B350 vs X470: Which Motherboard Is Better?

The B350 and X470 chipsets are both AMD AM4 motherboards, but the X470 is the better choice for most builders today because it offers newer features, better power delivery, and broader CPU support. The B350 was a solid budget option when it launched in 2017, but the X470 (released in 2018) improves on it in nearly every meaningful way, especially if you plan to use a Ryzen 3000 or 5000 series processor. Below, we break down the differences, compatibility, and real-world performance so you can decide which one fits your build.

Background: The AM4 Chipset Lineup

AMD introduced the AM4 socket in 2016, and it quickly became a favorite for its longevity and value. The chipset determines which features the motherboard exposes to the CPU, such as PCIe lanes, USB ports, SATA ports, and overclocking support. The B350 was the mid-range option at launch, paired with the first-generation Ryzen CPUs. The X470 arrived a year later as a refresh of the high-end X370, designed for second-generation Ryzen processors. Both use the same AM4 socket, but they differ in the number of PCIe lanes, USB ports, and other I/O options.

Key Differences: B350 vs X470

The most important differences come down to PCIe lanes, USB support, and power delivery. The X470 offers more PCIe 3.0 lanes (16 from the CPU plus 8 from the chipset) compared to the B350’s 16 CPU lanes and 6 chipset lanes. For most users, this means the X470 can support more M.2 NVMe drives and add-in cards without bottlenecking. The X470 also adds native USB 3.1 Gen2 (10 Gbps) support, while the B350 only has USB 3.1 Gen1 (5 Gbps). In practice, this means faster file transfers to external drives and faster charging for compatible devices.

Power delivery is another major factor. X470 boards generally have more robust VRM (voltage regulator module) designs with more phases and better heatsinks. This matters if you plan to overclock your CPU or use a high-core-count processor like the Ryzen 7 2700X or Ryzen 9 3900X. The B350 boards, especially budget models, can struggle with sustained loads on these CPUs, leading to thermal throttling or instability.

Compatibility and CPU Support

Both chipsets support the same AM4 CPUs, but the BIOS updates are where they diverge. B350 boards received updates to support Ryzen 3000 and 5000 series, but many older boards lack the BIOS flashback feature, meaning you need an older CPU to update the BIOS first. X470 boards, being newer, often shipped with BIOS versions that supported Ryzen 2000 out of the box and had more room for later updates. AMD officially supported Ryzen 5000 on both B350 and X470, but some B350 boards were dropped from the list due to limited BIOS ROM size. If you want to use a Ryzen 5000 CPU, check the motherboard manufacturer’s website for the specific BIOS version required. In general, X470 has a smoother upgrade path.

Overclocking and Performance

Both chipsets allow CPU overclocking, but the X470’s superior power delivery gives it a clear edge. On a B350 board, overclocking a Ryzen 5 1600 to 3.8 GHz might be fine, but pushing a Ryzen 7 2700X to 4.2 GHz could cause VRM temperatures to spike. X470 boards typically have better heatsinks and more phases, so they can handle higher currents without overheating. In terms of memory overclocking, both support DDR4-3200+ with the right CPU and BIOS, but X470 boards often have better memory trace layouts, which can help achieve higher frequencies and tighter timings. For gaming, the difference is negligible—both will run a GTX 1080 or RTX 2080 at the same frame rates—but for productivity tasks like video editing, the X470’s extra PCIe lanes can help if you use multiple NVMe drives.

How to Choose Between B350 and X470

When deciding, consider your budget, CPU, and future plans. Here are the main factors:

• CPU: If you have a Ryzen 5 1600 or 2600, a B350 board is fine. If you plan to use a Ryzen 7 or 9, go with X470.
• Overclocking: If you want to squeeze every bit of performance, X470’s better VRMs are worth the extra cost.
• Storage: If you need more than one M.2 NVMe drive or want to use a PCIe 4.0 drive (on X470 with a Ryzen 3000/5000 CPU), X470 is the safer bet.
• USB speed: If you transfer large files to external SSDs, X470’s USB 3.1 Gen2 is a real benefit.
• Budget: If you’re on a tight budget and have a low-power CPU, a used B350 board can save money, but be aware of BIOS update requirements.

Common Problems and Misconceptions

One common misconception is that the X470 supports PCIe 4.0. It does not—that requires a 500-series chipset (like X570) or a B550. The X470 only supports PCIe 3.0, but that’s still plenty for most GPUs and NVMe drives. Another issue is BIOS update confusion: many B350 boards require a first-generation Ryzen CPU to update the BIOS before they can run a Ryzen 3000 or 5000 chip. If you buy a used B350 board, you might need to source an old CPU or use a BIOS flashback button (if available) to get it working. On X470, the situation is slightly better, but you still need to update the BIOS for Ryzen 5000 support. Always check the motherboard’s support page for the latest BIOS and any warnings about CPU compatibility.

Cost and Value in 2025

As of 2025, both chipsets are considered legacy. New B350 and X470 boards are rarely sold, so you’ll likely be buying used. On the used market, B350 boards can be found for as little as $30–$50, while X470 boards typically go for $70–$100. The price difference is small, but the X470 offers better future-proofing and stability. If you’re building a budget PC with a Ryzen 5 3600 and don’t plan to overclock, a B350 board can work, but you’ll need to verify BIOS compatibility. For most builders, the X470 is worth the extra $20–$30 because it avoids the BIOS headache and gives you more features.

Frequently Asked Questions

Can I use a Ryzen 5000 CPU on a B350 motherboard?

Yes, but only if the motherboard manufacturer has released a BIOS update for that specific model. AMD allowed B350 boards to support Ryzen 5000, but not all manufacturers provided updates for all boards. Check the support page for your exact model. If the BIOS is not updated, you’ll need a compatible older CPU to boot and flash the new BIOS.

Does X470 support PCIe 4.0?

No, the X470 chipset only supports PCIe 3.0. PCIe 4.0 requires a 500-series chipset (X570, B550) or a newer platform. If you want PCIe 4.0 for a fast NVMe SSD or a future GPU, you’ll need to look at those boards.

Which is better for overclocking, B350 or X470?

X470 is better for overclocking because it typically has more VRM phases and better cooling. This allows it to deliver stable power to high-core-count CPUs like the Ryzen 7 2700X or Ryzen 9 3900X. B350 boards can overclock, but they may throttle under heavy loads.

Can I use a B350 motherboard with a Ryzen 7 5800X?

Yes, if the BIOS is updated. However, the B350’s VRM may not be able to handle the 5800X’s power draw, especially under all-core loads. This can lead to thermal throttling or system instability. It’s recommended to use a B450 or X470 board for 8-core or higher CPUs.

What is the difference between B350 and X470 in terms of USB ports?

X470 has native support for USB 3.1 Gen2 (10 Gbps), while B350 only has USB 3.1 Gen1 (5 Gbps). This means faster data transfer to external SSDs and other devices. X470 also has more total USB ports on the chipset.

Is it worth upgrading from B350 to X470?

If you’re upgrading your CPU to a Ryzen 3000 or 5000 series and want to overclock, yes. The X470 offers better power delivery, more PCIe lanes, and faster USB. If you’re happy with your current CPU and don’t need these features, the upgrade isn’t necessary.

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