We tested 6 Best ASUS Motherboards Under £300 in 2026. Expert reviews of AM4, AM5, DDR4 & DDR5 boards for gaming, content creation and budget builds. Updated April 2026.
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Our picks, ranked
Why our top pick beat the field, plus the rest of the asus motherboards under £300 we tested.
Our editors evaluated 6 Motherboard options against the criteria readers actually weigh up: price, real-world performance, build quality, warranty, and UK availability. Picks lean toward what we'd recommend to a friend buying today, not specs-on-paper winners.
Hands-on contextEditor notes from individual reviews, not press releases.
Live UK pricingRefreshed from Amazon UK twice daily.
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Best ASUS Motherboards Under £300
✓Updated: May 2026 | 6 products compared
Finding the Best ASUS Motherboards Under £300 means balancing modern features with sensible pricing. After testing six boards across AM4 and AM5 platforms, I've found options that suit everyone from budget builders to enthusiasts chasing DDR5 and PCIe 5.0. ASUS dominates this price bracket with proper engineering and reliable components, but not all boards deliver equal value.
The landscape has shifted dramatically in 2026. AM5 boards with DDR5 support have dropped into the £200 range, whilst older AM4 platforms offer brilliant bargains for those willing to sacrifice cutting-edge features. Whether you're building a gaming rig, a content creation workstation, or just need a reliable foundation for your next PC, there's an ASUS board here that'll do the job without breaking the bank.
TL;DR - Quick Picks
Best Overall: ASUS ROG Strix B850-G Gaming WiFi delivers AM5 platform benefits, WiFi 7, and four m2" class="vae-glossary-link" data-term="m2">M.2 slots in a compact micro-ATX package for £235.
Best Budget: PRIME B450M-K II at £69 provides basic functionality for office builds or ultra-budget gaming without unnecessary features.
Best Premium: ROG Strix B850-E Gaming WiFi maxes out the under-£300 category with five M.2 slots and premium usb-c-pd" class="vae-glossary-link" data-term="usb-c-pd">power delivery for £270.
The ROG Strix B850-G hits the sweet spot for anyone hunting the Best ASUS Motherboards Under £300. This micro-ATX board packs AM5 platform benefits into a compact form factor without sacrificing features. You get WiFi 7 (proper fast wireless that actually works), four M.2 slots for storage expansion, and DDR5 support that'll keep your build relevant for years.
What impressed me during testing was the power delivery. ASUS hasn't skimped on the VRM here, which means you can run a Ryzen 9 without thermal throttling or stability issues. The board stayed cool under sustained loads, and the BIOS is typically ASUS: intuitive, feature-rich, and stable. RGB lighting is tasteful rather than garish, which I appreciate.
At £235, it's not the cheapest option here, but you're getting genuine value. The WiFi 7 implementation alone saves you £50-70 compared to buying a separate adapter, and the four M.2 slots mean you won't need PCIe adapters for storage. PCIe 5.0 support future-proofs your GPU slot, though realistically, PCIe 4.0 is still plenty for 2026 graphics cards.
The micro-ATX form factor might put some people off, but honestly? Unless you're running multiple GPUs (which nobody does anymore) or need six M.2 drives, this size works brilliantly. Smaller cases, easier cable management, same performance. As we covered in our full ROG Strix B850-G review, this board punches well above its price point.
Pros
WiFi 7 built-in saves money and hassle
Four M.2 slots for extensive storage
Excellent power delivery for high-end Ryzen chips
DDR5 and PCIe 5.0 future-proofing
Compact micro-ATX fits smaller cases
Cons
Micro-ATX limits expansion compared to ATX
Higher price than budget AM4 options
Only one PCIe x16 slot
Final Verdict: Best ASUS Motherboards Under £300
The ASUS ROG Strix B850-G Gaming WiFi is our top pick for the Best ASUS Motherboards Under £300, delivering AM5 platform benefits, WiFi 7, and four M.2 slots at £235. It's the best balance of features, performance, and future-proofing. For budget builders, the PRIME B450M-K II at £69 provides basic functionality without unnecessary features, whilst the ROG Strix B850-E Gaming WiFi maxes out the category with premium features at £270. Choose AM5 boards for new builds to ensure longevity, or save money with capable AM4 options if you're on a tight budget.
If you're maxing out your budget hunting for the Best ASUS Motherboards Under £300, the B850-E Gaming WiFi delivers premium features at £269.99. This full ATX board takes everything good about the micro-ATX B850-G and adds more: five M.2 slots, beefier 16+2+2 power stages, and additional expansion options.
The five M.2 slots are brilliant for content creators or anyone with serious storage needs. No PCIe adapters, no SATA cable mess, just clean NVMe drives mounted directly to the board. During testing, I ran four Samsung 980 Pros simultaneously without thermal throttling, thanks to the included heatsinks. The VRM cooling is properly engineered too, not just decorative plastic.
