Before friend start

Objectives: learn around the common types of computer cases, names and sizes of usual motherboard form factors and also which motherboard fits which computer case.

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Prerequisites: no prerequisites.

Key terms: types of computer system cases, case size, full tower, mid tower, mini tower, slim line, small form factor, motherboard kind factors, atx, micro atx, mini atx, mini itx, btx, nlx, riser card

Computer Cases

The most common system case kind is the tower. Relying on the specific number of internal drive bays and the elevation of the tower, these situations can be further classified into mini-size, mid-size and full-size tower cases. Among the greatest considerations when choosing between case sizes is the variety of slots and also the variety of devices we would favor to include to those cases.

Full Tower

Full-tower instances are generally big with a elevation that is about or much more than 30 customs (more 보다 76 cm). The number of internal journey bays within these situations can be between 6 and 10.


Image 113.1 – Tower computer system Case

Mid Tower

Another situation that might be a step down, would be classified together a mid tower case. Mid-tower instances are the many widely used computer system cases. Mid Tower cases are about 18 come 24 (45 to 60 cm) inches high and they usually contain 2 to 4 internal drive bays and a similar number of external bays (for CD/DVD readers and also similar).


Image 113.2 – Mid Tower computer Case

Mini Tower

Mini-tower usually have actually up to 2 or sometimes 3 internal drive bays. Mini-cases generally stand at a height of 12 to 18 inch (30 to 45 cm). Expandability is a trouble with these cases.


Image 113.3 – Mini Tower computer system Case

Slim heat Case


Image 113.4 – Slim Line computer Case

Slim line instances are just tower cases turned on your sideways. They deserve to hold a screen on top of the case.

Small type Factor (SFF) Case

Small kind factor or SFF situations are custom instances that are designed to minimize the spatial volume of a desktop computer computer. SFFs are obtainable in a selection of sizes and also shapes, consisting of shoe boxes, cubes, and also book-sized PCs.


Image 113.5 – Small kind Factor computer system Case

Motherboard form Factor

There’s one important factor to consider we must be conscious of when picking the case size and that is the dimension of the motherboard. They have to match. The dimension of the motherboard is often referred to as the kind Factor and also there are numerous standards. The kind factor identify the dimension of the circuit board, the ar of the slots and also the place of the faceplate that comes the end the earlier of the computer. The kind factor likewise identifies the place of the holes the are provided to mount the motherboard right into the device case. For example, the full tower has more than sufficient room to fit an ATX motherboard. Mid-tower instance can likewise accommodate one ATX motherboard in most cases.

ATX form Factor (Full ATX)

Probably the most common kind factor because that a motherboard is the ATX type factor. The board is roughly 12″ x 9.6″ (30cm x 24cm).


Image 113.6 – ATX kind Factor

Mini ATX

A mini-ATX motherboard is a slightly smaller sized variation of the complete ATX dimension that procedures 11.2″ x 8.2″ (28cm x 21cm). The key difference in between ATX and mini-ATX is the variety of buses and possibly memory slot on the motherboard. Mounting holes for both are situated in the exact same place, do them interchangeable interchangeable in many cases. A instance that supports an ATX motherboard can likewise support mini-ATX motherboard.

Micro ATX

The micro-ATX kind factor is an even smaller variation of the ATX standard, with a maximum dimension of 9.6″ x 9.6″ (24cm x 24cm). The faceplate line approximately the specific same position as in all other versions the ATX. System instance that deserve to hold an ATX motherboard can additionally hold micro ATX motherboard. The smaller mid or mini tower situations would likely be too tiny for a full ATX motherboard yet should accommodate micro ATX motherboard. The state mini-ATX and also micro-ATX are often used interchangeably.


Image 113.7 – Micro ATX form Factor

Flex ATX

The dimension of Flex ATX is 9” x 7.5” (22,9 cm x 19,1 cm). That is derived from Micro ATX and is supplied in tiny computer cases.


Flex ATX form Factor

Mini ITX

Going under in size we have actually a mini ITX motherboard with a maximum dimension of 6.7″ x 6.7″ (17cm x 17cm). An alert that over there is a solitary expansion slot and the motherboard chin is substantially smaller than the ATX and even the micro ATX. Also notice that the faceplate still line up and also the hole positions still complement the ATX hole positions. About theory we can take this micro ITX motherboard and place it within a complete tower case. However we generally use a small kind factor instance for this motherboard.


Image 113.8 – Mini ITX type Factor


Em ITX dimensions room 17 centimeter x 12 cm.


