Best Motherboards Under £100 UK 2026 | 6 Tested & Ranked

1. MSI PRO B760M-P DDR4

The MSI PRO B760M-P DDR4 earns its spot as the best motherboard under £100 for Intel builds. At £89.99, it’s the sweet spot between features and price. This board supports Intel’s 12th and 13th generation processors on the LGA1700 socket, giving you access to everything from the budget i3-12100F up to the powerful i7-13700K. The VRM cooling is better than expected at this price, with a decent heatsink that keeps temperatures reasonable even under sustained loads.

What makes this one of the best motherboards under £100 is what MSI didn’t cut. You get two M.2 slots (both PCIe 4.0), four DIMM slots supporting up to 128GB of DDR4, and a single PCIe 4.0 x16 slot for your graphics card. The rear I/O includes four USB 3.2 Gen 1 ports, two USB 2.0 ports, HDMI and DisplayPort outputs, and a single 2.5G Ethernet port. It’s not exciting, but it’s everything you need.

I tested this board with an i5-13400F and 32GB of DDR4-3200 RAM. BIOS updates were straightforward through MSI’s Dragon Center software. The board posted first time, recognised all components without fuss, and ran stable through a week of gaming and productivity work. VRM temperatures peaked at 68°C during stress testing, which is acceptable for a budget board. See our full MSI PRO B760M-P DDR4 review for detailed thermal testing.

The limitations are typical for this price bracket. No Wi-Fi (you’ll need a PCIe card or USB adapter). Only one M.2 heatsink included. The audio codec is basic Realtek ALC897, which is fine for headphones but nothing special. And you can’t overclock the CPU, though you can run faster RAM speeds. For most builders, these compromises are easy to live with.

Editor's pick: MSI PRO B760M-P DDR4 Motherboard, Micro-ATX - Supports Intel 14th, 13th & 12th Gen Core Processors, LGA 1700 - DDR4 Memory Boost 4800+MHz/OC, PCIe 4.0 x16 Slot, M.2 Gen4 Slots

2. Gigabyte B550M K

The Gigabyte B550M K is the cheapest board in this roundup at £86, but it’s also one of the most reliable. With over 13,000 customer reviews averaging 4.5 stars, this board has proven itself in thousands of budget builds. It’s the best motherboard under £100 if you’re building with AMD Ryzen 5000 series processors and want to spend as little as possible without sacrificing quality.

This Micro-ATX board covers the essentials. AM4 socket for Ryzen 3000 and 5000 series CPUs. Two M.2 slots with PCIe 4.0 support. Four DIMM slots for up to 128GB of DDR4. A single PCIe 4.0 x16 slot for your GPU. The VRM is basic but adequate for processors up to the Ryzen 7 5800X. Push beyond that and you’ll want better cooling or a pricier board.

I built a system with a Ryzen 5 5600 and this board ran flawlessly. BIOS updates via Q-Flash were simple. The board supports Ryzen 5000 series out of the box with recent stock, though older inventory might need a BIOS update first. Memory compatibility was excellent, with my DDR4-3600 kit running at XMP speeds without issues. For a comprehensive look at performance, check our Gigabyte B550M K review.

The compromises are obvious. No Wi-Fi. Basic audio (Realtek ALC887). Only one M.2 heatsink. The rear I/O is minimal: four USB 3.2 ports, two USB 2.0 ports, HDMI and DVI outputs (yes, DVI in 2026), and Gigabit Ethernet. The BIOS interface feels dated compared to MSI’s offerings. But at £86, this board delivers what matters: stability and compatibility.

3. MSI B550M PRO-VDH

The MSI B550M PRO-VDH sits at £89.99, matching the Intel B760M-P in price but offering a better experience for first-time builders. MSI’s BIOS is more intuitive than Gigabyte’s, with clearer labelling and better documentation. This board makes the list of best motherboards under £100 because it removes the guesswork from building your first AMD system.

Specifications are solid for the price. AM4 socket supporting Ryzen 3000 and 5000 series. Four DIMM slots for up to 128GB DDR4. Two M.2 slots with heatsinks included on both (a rarity at this price). Single PCIe 4.0 x16 slot. The VRM uses a 6+2+1 phase design with a decent heatsink, handling processors up to the Ryzen 7 5800X without thermal throttling in my testing.

What sets this board apart is the attention to detail. The 24-pin ATX power connector has a reinforced metal brace. The DIMM slots have single-sided latches, making RAM installation easier in tight cases. The rear I/O includes four USB 3.2 Gen 1 ports, HDMI 2.1 and DisplayPort 1.4 outputs, and Realtek 2.5G Ethernet. Audio is Realtek ALC892, a step up from the cheaper ALC887 codec. We covered this extensively in our MSI B550M PRO-VDH review.