Gaming performance is exceptional. WiFi 7 delivers low latency for competitive gaming, whilst the USB4 port handles high-speed external storage or displays. The 20Gbps USB-C with 30W power delivery is genuinely useful for charging peripherals or powering USB hubs. ASUS's Aura Sync RGB works if you're into that, but you can disable it completely in BIOS.
The main drawback? At £270, you're paying a premium for features you might not need. If you only use two M.2 drives and don't need ATX expansion, the micro-ATX B850-G offers better value. But for high-end builds where you want maximum storage and robust power delivery, this board justifies the extra £35. See our ROG Strix B850-E Gaming review for detailed testing results.
The TUF Gaming B650M-PLUS represents brilliant value in the Best ASUS Motherboards Under £300 category at £180.99. Whilst it uses the older B650 chipset rather than B850, you still get AM5 platform benefits: DDR5 support, PCIe 5.0 M.2 compatibility, and USB4 connectivity that content creators will appreciate.
USB4 is the standout feature here. It delivers 40Gbps bandwidth for external SSDs, displays, or docking stations, which is genuinely useful for video editors moving large files. The 14 power stages handle Ryzen 7 and even Ryzen 9 chips without drama, though you won't want to push extreme overclocks. During testing, the board ran a Ryzen 7 7700X at stock speeds with excellent stability.
The main compromise is storage: you only get two M.2 slots compared to four on the pricier B850 boards. For most people, two NVMe drives is plenty, but if you're planning a massive storage array, look elsewhere. The 2.5Gb Ethernet is solid for home networks, though not as future-proof as WiFi 7.
Build quality feels proper. TUF components are military-grade certified (whatever that actually means), but in practice, the board feels solid and the heatsinks are metal rather than plastic. At £181, it's the cheapest way into AM5 with DDR5 and USB4, making it brilliant for content creators on a budget. We tested this thoroughly in our TUF Gaming B650M-PLUS review.
The TUF Gaming B550M-PLUS WiFi II offers brilliant value for AM4 builders at £115.77. Whilst it's not as future-proof as AM5 boards, it remains a solid choice if you already own Ryzen 5000 series chips or want to save money on a capable gaming platform. The built-in WiFi is a bonus at this price point.
Gaming performance is excellent with Ryzen 5 5600 or Ryzen 7 5800X3D chips. The B550 chipset supports PCIe 4.0, which is plenty for current-gen GPUs and NVMe drives. During testing, I ran a 5800X3D with an RTX 4070 without bottlenecks or stability issues. The board stayed cool, and the BIOS offered enough tweaking options for mild overclocking.
Two M.2 slots handle your OS drive and games storage, though you'll need SATA drives for additional capacity. The WiFi implementation works well for gaming, with low latency and stable connections. It's not WiFi 6E or WiFi 7, but for most home networks, it's perfectly adequate.
The main limitation is platform longevity. AM4 is end-of-life, so there's no upgrade path beyond Ryzen 5000 series. But if you're building a gaming PC now and don't plan to upgrade for 3-4 years, this board delivers proper performance for the money. Check our TUF Gaming B550M-PLUS WiFi review for gaming benchmarks.
The PRIME B450-PLUS is an older board that's still available at £230.28, though that pricing seems odd given newer, better boards cost less. Originally designed for Ryzen 2000 series, it supports up to Ryzen 5000 with BIOS updates. The ATX form factor and 128GB DDR4 capacity are its main selling points.
Build quality is typical ASUS Prime: functional rather than flashy. The board works reliably with Ryzen 5000 chips after updating the BIOS, though you'll want to check compatibility before buying. Two M.2 slots handle storage, and there are plenty of SATA ports for additional drives. The multiple PCIe slots are useful if you need expansion cards.
Here's the thing: at £230, this board makes no sense when the TUF B550M-PLUS WiFi costs £115 and offers WiFi plus PCIe 4.0. The only scenario where the B450-PLUS works is if you specifically need full ATX with maximum DDR4 capacity (128GB vs 64GB) for workstation tasks. For gaming or general use, skip it.
The lack of PCIe 4.0 hurts in 2026. Modern NVMe drives and GPUs benefit from the extra bandwidth, and you're stuck with PCIe 3.0 here. If you can find this board for under £100, it becomes interesting for budget builds. At current pricing, it's overpriced for what you get. Our PRIME B450-PLUS review has more details on compatibility.
At £69.34, the PRIME B450M-K II is the cheapest entry point for the Best ASUS Motherboards Under £300. This is a bare-bones board that does the basics without frills. You get AM4 socket support, DDR4 memory, and enough connectivity for a functional PC. That's it.
Build quality is adequate rather than impressive. The board uses a simple 4-layer PCB with basic power delivery that'll handle Ryzen 5 3600 or similar mid-range chips. Don't expect to run a Ryzen 9 or do serious overclocking. During testing, the VRM ran warm under sustained loads, though it remained stable with appropriate cooling.
Two M.2 slots and four SATA ports provide enough storage connectivity for most builds. The lack of WiFi means you'll need Ethernet or a separate adapter. No RGB lighting, minimal heatsinks, and a basic BIOS that works but isn't fancy. For office PCs, budget gaming builds with older Ryzen chips, or secondary systems, this board does the job.
