Form factor (computer technology)
In computer technology , the form factor is an indication of the size and mounting options of a component that is used in a computer . Thanks to this standardization, various components can be easily combined and exchanged. The term form factor often means nothing else than the term format, sometimes as much as standard or specification . Although the word component factor is somewhat misleading, the term is very often used as a literal translation from English ( form factor ).
For example , form factors describe circuit boards , drives, and power supplies . For PC motherboards ( main boards ), for example, dimensions, mounting heights of the electronic components and the number, location and size of the mounting holes are specified.
Motherboards
Mainboards that have smaller dimensions than ATX are often grouped under the collective term Small Form Factor .
| Form factor | Size in mm | Size in inches | Remarks |
|---|---|---|---|
| 3.5 ″ | 146 × 102 | 5.75 × 4 | based on the corresponding hard drive format |
| 5.25 ″ | 203 × 146 | 8 x 5.75 | based on the corresponding hard drive format |
| AT | 305 x 279-330 | 12 x 11-13 | |
| ATX | 305 × 244 | 12 x 9.6 | 1996 |
| Baby AT | 216 x 204-330 | 8.5 x 8-13 | |
| BTX | 325 × 267 | 12.8 x 10.5 | Intel 2004 |
| COM Express Extended | 110 × 115 | 4.3 x 4.5 | PICMG |
| COM Express Basic | 125 × 95 | 5 x 3.7 | PICMG |
| COM Express Compact | 95 × 95 | 3.7 x 3.7 | PICMG |
| COM Express Mini | 84 × 55 | 3.3 x 2.17 | PICMG |
| CoreExpress | 65 × 58 | 2.28 x 2.56 | SFF-SIG |
| DTX | 244 × 203 | 9.6 × 8 | AMD 2007 |
| EBX | 146 × 203 | 5.75 x 8.0 | |
| EPIC | 115 × 165 | 4.5 x 6.5 | 2004 |
| ETX | 114 × 95 | 4.5 x 3.7 | Kontron |
| E-ATX | 305 × 330 | 12 × 13 | 2000 |
| Enhanced E-ATX (EE-ATX) | 347.47 x 330.20 | 13.68 x 13.00 | Supermicro server boards |
| Flex-ATX | 229 × 191 | 9.0 x 7.5 | Intel 1999 |
| HPTX | 345 × 381 | 13.6 x 15.0 | EVGA coined the HPTX form factor in 2010 with the Super Record 2 (SR-2), which is designed for 2 dual QPI - LGA1366 socket CPUs ( Intel Core i7 , Intel Xeon (Nehalem) ), 7 × PCI-E and 12 × DDR3 slots |
| ITX | 215 × 191 | 8.46 x 7.52 | VIA 2001 |
| LPX | 229 × 279… 330 | 9 × 11… 13 | semi-proprietary 1996 |
| Micro-ATX (µATX) | 244 × 244 | 9.6 x 9.6 | 1996; Boards with only 2 RAM slots are now often much narrower than the standard. |
| Micro-BTX (µBTX) | 264 × 267 | 10.4 x 10.5 | Intel 2004 |
| Mini ATX | 284 × 208 | 11.2 x 8.2 | obsolete standard, included up to ATX version 2.03, removed in ATX version 2.1 |
| Mini ATX | 150 × 150 | 5.9 x 5.9 | Format designation for a series from AOpen |
| Mini DTX | 170 × 203 | 6.7 × 8 | AMD 2007 |
| Mini-ITX | 170 × 170 | 6.7 x 6.7 | Shuttle 2003, then VIA |
| Mini LPX | 203-229 x 254-279 | 8-9 x 10-11 | see LPX |
| Mini-STX | 147 × 140 | 5.8 x 5.4 | Intel 2015 |
| Nano ITX | 120 × 120 | 4.7 x 4.7 | VIA 2004 |
