Micro-ATX motherboards sit in a sweet spot that full-tower enthusiasts often overlook: they offer nearly all the connectivity of a standard ATX board in a smaller footprint, and they typically cost less too. This guide is aimed at UK builders putting together compact desktop PCs on a tight budget, whether that is a first AMD Ryzen build, an Intel 12th or 13th Gen office machine, or a home-theatre PC that needs to fit inside a slimmer case. For a broader overview of options beyond this form factor, see our guide to the best motherboards available in the UK. Since last year, prices on A520 and B550 AMD boards have dropped noticeably as AM5 takes hold, making now an excellent time to pick up a capable AM4 platform for very little money. Intel's H610 chipset boards have also matured, with DDR4 variants now widely available under £55. We have filtered the catalogue to include only genuine Micro-ATX form-factor motherboards, removing anything that does not fit the brief.
Quick Verdict
Best Overall: MSI B550M PRO-VDH WIFI, for its combination of Wi-Fi, solid VRM, and broad Ryzen 5000 support at a price well under £75. Best Value: Gigabyte A520 AORUS ELITE, which punches above its price with a robust feature set for a basic AM4 build.
The MSI PRO H610M-E DDR4 is the strongest Intel option in this round-up, designed for builders who want a reliable LGA1700 platform for 12th, 13th, or 14th Generation Intel Core processors without committing to a B660 or higher chipset board. It is a particularly good fit for office and productivity builds where stability and long-term driver support matter more than overclocking headroom.
The H610 chipset is Intel's entry-level option for the Alder Lake and Raptor Lake generations, and it does impose some limitations. Memory overclocking is not supported, so you are locked to DDR4-3200 as the maximum rated speed, and the board only has two DIMM slots rather than four, capping maximum RAM at 64 GB. For most everyday builds using 16 GB or 32 GB of RAM, neither of these restrictions will cause any practical problems. The lack of XMP support does mean you should buy DDR4-3200 rated kits rather than paying a premium for faster memory that will run at 3200 anyway.
Where the PRO H610M-E DDR4 earns its place is in its build quality and feature set relative to its price. MSI has equipped it with a 6+1+1 phase VRM design with a heatsink, which is more robust than many H610 competitors. This means even a Core i5-12400 or i5-13400, which draws around 65 W under load, will not stress the board. The single M.2 slot runs at PCIe 4.0 x4 for 12th and 13th Gen CPUs, enabling fast NVMe storage without a speed penalty. Four SATA 6 Gbps ports are available for additional storage.
The rear I/O includes two USB 3.2 Gen 1 Type-A ports, four USB 2.0 ports, HDMI 2.1, and DisplayPort 1.4, which is a good combination for a modern office machine. There is no VGA output, so very old monitors will need an adapter. The audio uses Realtek ALC897, which is a slight step up from ALC887 and adequate for office use. There is no Wi-Fi included, so wireless connectivity requires a PCIe card or USB adapter.
The UEFI BIOS is MSI's familiar Click BIOS 5 interface, which is one of the more user-friendly options for beginners, with clear labelling and a good fan control section. The board is compatible with Intel's 14th Gen CPUs out of the box on recent BIOS versions, making it a longer-term platform than it might initially appear. For a budget Intel build that prioritises reliability and straightforward setup, this is the board to choose.
Verdict: The best Intel Micro-ATX board under £75, with a solid VRM, PCIe 4.0 M.2 support, and a user-friendly BIOS that suits first-time builders.
Pros
- Compatible with 12th, 13th, and 14th Gen Intel CPUs, extending the platform's lifespan
- PCIe 4.0 M.2 slot delivers full-speed NVMe performance with modern SSDs
- MSI Click BIOS 5 is one of the most beginner-friendly UEFI interfaces available
Cons
- Only two DIMM slots, limiting RAM expansion compared to four-slot boards
- No memory overclocking support due to H610 chipset restrictions
- No Wi-Fi or Bluetooth included, requiring a separate adapter for wireless setups
The ASUS Prime A520M-K is the most straightforward entry-level AMD board in this round-up, aimed squarely at builders who want a reliable platform for a Ryzen 3 or Ryzen 5 processor at the lowest possible cost. It is a sensible choice for a first PC build, a budget office machine, or a secondary computer where advanced features are unnecessary.
ASUS has kept the specification lean to hit the price point. The board uses a 4+3 phase VRM without a dedicated heatsink, which means it is best suited to processors with a TDP of 65 W or below. A Ryzen 5 5600 at 65 W is entirely comfortable here, but a Ryzen 7 5800X at 105 W would push the VRM harder than is advisable for sustained workloads. For the target audience of budget builders using mainstream Ryzen 5 chips, this is not a concern in practice.
