Motherboard Sizes: Understanding E-ATX, ATX, mATX, and mini-ITX When building a PC, choosing the right motherboard size is crucial for ensuring compatibility, upgradability, and performance.

Motherboard sizes explained There are four motherboard sizes available in 2025 from major manufacturers such as Asus, Gigabyte, and MSI, among others. These are Mini-ITX, MicroATX, ATX, and E-ATX.

Both are E-ATX motherboards with shared features such as one-touch overclocking and RGB lighting. The ROG Strix X399-E and Prime X399-A support 3-way SLI and Crossfire configurations.

BIOSTAR B660MX-E PRO Micro-ATX Motherboard The B660MX-E PRO motherboard comes with a full rear I/O panel considering its Micro-ATX form factor, with ample connectivity options for day-to-day use.

The B650MP-E features a wide range of USB and connectivity options on its rear I/O with 4x USB 3.2 (Gen1) ports, 1x USB 3.2 (GEN2) port, 1x USB 3.2 (GEN2) Type-C port and 2x USB 2.0 ports.

Check the manual (if available) on sites like Manuals+ to ensure your CPU is on the compatibility list of the motherboard. With older server motherboards, it can often be hard to pin down exact CPU ...

ASRock's X670E Taichi jams in about everything you'd want from an AMD AM5 motherboard for years to come. Just be sure that this big E-ATX board fits in your case—and your budget.

Testing Chieftec's APEX ATX case, I used the Intel Core i5 12600K on a Z690 AORUS Pro motherboard. For the memory, two DDR5 sticks of Corsair Dominator Platinum RGB ran at DDR5-7200M/T.

The full tower case has plenty of room for today's most powerful components (max compatibility specs to follow, below) so as well as an E-ATX motherboard you will be able to pack in a 420mm liquid ...

You see, the EATX motherboard is noticeably larger than the ATX. In most cases, a standard ATX motherboard will measure around 12 by 9.5 inches, while an EATX motherboard measures 12 by 13 inches.

Micro-ATX form factor Support for AMD AM5 Ryzen 7000 CPUs 16+2 Phase Design with 110A per stage DDR5 RAM, dual channel up to 2 DIMMs (up to 64GB) 1x onboard M.2 slot (PCIe Gen 5) 2x M.2 slots on ...

We feel that Asus have done a pretty good job with the A7V266-E. It's well presented, has a multitude of features and is a champion in the stability stakes. The layout of the board is generally ...