| NLX | 203-229 x 254-345 | 8-9 x 10-13.6 | Intel 1999 |
| Next Unit of Computing (NUC) | 101.6 x 101.6 | 4 × 4 | Intel 2014 |
| PC / 104 | 90 × 96 | 3.550 x 3.775 | |
| Pico BTX | 203 × 267 | 8 x 10.5 | Intel 2004 |
| Pico-ITX | 100 × 72 | 4 x 2.8 | VIA 2007 |
| SSI CEB | 305 × 267 | 12 x 10.5 | |
| SSI EEB | 305 × 330 | 12 × 13 | |
| SSI MEB | 330 × 406 | 13 × 16 | |
| STX | 96 × 90 | 3.7 x 3.5 | Axiomtek |
| UTX | 108 × 88 | 4.25 x 3.46 | TQ Components |
| WTX | 356 × 425 | 14 x 16.7 | Intel 1998 |
| XL-ATX | 345.4 x 263.0 | 13.5 x 10.3 | EVGA, Gigabyte, MSI (not an official standard) |
| XT | 216 × 279 | 8.5 × 11 | |
| Qseven | 70 × 70 | 2.75 x 2.75 | SGeT |
| µQseven | 40 × 70 | 1.57 x 2.75 | SGeT |
| EmbeddedNUC | 102 × 102 | 4 × 4 | SGeT |
In bold : specified dimensions (not rounded)
Hard drives
| Form factor | Size in mm | Size in inches | Remarks |
|---|---|---|---|
| 5.25 ″ - full height | 146 × 203 × 82.6 | 5.75 x 8.00 x 3.25 | early 1980s to mid 1990s |
| 5.25 ″ - half height | 146 x 203 x 41.4 | 5.75 x 8.00 x 1.63 | early 1980s to mid 1980s |
| 5.25 ″ - Low Profile | 146 x 203 x 25.4 | 5.75 x 8.00 x 1.00 | early to late 1990s |
| 5.25 ″ - Ultra Low Profile | 146 × 203 × 19 (20.3) | 5.75 × 8.00 × 0.75 (0.8) | early to late 1990s |
| 3.5 ″ - half height | 101.6 x 146 x 41.4 | 4.00 x 5.75 x 1.63 | |
| 3.5 ″ - low profile | 101.5 x 146 x 26.1 | 4.00 x 5.75 x 1.028 | Desktops, most common design in 2005 |
| 2.5 ″ - 19 mm high | 70 × 100 × 19 | 2.75 x 3.94 x 0.75 | Laptops |
| 2.5 ″ - 17 mm high | 70 × 100 × 17 | 2.75 x 3.94 x 0.67 | Laptops |
| 2.5 ″ - 12.5 mm high | 70 x 100 x 12.4 | 2.75 x 3.94 x 0.49 | Laptops, subnotebooks |
| 2.5 ″ - 9.5 mm height | 70 x 100 x 9.4 | 2.75 x 3.94 x 0.37 | Laptops, subnotebooks |
| 2.5 ″ - 7 mm high | 70 × 100 × 7 | 2.75 x 3.94 x 0.27 | Laptops, subnotebooks |
| 1.8 ″ | 54 × 70 × (5/7/8 / 9.5) | 2.13 × 2.75 × (0.2 / 0.28 / 0.31 / 0.37) | Subnotebooks , MP3 players |
| 1 ″ microdrive | 30 × 40 × 5 | 1.2 x 1.6 x 0.2 | MP3 players, digital cameras |
Optical drives
The dimensions of optical drives are usually:
| Form factor | Dimensions in mm | ||
|---|---|---|---|
| width | height | depth | |
| PC drive 5.25 ″ | 146 | 41 | 165-200 |
| SlimLine drive 5.25 ″ | 128 | 12.7 | 124-130 |
| UltraSlim drive 5.25 ″ | 128 | 9.5 | 124-130 |
Individual evidence
- ↑ embedded NUC ™ Hardware Specification V1.0 ( Memento of the original from June 2, 2016 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. , from November 14, 2014
- ↑ a b Barracuda® 3.5-inch SATA 500-GB hard drive
- ↑ a b Deskstar 7K2000 2TB 3.5-INCH HARD DISK DRIVE ( Memento from February 15, 2011 in the Internet Archive )
- ↑ Vertex 3 Low Profile Solid State Drive ( Memento from April 20, 2013 in the Internet Archive )
- ↑ http://www.computer-masters.de/laufwerksgroessen.php
Web links
- Information page form factors (English)
- Information page server (SSI) form factors (English)