How to choose a motherboard

A motherboard is the one part every other part has to agree with. It decides which processor can go in, which memory the build can take, how many drives and cards it can carry, and how big the case has to be. Most of that is not a contest — a board either accepts the parts you have or it does not, and one that does not is not a cheaper version of one that does. So the questions are worth taking in order of how hard they are to undo: socket, chipset, size, memory, then the connectors you will actually plug something into.

Start with the socket

The socket is the physical and electrical seat the processor drops into, and it is the first constraint on the whole decision because it is absolute. A chip fits the socket or it does not; there is no adapter and no setting. Pick the processor first and the socket follows from it, or pick the board first and you have picked the family of processors you are allowed to buy.

Socket is one of the fields a board has to state before it appears in our motherboard catalog at all — a board whose maker does not publish it was left out rather than filed under a socket inferred from its name. Where the two sides both record a socket, the CPU side and a board spell it with the same string, so comparing processor and board is reading, not translating. (The workstation and legacy board sockets have no curated processor page here yet.) Our desktop CPU guide covers the choice from the processor's end.

The chipset wires the board up

The chipset is the controller the rest of the board hangs off. It sets how many fast lanes reach the expansion and storage sockets, how many ports the rear panel carries, and whether the board allows the processor or the memory to be pushed past stock. It does not make the processor faster. Two boards on different chipsets, running the same chip at stock settings, are running the same chip.

That is why the chipset is a fit question rather than a grade. It marks out what the board can carry, and the ceiling you actually meet is the one on the parts you own. A board with more lanes than the build ever uses is not doing anything with them.

One recording detail is worth knowing, because it makes a board's name and its listed chipset disagree now and then. A chipset here is read as the literal string on the maker's specification page, mapped to the set of chipsets the catalog recognizes — never the suffix in the board's marketing name. Vendors publish "AMD B650" on the page for a board sold as a B650E, so that board is recorded as B650. Only a page that itself says X870E yields X870E.

Form factor: the size the case has to accept

Board size is a standard, so a case states which sizes it takes and a board states which size it is. Four are recorded here, and each is a smaller rectangle than the one above it, which is where the practical consequences come from.

Smaller boards give up slots, and they give them up in a specific order: expansion slots first, then memory slots. A Mini-ITX build is committing to one add-in card and, in practice, to reaching its memory target with two sticks. That is a real constraint rather than a downgrade — plenty of builds never use a second card — but it is worth settling before the case is bought, because the case and the board size have to be decided together.

Memory: type, slots, and the ceiling

Three memory figures are recorded for every board, and they answer different questions. The type — DDR4 or DDR5 — decides which kits are candidates at all, because the two are physically and electrically different and a board is built for exactly one of them. The slot count decides how many sticks fit. The maximum memory decides how far the board can be filled.

Slot count matters beyond the arithmetic. A four-slot board filled with two sticks leaves room to add two more later; the same capacity reached with four sticks does not, and it also asks more of the processor's memory controller, which is why kits are usually sold as matched pairs. Our guide to how much RAM a build needs covers the capacity side, and memory speed and latency covers what the numbers on a kit mean.

The one memory figure no board here carries is the top supported speed. Board makers state that ceiling as an open figure with a plus sign and an overclocking note attached, which does not name an exact number — so recording one would claim more than the source says, and the field is left empty on every board here rather than filled with the figure before the plus.

Slots, sockets and ports

The remaining counts are the ones a build runs out of, each recorded for every board.

• M.2 sockets hold NVMe drives, and the count here is storage sockets only — the small extra socket that holds a wireless card is never counted among them. Our guide to SSD form factors covers which drives these take.
• Full-length PCIe slots are the x16-length slots a graphics card or an expansion card goes into. They are counted from the maker's own per-slot listing rather than a summary heading, and a slot whose own line says it runs at x1 is not counted, however the heading above it is worded.
• SATA ports connect the older 2.5-inch and 3.5-inch drives, and they are what a build with several hard disks runs out of first. NVMe or SATA covers the difference between the two kinds of drive connection.

A board's PCIe generation is recorded too, and it means one specific thing: the generation of the primary full-length slot, the one the graphics card goes in. Boards do mix generations internally — a board can wire a newer generation to an M.2 socket than to the graphics slot — so this figure answers the graphics question and does not describe the whole board.

Networking and the rear panel

Wireless is recorded as a plain yes or no, and boards come both ways; the same board family is often sold in two versions that differ mainly in whether the wireless module is fitted. Wired networking is recorded as the speed of the fastest built-in port, so a board carrying both a fast port and an ordinary one reports the fast one. The number of USB Type-C ports counts the rear panel only — a board whose sole Type-C is an internal header for a case's front panel has none recorded, which is a statement about the rear panel and not about the board's cabling.

Those last three are fields a board's maker may or may not publish, so they appear on a board's page where a source stated them and are absent where none did. An absent row is a missing source, never a zero.

How boards are recorded here

Every figure above was read from the board maker's own specification page for that exact model — not a retailer listing, a review, or a wiki — and a model whose maker did not publish one of the required fields was dropped from the catalog instead of being filled in from a sibling board. That is why the required set is small and hard: socket, chipset, form factor, memory type, wireless, and the slot and capacity counts.

Prices are the other half, and boards are unusual here. Board makers do not publish a list price on their specification pages, so no board in this catalog carries one, and there is nothing to quote a discount against. What a board's page shows instead is what it has actually been selling for over time — a price captured repeatedly and read against its own history rather than against a number a maker or a merchant chose.

None of it is a test result. These are the figures a board is built to, and how it behaves with your parts, your firmware version and your case still takes a review of that board to settle.

Every motherboard in our catalog is on its own page, with those specs read from the maker's page and a price tracked over time where the board is sold.