Micro ATX Vs Mini ITX Vs ATX – What’s the Difference?

If you’re planning to build a new computer, you might be wondering what the differences between Micro ATX and Mini ITX are. These two sizes of PCs are often used for similar purposes. They have similar form factors, but their size and power requirements differ. Read on to find out the advantages and disadvantages of each one. Also, learn the power supply and motherboard best for your particular application.

Power Consumption

Generally speaking, micro-ATX motherboards have four PCIe slots. However, the mini-ITX motherboards typically only have one PCIe slot. Because of the small size of both form factors, they are not ideal for heavy-processing work. Mini-ITX motherboards are ideal for small desktop cases, but they are not ideal for overclocking the CPU.

For gaming purposes, Micro ATX is the best choice. This motherboard has nearly the exact specifications and features of ATX boards. Its size and price are both favorable. Its four PCIe slots and four RAM slots are sufficient for PC gaming. It also supports high-end graphics cards. It is an excellent choice for those looking for a small, affordable gaming PC.

The mini-ITX motherboard is more minor than the micro-ATX, but the features are not as robust. Although Mini-ITX motherboards are small and lightweight, they are powerful enough to run most modern games. Mini-ITX motherboards have fewer expansion slots and connectors than micro-ATX motherboards. However, these motherboards come with enough USB and SATA ports, so they are appropriate for gaming.

In addition to being smaller and lighter, the micro-ATX motherboard supports more features and processors. For example, the ITX motherboard has only two slots, while the micro-ATX motherboard has four. Modern micro-ATX motherboards can support up to eight RAM slots. They are also faster. The power consumption of micro-ATX motherboards is significantly lower than that of the mini-ITX.


If you’re planning on building a high-end computer, you’ll likely need an ATX or Micro ATX motherboard. However, there are significant differences between these two form factors. You should know the difference between them to choose the best motherboard for your needs. The first difference is size, with a standard ATX motherboard containing more PCIe lanes than a mini ITX. However, if you plan to use multiple PCIe input devices and GPUs, the mini ITX may be your best bet.

As the name suggests, Micro ITX and ATX motherboards are smaller and, therefore, cheaper. However, this site has its disadvantages. Mini ITX motherboards may not have enough room to fit the graphics card you want. As a result, you’ll likely have to buy an extra case if you want to install an ATX motherboard. This is especially true if you’re building a desktop PC.

The most significant difference between the two formats lies in PCI-Express slots. While Micro ITX motherboards only have one PCIe slot, their larger counterparts have three. In comparison, an ATX motherboard can accommodate up to five PCIe slots, while a Mini ITX motherboard can only have one. In terms of RAM, a Mini ITX motherboard offers up to 32GB, while an ATX motherboard has space for up to 64GB. There are also a few Micro ITX motherboards that offer up to 64GB of RAM. You can find some high-end ATX motherboards with as many as eight slots, but most of them don’t.

While the two sizes are similar, there are significant differences. The Micro ATX motherboard is smaller than the mini ITX but is slightly larger than its smaller counterpart. It has a width of 9.6 inches and a depth of 17.2 inches. The difference in size will make it much more difficult to fit many components into your system. A smaller micro ATX motherboard is better if you don’t want to pay too much for a large case.

Power Supply

Micro ATX and Mini ITX are both power supply sizes and share some of the same components. The most significant difference between the two is the form factor. The former is shorter and narrower, while the latter is more prolonged and profound. The Mini ITX standard has no defined power supply standard, though it recommends what might work best for each case. Both power supply sizes feature the same 20 or 24-pin “original ATX” connector, though Mini-ITX boards also use a DC-DC converter board to power them. These boards are usually supplied with a power adapter as well.

Power distribution: Micro ATX PSUs have power distribution designed for P4/XP systems. They also work for older PCs. The ATX12V 2. x power supply has a more balanced power distribution and is therefore recommended for PCs running earlier versions of Windows. However, you must note that an ATX12V 2. x power supply is required for systems with earlier P4/XP versions.

Power output: A Micro ATX power supply has three output voltages, including a Low-power -12 V output and a 5V standby voltage. Micro ATX power supplies are connected to the motherboard through a 20-pin connector to avoid accidental connections and remove the requirement to derive 3.3V from a 5V supply. Mini-ITX is used in low-power motherboards and small-form-factor computer architectures.

Micro ATX Vs. Mini ITX Vs. ATX - What's the Difference?

Size: Mini ITX motherboards are typically the most expensive. They cost an average of $60 and up, while Micro ATX motherboards can be purchased for under 50 dollars. Unless you plan on building a high-end, compact gaming PC, you may want to look at a Micro ATX motherboard. If your PC is going to be used primarily for gaming, you can opt for a Micro ATX motherboard.

Ports: When choosing a Power Supply, remember that micro ATX motherboards have fewer PCIe slots than standard ATX. Mini ITX boards have PCIe slots on edge, which may not be ideal for larger graphics cards. Fortunately, both types of motherboards share the same mounting points. A micro ATX motherboard will still support a full-size keyboard. There is a limited number of ports on a micro ATX motherboard.


The cost of a desktop PC can either be a Mini ITX or an ATX build. You can choose between either depending on your budget and personal needs. If you plan on gaming or working on advanced settings, a Mini ITX build is the better choice, while an ATX system is best for high-end workstations. Both motherboards have two slots for RAM, but an ATX model has more memory, expansion slots, and external media support.

Micro ATX motherboards have lower prices but lose functionality compared to their bigger siblings. Because Micro-ATX motherboards are compact, they are suitable for those who want a high-spec PC but are on a budget. The cost of an ATX motherboard is higher than a Micro-ATX one, but it’s well worth it if you’re looking to save space and maximize customization.

Although Mini ITX motherboards are less common, they still offer good performance. However, they don’t feature as many ports and slots as the Micro-ATX motherboards. Micro-ATX motherboards are also cheaper because they are less expensive to manufacture. However, the cost of a build with an ATX motherboard will soon exceed the cost of the other parts. This is because the Mini-ITX motherboards are generally less popular.

A micro-ATX motherboard is ideal for personal use if you need a cheap board and aren’t concerned with adding extra components. However, if you need multiple GPUs or a multi-GPU system, you should consider an ATX motherboard. The micro-ATX motherboard is not ideal as it only has one slot, and you’ll need additional PCIe expansion slots.

Another difference between Micro ATX and Mini ITX motherboards is their RAM. Compared to the ATX version, a Mini ITX motherboard has only two RAM slots. This means you’ll need to buy new RAM for it. Mini ITX boards only support 64 GB of RAM, while most ATX motherboards support 128 or 256 GB of RAM. However, a Mini ITX motherboard may be more efficient in terms of performance.