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What's the difference between ATX and ITX?

Author

Carter Sullivan

Updated on March 10, 2026

What's the difference between ATX and ITX?

What is the difference between ATX and ITX? ITX is a smaller board with less pci slots and less ram slots. You would use it if you were building a smaller form factor PC for traveling or to take to LAN parties. So the differences would be the size, amount of ram modules you can use, and number of expansion slots.

Beside this, what is the difference between ATX and ITX?

The most obvious difference is the difference in size, Standard ATX being the largest, and Mini ITX is the smallest. Motherboard form factors Courtesy Of VIA GALLERY. In this table, you can tell that the smaller motherboards are compatible with the larger form factor cases.

Furthermore, is there a difference between ITX and Mini ITX? 2. The micro-ATX has three sizes – standard, maximum, and minimum – while the mini-ITX has one standard, fixed size. 3. The micro-ATX can also be a substitute for a full-size ATX motherboard since all the components of both motherboards are the same.

Herein, is ATX better than ITX?

Micro ATX is the best choice in the majority of cases. Only go with ATX if you need more than 4 PCIe slots and only go with Mini ITX if you want the most compact PC that you can get.

What are the two main differences between an ATX and microATX board?

The standard ATX usually has up to seven slots for either PCI or PCI-Express. On the other hand, the micro ATX can only be expanded up to four slots. To make up for the limited slots, various peripherals are integrated. This also cuts down the need for expansion.

Should I get mATX or ATX?

Fortunately, mATX motherboards are perfect for budget-friendly gaming PCs, as they still have all of the main features that standard ATX motherboards have. The only real difference is that standard ATX motherboards offer better aesthetics, more PCIe slots, and beefier VRMs for overclocking.

Is an ITX build worth it?

I would not recommend an ITX build on a budget. You're paying a premium for small form factor that could be spent towards anything else. For the motherboard a bit, but mini GPUs sre usually the cheapest. The motherboards also tend to cost more.

Why is Mini ITX so expensive?

Because when things get small enough it starts to take a ton of planning to squeeze everything into the small space. Hence it pushes the price up. Also, mITX boards don't sell as high volumes, limiting how much mass production you can do. and that drives the price up too.

What is the most common ITX form factor?

Mini - ITX Form Factor

Are micro ATX bad?

There's nothing wrong with a Micro-ATX motherboard. Aside from lacking some expansion slots (PCI/PCI-E/RAM), many use the same chipsets as their ATX cousins and function just as well.

What does ITX mean?

Information Technology eXtended

Is it possible to determine the form factor without opening the case?

5. Is it possible to determine the form factor without opening the case? Answer: Yes, you could tell by seeing the size and shape of the case.

Can micro ATX fit in Mid Tower?

Full-tower and mid-tower cases both fit standard ATX motherboards—by far the most common motherboard size out there. Both can also fit smaller micro-ATX motherboards. Exact sizing varies from case to case, but most mid-towers run up to roughly 18 inches high and 8 or so inches wide.

What advantages does ATX have over microATX?

3) What advantages does ATX have over microATX? MicroATX is the advantage because of size that is usually much smaller than normal ATX and usually has fewer expansion slots like PCI, fewer DIMM sockets. They are often built around budget or low cost CHIPSETS.

Which motherboard size is best?

Motherboards come in three main sizes, from largest to smallest: ATX, Micro-ATX and Mini-ITX (Yes, Mini is smaller than Micro). You can use a smaller chassis with the micro or mini boards, but you'll have to settle for fewer PCIe slots, RAM banks and other connectors.

What does M mean in motherboard?

If "M" appears behind the chipset code, it is a mATX board. If "M" appears in front of the chipset number it means it is for an AMD processor, but has a non-AMD chipset. If the abbreviation in front of the chipset is "MA", it is for an AMD processor and has an AMD chipset.

Can ITX fit in ATX case?

Mini-ITX boards can therefore often be used in cases designed for ATX, micro-ATX and other ATX variants if desired. The design provides one expansion slot. Earlier motherboards conventionally have a standard 33 MHz 5V 32-bit PCI slot.

What does mATX stand for?

Micro ATX

Does Micro ATX affect performance?

No difference in performance. The difference is more PCIE slots and sometimes RAN slots. You can do SLI on microATX as well. My micro-atx build has great performance and temps- I put the money saved on motherboard, case and fans into buying a better CPU.

How do I choose the right motherboard?

Choosing a Motherboard
  1. Choosing a Motherboard.
  2. Form factor.
  3. Processor socket type.
  4. Choosing a motherboard.
  5. Choose the right chipset.
  6. Make sure the motherboard supports the exact processor you plan to use.
  7. Choose a board with flexible host bus speeds.
  8. Make sure the board supports the type and amount of memory you need.

Is Mini ITX bad?

mini itx is good in certain situations, albeit there are limiting factors. but as far as raw specs, theres no reason an itx build cant be as powerful as a simple (single gpu) atx build.

What is the smallest micro ATX case?

Smallest Micro-ATX Cases – Our Recommendations
AwardModel
Best Smallest Budget mATX CaseAntec Slim VSK2000-U3
Best Silent Smallest mATX CaseCoolerMaster Silencio S400
Best Versatile Value Smallest mATX CaseCoolerMaster MasterBox Q300L
Best Portable Value Small mATX CaseCoolerMaster MasterBox Q300P

Which is smaller Micro ATX or Mini ITX?

The micro ATX is at second largest at 244 by 244 mm. Finally, the smallest is the mini ITX, which is 170 by 170 mm. Of course, there's no sense in picking up a standard ATX motherboard if you're using a smaller case. Each form factor is designed to fit a standard size case.

Is ITX cheaper than ATX?

As for the pricing, the high-end ATX motherboards are usually pricier, but there is a good demand for mini-ITX motherboards in the market too, and since the design of these cases is unique, they cost a bit more than what should be the cost of such motherboards.

How could you tell whether a system was regular ATX Microatx or mini ITX?

Motherboard form factors are easily identified by their physical dimensions. An ATX motherboard size is 12 inches by 9.6 inches. A micro-ATX (mATX) motherboard measures 9.6 by 9.6 inches. A mini-ITX motherboard measures _6.

Will Micro ATX fit in mini ITX case?

Nope, micro-ATX is slightly larger than mini-ITX and due to the internal layout you wouldn't be able to mount the motherboard and close the sides of the case (plus the mounting holes issue). You'll need to find a different case if you want that motherboard or vice-versa.

What slimline form factor is similar to but not compatible with ATX?

What slimline form factor is similar to ATX? There are no similar form factors to ATX. Slimline form factors are NLX and LPX.

What size is ITX?

Mini-ITX specifies length to be 6.7 inches with width of 6.7 inches. It is the smallest form factor possible utilizing ATX mounting holes. All Mini-ITX motherboards use four (4) mounting holes, there are no known exceptions. This form factor is the smallest of all ATX motherboards.

Does motherboard form factor matter?

These standards apply regardless of whether you are using a CPU from Intel or AMD, but you will need to check that the motherboard you choose is compatible with and takes full advantage of the CPU that you've chosen. Motherboard size does matter and depends on the type of PC you are building.

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