Memory support covers DDR4 up to 4733 MHz via overclocking, with two DIMM slots and a maximum capacity of 64 GB. The two-slot limitation is the most notable constraint compared to four-slot boards, as it means you cannot start with two small sticks and add more later. Most builders will install their final RAM configuration at the outset, so this is manageable, but it is worth factoring into your purchasing decision. A single M.2 slot running at PCIe 3.0 x4 handles NVMe storage, and four SATA 6 Gbps ports are available.
The rear I/O includes USB 3.2 Gen 1 Type-A, USB 2.0, HDMI 2.0, and VGA. The presence of VGA is useful for pairing with older monitors, though the absence of DisplayPort is a minor limitation for multi-monitor setups. Audio is handled by Realtek ALC887, which is functional for everyday computing. The ASUS UEFI BIOS is clean and well-regarded, with ASUS's Fan Xpert technology available for basic fan curve management.
One practical advantage of the ASUS Prime range is the brand's reputation for BIOS updates and long-term support. ASUS was among the first manufacturers to release Ryzen 5000 BIOS updates for A520 boards, and the Prime A520M-K received them promptly. The board ships with two SATA cables and a brief setup guide. For a no-frills AMD build on a strict budget, it does the job reliably.
Verdict: A dependable entry-level A520 board from a trusted brand, best suited to 65 W Ryzen 5 builds where simplicity and reliability matter most.
Pros
- ASUS's reliable BIOS update track record ensures Ryzen 5000 compatibility is well-supported
- VGA output adds compatibility with older monitors that lack HDMI or DisplayPort
- Clean UEFI with Fan Xpert for basic fan curve management
Cons
- VRM lacks a heatsink, making it unsuitable for 105 W Ryzen 7 or Ryzen 9 processors
- Only two DIMM slots, preventing incremental RAM upgrades
- No DisplayPort output limits multi-monitor flexibility
The Gigabyte H610M H V3 DDR4 is the most affordable Intel board in this round-up and a strong option for builders who want a compact LGA1700 platform for a 12th, 13th, or 14th Gen Intel Core processor without spending more than necessary. It suits home office builds, light gaming machines, and anyone upgrading from an older Intel platform who wants a modern socket without a large outlay.
The H610 chipset keeps costs down by restricting overclocking and limiting PCIe lane allocation, but for a build centred on a Core i3 or Core i5 processor with a mid-range discrete GPU, these restrictions are largely irrelevant. The board supports DDR4 memory up to 3200 MHz in two DIMM slots, with a maximum capacity of 64 GB. As with the MSI PRO H610M-E DDR4, the two-slot configuration means you should plan your final RAM setup from the start rather than expecting to expand incrementally.
The single M.2 slot runs at PCIe 3.0 x4 for 12th Gen CPUs, which is a step behind the MSI H610M-E's PCIe 4.0 support. In practical terms, this means a PCIe 4.0 NVMe drive such as a Samsung 980 Pro will be capped at PCIe 3.0 speeds, roughly 3,500 MB/s sequential read rather than 7,000 MB/s. For everyday computing and gaming, this difference is rarely noticeable in real-world use, but it is worth knowing if you are investing in a high-end SSD. Four SATA 6 Gbps ports provide additional storage options.
The rear I/O includes USB 3.2 Gen 1 Type-A ports, USB 2.0, HDMI 2.0, and VGA. The VGA output is useful for legacy monitor compatibility, and the HDMI 2.0 port supports 4K at 60 Hz for integrated graphics output. There is no DisplayPort, which is a minor limitation. Audio uses Realtek ALC897, which is adequate for office use and casual listening. No Wi-Fi is included.
Gigabyte's UEFI BIOS on this board is functional and straightforward, with the EasyTune utility available for basic system monitoring. The board is compatible with Intel's 14th Gen CPUs on updated BIOS versions, which extends its useful life. Fan headers include one CPU fan and two system fan connectors. For a budget Intel build where the priority is getting a stable, capable platform at the lowest possible price, the H610M H V3 DDR4 delivers exactly that.
Verdict: The most affordable Intel Micro-ATX board in this list, well-suited to Core i3 and i5 builds where cost efficiency is the primary concern.