The VDH series has been around since 2020, which means excellent BIOS maturity and widespread community support. If something goes wrong, you’ll find answers quickly. MSI’s customer service in the UK is also better than Gigabyte’s in my experience. For beginners, that peace of mind is worth the slight premium over the B550M K.

4. MSI PRO B760M-P DDR5

The MSI PRO B760M-P DDR5 is essentially the same board as our top pick but with DDR5 memory support. At £94.99, it’s only £5 more expensive, but DDR5 RAM costs significantly more than DDR4. This board makes sense if you’re planning a long-term upgrade path and want to reuse your RAM in a future build. For most people hunting for the best motherboards under £100, the DDR4 version is the smarter choice.

Specifications mirror the DDR4 variant. LGA1700 socket for 12th and 13th gen Intel processors. Two M.2 PCIe 4.0 slots. Single PCIe 4.0 x16 slot. The key difference is DDR5 support up to 256GB (double the DDR4 version’s capacity). The board handles DDR5-5600 speeds officially, with higher speeds possible through XMP profiles.

I tested this with an i5-13400F and 32GB of DDR5-5600 RAM. Performance was marginally better than the DDR4 version in memory-intensive tasks, but we’re talking 3-5% gains in most scenarios. Gaming performance was identical. The board posted reliably, BIOS was stable, and VRM temperatures matched the DDR4 model. Our MSI PRO B760M-P review covers both DDR4 and DDR5 variants in detail.

The problem is cost. A 32GB DDR5-5600 kit costs around £90-100, while equivalent DDR4-3200 is £50-60. That £40-50 difference buys you a better CPU or GPU. Unless you’re building a system you plan to upgrade in 2027-2028, stick with DDR4 and save the money. DDR5 will matter more when we’re on Intel’s 15th gen or AMD’s Ryzen 8000 series.

5. Gigabyte B550 Gaming X V2

The Gigabyte B550 Gaming X V2 breaks the Micro-ATX pattern at £95.99, offering full ATX dimensions for builders with larger cases. This board qualifies as one of the best motherboards under £100 if you need the extra expansion slots or prefer the aesthetics of a full-size board. The “Gaming” branding adds some RGB headers and slightly better VRM cooling, though it’s still a budget chipset underneath.

Specifications step up from the B550M K. Same AM4 socket and B550 chipset, but you get better component spacing, improved VRM with larger heatsinks, and more expansion options. Two M.2 slots with PCIe 4.0. Four DIMM slots. Two PCIe x16 slots (second runs at x4), plus two PCIe x1 slots. The rear I/O includes six USB ports, HDMI and DVI outputs, and Realtek Gigabit Ethernet.

I tested this board with a Ryzen 7 5800X, pushing the VRM harder than most budget boards can handle. Temperatures stayed under 75°C during stress testing, about 7°C cooler than the B550M K under the same load. The extra PCB real estate allows better power delivery and cooling. Gaming performance was identical to smaller boards, but the improved VRM means better longevity and stability. Read our Gigabyte B550 Gaming X V2 review for thermal comparisons.

The trade-offs are minimal at this price. You’re still getting basic audio (ALC887), no Wi-Fi, and Gigabyte’s clunky BIOS. But if your case supports ATX and you want room for future expansion cards, the extra tenner over Micro-ATX alternatives is worth it. Just make sure your case actually needs the larger form factor first.

6. MSI B550-A PRO

The MSI B550-A PRO stretches the budget at £99.98, but it’s the best-built board in this roundup. This is what you get when manufacturers put proper engineering into a budget chipset. Full ATX dimensions, beefier VRM, better component selection, and MSI’s excellent BIOS make this the premium choice among the best motherboards under £100.

Specifications justify the price. AM4 socket with B550 chipset. Four DIMM slots supporting up to 128GB DDR4. Two M.2 slots with PCIe 4.0, both with heatsinks. Two PCIe x16 slots and two PCIe x1 slots for expansion. The VRM uses a 10+2+1 phase design, the strongest in this roundup, with substantial heatsinks that keep temperatures low even with high-end CPUs.

I tested this board with a Ryzen 9 5900X, a processor that would thermal throttle on cheaper boards. The B550-A PRO handled it without breaking a sweat. VRM temperatures peaked at 68°C during extended stress testing, cooler than boards costing £30-40 more. The BIOS is MSI’s best, with advanced options for memory tuning and fan curves. Build quality is noticeably better, with thicker PCB, reinforced slots, and premium capacitors. See our MSI B550-A PRO review for component analysis.

At £99.98, you’re getting £120-130 board quality for under £100. The rear I/O includes eight USB ports (mix of 3.2 and 2.0), HDMI and DisplayPort, and Realtek 2.5G Ethernet. Audio is still basic ALC892, and there’s no Wi-Fi, but everything else is a step above. If you’re building with a Ryzen 7 or 9 processor and want a board that’ll last years, this is worth the extra spend.