Em ITX kind Factor

Nano ITX

Measures of Nano ITX are 4.7″ x 4.7″ (12 centimeter x 12 cm). The is supplied with smaller devices like set-top boxes, car PCs, media centers, and other embedded devices.


Nano ITX form Factor

Pico ITX

The size of the Pico ITX is 3.9” x 2.8” (10 centimeter X 7,2 cm).


Pico ITX kind Factor

Mobile ITX

Mobile ITX is the smallest form factor v the dimension of 2.4” x 2.4” (6 cm x 6 cm).


Mobile ITX kind Factor

The ATX kind factor and its variations space the most usual motherboard form factors.

DTX form Factor

DTX form factor is intended because that small kind factor PCs, and is behind compatible with ATX kind factor cases. Dimensions space 8” x 9.6” (20,3 centimeter x 24,4 cm).


DTX kind Factor

Mini DTX

Mini DTX is a much shorter version the DTX kind factor. Dimensions space 8” x 6.7” (20,3 centimeter x 170 cm).


Mini DTX type Factor


SSI kind factors were developed by SSI (Server mechanism Infrastructure) forum, and are intended for dual or multi processor motherboards supplied in servers and also or even workstations. SSI kind factors were acquired from ATX specification, therefore they have actually the very same rear panel, IO connector area, and also mounting holes. But, SSI kind factors are larger than ATX, for this reason SSI motherboards will certainly not fit situations designed for standard ATX. The computer situation has to be designed for bigger than traditional ATX type factor.Three SSI kind factors are CEB (Compact electronics Bay), EEB (Enterprise electronic devices Bay), and MEB (Midrange electronic devices Bay). The smallest of castle is SSI CEB, and also the dimension is 12” x 10.5” (30,5 cm x 26,7cm).



SSI CEB type Factor

SSI EEB (also referred to as Extended ATX or E-ATX)

SSI EEB dimensions space 12” x 13” (30,5 cm x 33 cm).


SSI EEB kind Factor


The SSI MEB dimension is 16.2” x 13” (41,1 centimeter x 33 cm). It is much longer in order to provide room for two added CPU sockets.


SSI MEB kind Factor

BTX type Factor

There space a couple of main differences with the BTX kind factor. Notice that the faceplate is on the contrary end. An additional difference is the the feet positions are different. Also, the processor socket is contempt rotated so that it is at an angle to the mechanism board. This rotation is to help in the airflow across the processor to aid in cooling the processor. The BTX motherboard will just fit in ~ a system instance that is designed for a BTX motherboard. In many situations this way that one ATX system situation will not work with a BTX device board, back there room system situations that space able come accommodate both the ATX and also the BTX type factors. The BTX kind factor has not been widely embraced despite its improvements over ATX and related standards. Together a result, the ease of access and variety of BTX-compatible materials is limited.


Image 113.9 – BTX form Factor

NLX type Factor

The NLX is an larger style type factor that is no used very often anymore. We could see the in part older motherboards yet it’s not likely to conference it with more recent motherboards.


Image 113.10 – NLX kind Factor

NLX is one older form factor offered for slimline desktop-style computers. NLX is an innovation over one even earlier LPX type factor. Notice that this motherboard has no development slots for the PCI or ISA bus. The NLX type factor is provided in slim line cases that are very short.


Image 113.11 – NLX v Riser Card

In order to accommodate expansion cards we usage a tab on the leaf of the motherboard. Us insert a Riser map on the finish of the motherboard. Riser map is then provided for expansion cards, so the now development cards lay flat rather 보다 being perpendicular come the motherboard. The riser map does not have integrated ports because that audio, joystick, USB, network or modem.

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When picking a system case, other than considering the dimension of the computer that we want, the most important thing is to complement the motherboard kind factor through the form factor supported by the computer system case. The most usual system case kind is the tower. Tower instances are: full tower, Mid tower and Mini tower. Slim line cases are just tower instances turned on their sideways. Small kind factor or SFF instances are custom situations that room designed to minimize the spatial volume the a desktop computer. The dimension of the motherboard is often dubbed the type Factor. The many common type factor because that a motherboard is the ATX type factor. Once considering the dimension of ATX we identify Full ATX, Mini ATX, Micro ATX, Flex ATX, Mini ITX, Em ITX, Nano ITX, Pico ITX, cell phone ITX. SSI CEB, SSI EEB, SSI MEB type factors are bigger than ATX. As soon as comparing with ATX, BTX kind factor has actually the faceplate on the opposite side, hole positions are different and the processor socket is contempt rotated. The BTX motherboard will just fit in ~ a computer instance that is designed for a BTX motherboard. The NLX is an older style kind factor the is no used really often anymore.