Pros
- Compatible with 12th, 13th, and 14th Gen Intel CPUs, offering good platform longevity
- VGA output provides legacy monitor compatibility alongside HDMI 2.0
- Lowest entry price for an Intel LGA1700 board in this round-up
Cons
- M.2 slot limited to PCIe 3.0, capping NVMe speeds compared to the MSI H610M-E
- Only two DIMM slots with no memory overclocking support
- No Wi-Fi, Bluetooth, or DisplayPort output
Buying Guide
What to look for in a budget Micro-ATX motherboard
Choosing a Micro-ATX motherboard under £75 involves a series of trade-offs, and understanding them upfront will save you from buying the wrong board for your build.
Chipset: A520 vs B550 for AMD, H610 for Intel
For AMD AM4 builds, the A520 chipset is the budget option, locking you to PCIe 3.0 across all slots and limiting overclocking to AMD EXPO memory profiles. The B550 chipset adds PCIe 4.0 on the primary M.2 and x16 slots, which matters if you are buying a modern NVMe SSD. If you are pairing the board with a Ryzen 5 5600 and a mid-range GPU, B550 is worth the small premium. For Intel LGA1700 builds, H610 is the only chipset available at this price point, and it restricts memory to its rated speed without XMP overclocking.
VRM quality and processor compatibility
The voltage regulator module (VRM) is the part of the motherboard that delivers clean power to the CPU. Budget boards with weak VRMs can throttle performance or fail under sustained load with higher-TDP processors. As a rule of thumb, boards with fewer than four power phases and no VRM heatsink should be limited to processors with a 65 W TDP or below. If you plan to use a Ryzen 7 5700X or a Core i5-12400F, look for a board with at least six phases and a heatsink on the VRM section.
RAM slots and memory support
Two-slot boards are common at this price and are perfectly adequate if you buy your final RAM configuration at the outset. Four-slot boards give you more flexibility to start with 8 GB and add more later, or to run four sticks for aesthetic symmetry. Check the maximum supported speed, as some A520 boards cap out at DDR4-3200 in practice even if the spec sheet lists higher figures.
M.2 slots and storage
Most boards under £75 include one M.2 slot. If you want to run two NVMe drives without using SATA ports, look specifically for a dual-M.2 board such as the MSI B550M PRO-VDH WIFI or Gigabyte B550M DS3H AC R2. Check whether the M.2 slot runs at PCIe 3.0 or 4.0, as this affects the maximum speed of your SSD.
What is the downside of Micro-ATX?
Micro-ATX boards typically offer fewer PCIe slots than full ATX boards, which limits multi-GPU setups and the number of expansion cards you can install. They also tend to have fewer USB headers and fan connectors, which can be restrictive in larger cases with many fans. However, for the vast majority of single-GPU builds, these limitations are irrelevant.
Are Micro-ATX boards cheaper than ATX?
Generally, yes. Micro-ATX boards use less PCB material and fewer components, which reduces manufacturing costs. At the budget end of the market, the price difference between an mATX and ATX board on the same chipset is typically £10 to £20. This makes mATX an attractive option for cost-conscious builders who do not need the extra slots of a full ATX board.
Is Micro-ATX less performance than ATX?
No, not in any meaningful sense for a typical single-GPU gaming or productivity build. The CPU, RAM, and GPU perform identically regardless of the motherboard form factor. The only scenario where ATX might offer a performance advantage is if you are running multiple GPUs or a large number of PCIe expansion cards simultaneously, which is rare in consumer builds. For everyday use, an mATX board on the same chipset as an ATX board will deliver identical performance.
Can an ATX motherboard fit in a Micro-ATX case?
No. ATX boards measure 305 x 244 mm, while Micro-ATX boards measure 244 x 244 mm or smaller. An ATX board will not fit in a case designed for Micro-ATX. The reverse is possible: a Micro-ATX board can fit in a full ATX case, as ATX cases include mounting points for smaller form factors. Always check your case's supported motherboard sizes before purchasing.
The MSI B550M PRO-VDH WIFI is the overall winner in this round-up. It combines the practical advantages of the B550 chipset, including PCIe 4.0 M.2 support and a robust 6+2+1 phase VRM, with built-in Wi-Fi 5 and Bluetooth 5.0, all at a price that sits comfortably under £75. For the majority of AMD Ryzen builds in this budget range, it offers the best balance of current performance, future-proofing, and convenience. The Gigabyte A520 AORUS ELITE earns the Best Value title for those who do not need wireless connectivity and want to spend as little as possible on a capable AM4 platform. For Intel builders, the MSI PRO H610M-E DDR4 is the clear choice, with its PCIe 4.0 M.2 slot and broad CPU generation support making it a more complete package than the Gigabyte H610M H V3 DDR4 at a very similar price.