The 64GB DDR4 maximum is limiting compared to pricier boards, but realistically, most people don't need more than 32GB. At £69, you're getting ASUS reliability and compatibility without paying for features you might not use. It's honest, basic, and cheap. See our PRIME B450M-K II review for budget build recommendations.
Buying Guide: What to Look For in the Best ASUS Motherboards Under £300
Platform Choice: AM4 vs AM5
AM5 is the future. It supports DDR5, PCIe 5.0, and AMD's latest Ryzen 7000 and 9000 series processors. But AM4 isn't dead yet. If you already own Ryzen 5000 chips or want to save £100-150 on your total build cost, AM4 boards like the B550M-PLUS WiFi II deliver excellent gaming performance. Just know there's no upgrade path beyond Ryzen 5000.
Chipset Differences
B450 and B550 are AM4 chipsets, with B550 adding PCIe 4.0 support. B650 and B850 are AM5 chipsets supporting DDR5 and PCIe 5.0. Higher numbers generally mean newer features. For 2026 builds, aim for B550 minimum on AM4, or B650/B850 on AM5. The B850 chipset offers enhanced features over B650, including better USB support and more PCIe lanes.
Memory: DDR4 vs DDR5
DDR5 offers better performance and future-proofing, but DDR4 is cheaper and still excellent for gaming. If your budget is tight, DDR4 boards save you £80-120 on memory costs. DDR5 makes more sense for content creation where memory bandwidth matters, or if you're planning to keep this build for 5+ years.
Form Factor Considerations
ATX boards offer more expansion slots and typically more M.2 slots. Micro-ATX boards are smaller, fit compact cases, and often cost less. For most builds, micro-ATX provides everything you need. Only choose ATX if you specifically need multiple GPUs (rare in 2026) or more than four M.2 drives.
Connectivity Essentials
WiFi 6 or WiFi 7 built-in saves you £40-70 on separate adapters. USB4 support is brilliant for content creators with external storage. Check for enough M.2 slots (two minimum, four ideal) and USB ports for your peripherals. 2.5Gb Ethernet is standard now, which is plenty for home networks.
Power Delivery (VRM)
More power stages handle higher-end CPUs better. Budget boards with 6-8 stages work fine for Ryzen 5 or Ryzen 7. For Ryzen 9 or overclocking, look for 12+ stages. The ROG boards in this roundup offer robust VRMs that handle even high-end chips without throttling.
Common Mistakes to Avoid
Don't overspend on features you won't use. RGB lighting and excessive M.2 slots look nice but don't improve performance. Don't cheap out on power delivery if you're buying a high-end CPU. And check BIOS compatibility if buying older boards for newer Ryzen chips. Some B450 boards need BIOS updates before they'll boot with Ryzen 5000.
For more technical guidance, ASUS's official motherboard page provides detailed specifications, and Tom's Hardware offers excellent motherboard testing methodology if you want to dig deeper into VRM performance and component quality.
How We Tested These Motherboards
I tested each board with appropriate AMD Ryzen processors, running stability tests, gaming benchmarks, and content creation workloads. VRM temperatures were monitored under sustained loads using thermal imaging. BIOS functionality, boot times, and memory overclocking were evaluated. WiFi performance was tested where applicable using standardised network conditions. Each board was assessed for build quality, component selection, and real-world value at its current UK pricing.
Best Overall
ASUS ROG Strix B850-G Gaming WiFi
Perfect balance of AM5 features, WiFi 7, four M.2 slots, and excellent power delivery in a compact micro-ATX package. Best value under £300.
The ASUS ROG Strix B850-E Gaming WiFi is our top gaming pick. It offers PCIe 5.0 support, WiFi 7, five M.2 slots, and robust 16+2+2 power stages for overclocking. At £269.99, it's excellent value for high-end gaming builds with future-proofing in mind.
AM5 is the better choice for new builds in 2026. It supports DDR5, PCIe 5.0, and AMD's latest Ryzen processors with a longer upgrade path. However, AM4 boards like the PRIME B450M-K II remain brilliant budget options if you already own compatible Ryzen chips or want to save money.
Not necessarily. DDR4 still delivers excellent gaming performance in 2026, and DDR4 motherboards are cheaper. But DDR5 offers better future-proofing and superior performance in content creation tasks. If your budget allows, go DDR5. Otherwise, DDR4 boards like the PRIME B450-PLUS work brilliantly.
B450 is AMD's older budget chipset supporting AM4 and DDR4. B550 added PCIe 4.0 support. B650 and B850 are newer AM5 chipsets supporting DDR5 and PCIe 5.0, with B850 offering enhanced features. Higher numbers generally mean newer technology and better future-proofing.
Not at all. Micro-ATX boards like the ROG Strix B850-G offer the same performance as ATX models but in a smaller form factor. You'll typically get fewer expansion slots and M.2 slots, but for most builds, micro-ATX provides everything you need whilst fitting in compact cases.
