pdf |
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| title = DDR4 SDRAM SO-DIMM (MTA18ASF1G72HZ, 8 GB) Datasheet |
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| date = 2014-09-10 | accessdate = 2015-06-26 | archivedate = 2014-11-29 |
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| publisher = ] | format = PDF |
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| page = 18 |
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}}</ref> |
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* 260-pin SO-DIMMs (]), {{convert|69.6|mm|in|abbr=in}} wide and {{convert|30|mm|in|abbr=in}} or {{convert|20|mm|in|abbr=in}} high, with a single notch placed differently than on DDR3 SO-DIMMs.<ref>{{cite web |
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| url = https://intel.activeevents.com/sf14/connect/fileDownload/session/088B5032E176191914DF467EAE7171BB/SF14_SPCS009_102f.pdf |
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| title = DDR4: The Right Memory for Your Next Server and High-End Desktop System |
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| date = 2014-09-16 | accessdate = 2015-06-26 |
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| author1 = Geof Findley | author2 = Becky Loop |
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| publisher = ] | website = intel.activeevents.com |
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| format = PDF | page = 28 |
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}}</ref><ref>{{cite web |
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| url = http://www.techpowerup.com/205231/how-intel-plans-to-transition-between-ddr3-and-ddr4-for-the-mainstream.html |
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| title = How Intel Plans to Transition Between DDR3 and DDR4 for the Mainstream |
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| date = 2014-09-14 | accessdate = 2015-06-26 |
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| website = techpowerup.com |
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}}</ref> |
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=== Variants of 200-pin SO-DIMMs === |
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The 200-pin SO-DIMM can be of the types DDR and DDR2. In both cases the notch is located at one fifth of the board length (20 pins + notch + 80 pins), but in DDR2 the notch is located slightly closer to the center of the board. These two types of memory are not interchangeable. The different notch locations are designed to prevent cross-installation, aiding at the same time in visually identifying 200-pin SO-DIMM modules.<ref name="custhelp" /> |
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This variance is designed to prevent coupling of memory and controllers of different DDR generations due to electrical incompatibility. DDR SO-DIMMs operate at 2.5 V while DDR2 SO-DIMMs operate at 1.8 V.<ref>{{cite web |
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| url = http://www.integralmemory.com/faq/can-i-mix-ddr-ddr2-and-ddr3-modules-my-pc |
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| title = DRAM{{snd}} Can I mix DDR, DDR2 and DDR3 modules-my PC? |
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| accessdate = 2015-06-26 |
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| website = integralmemory.com |
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}}</ref> |
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== {{Anchor|SO-CDIMM}}General characteristics == |
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200- and 204-pin SO-DIMMs are {{Convert|67.6|mm|in|abbr=in}} long and {{Convert|31.75|mm|in|abbr=in}} wide, with a maximum total depth of {{Convert|3.8|mm|in|abbr=in}}.<ref> page 26</ref> |
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SO-DIMMs are more or less equal in power and voltage rating to DIMMs, and despite the smaller size of memory modules, SO-DIMM technology does not mandate lower performance compared to larger DIMMs. For example, SO-DIMMs provide clock speeds such as 400 MHz (]), ] such as 2, 2.5 and 3, and higher capacities such as 512 MB or 1 GB. |
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DDR2 SO-DIMM memory modules commonly have clock speeds from 200 MHz up to 400 MHz (]).{{Citation needed|date=December 2010}} 204-pin SO-DIMMs can also contain DDR3 SDRAM, with specifications such as PC3-6400, PC3-8500, PC3-10600, and PC3-12800.<ref></ref><!-- should be replaced, empty! --> 260-pin ]s may contain either DDR3 or DDR4 SDRAM, depending on their configuration. Some SO-DIMMs also provide ] functionality; ] ECC SO-DIMMs are called ''SO-CDIMMs''.<ref>{{cite web|url=http://www.rampedia.com/index.php/define-so-cdimm |title=Define-SO-CDIMM |publisher=RAMpedia |date= |accessdate=2014-08-24}}</ref> |
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LowHal SODIMMs are made using a low-halogen, environmentally-friendly process,<ref>{{cite web|url=http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/Low-Halogen-RAM/td-p/166685 |title=Low-Halogen RAM? - Lenovo Community |publisher=Forums.lenovo.com |date=2009-10-17 |accessdate=2014-08-24}}</ref> which does not affect chip performance. |
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== See also == |
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{{Portal|Electronics}} |
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{{Div col||25em}} |
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* ] (DIP) |
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* ] |
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* ]{{snd}} logical configuration of RAM modules (channels, ranks, banks, etc.) |
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* ] (RIMM) |
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* ] (SIMM) |
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* ] (SIP) |
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* ] (ZIP) |
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{{Div col end}} |
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== References == |
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{{Reflist|30em}} |
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== External links == |
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{{Commons category|SO-DIMM}} |
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* |
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* (XR-DIMM form factor) |
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{{DRAM}} |
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{{DEFAULTSORT:So-Dimm}} |
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] |
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