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B450 vs B550 vs X570 - Which AMD Motherboard Should You Buy?

We look at AM4 socket B450, B550 and X570 motherboards for AMD's Ryzen CPUs to find the best value and most popular boards for gaming PC builds


B450 vs B550 vs X570 - Which AMD Motherboard Should You Buy?


Back in October we reviewed the very popular Intel LGA 1200 boards - the B560, H570 and Z590 - and despite the shiny AM5 releases, it seems only fair to look over the AM4 range. There's a very high probability that we'll continue to see the usual price drops from AMD as the newer technology gains momentum, so for those on a budget, AM4 will still be the way to go for a while.

AM4 Socket Compatibility

AM4 motherboards are quite special in the grand scheme of things, because AMD recognise their long lifespan in the market, and the fact consumers spend a lot of money on them. AMD have stated that they will support the AM4 socket with 3D V-Cache processors - a huge plus for anyone who are spending their money on these boards. Another positive is that AMD will ensure backwards compatibility support for AM4 CPU coolers on the AM5 platform, so that expensive Ryzen CPU cooler you purchased for an AM4 processor was an investment rather than a mistake.

AM4 3D V-Cache

The Ryzen 7 5800X3D was the first processor getting the stacked memory treatment within its package. AMD was originally benchmarking a 15% performance boost thanks to the on-chip memory, which translated to gamers enjoying 15% higher FPS. The 5800X3D left the Ryzen 9 5900X behind on gaming performance, and - according to all trustworthy benchmarks - significantly ahead of the Intel Core i9 12900K, smoking the Alder Lake on frame rates. Having the layer of memory baked into the chip means the GPU is not taxed as often or as much, and games don't need to dip into VRAM for performance boosts.


Ryzen 7 5800X3D

Ryzen 7 5800X3D


AM4 Motherboards

Some advice on the interwebs will tell you to forgo that AM4 socket build, and choose AM5. Back in Jan 2022, you would have had a difficult decision to weigh up - go with the new tech or stick with AM4 for a budget build?

Whilst AM4 components and hardware were still selling throughout 2022, it is important to know why AMD are advising switching up to the new AM5 motherboards - it comes down to the motherboard BIOS. There is insufficient memory afforded to the BIOS, so data required for processor evolution cannot be stored, and this has resulted in the discontinuation of support on certain platforms.

So... Who Needs AM4?

Of course, smart PC builders know that the market price of discontinued, refreshed, and previous generation hardware usually goes down and provides some excellent value, depending on the workload the PC will be undertaking. Some gamers do not require a future-proof system, such as competitive or E-Sports gamers, MMORPG players, or designers. A powerful PC is a powerful PC to these consumers, and it comes down to budget, GPU and processing power required.

The 15% increase in performance may mean very little to a gamer who doesn't have any desire to get over 120FPS in Age of Empires, or a 3D animator who is happy sacrificing ten seconds in render time, and saving hundreds of pounds in the process.

B450 vs B550 vs X570 Specifications


B450 vs B550 vs X570


  AMD Athlon™ Processors with Radeon Graphics AMD Ryzen™ 2000 Series Processors with Radeon™ Graphics AMD Ryzen™ 2000 Series Processors AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics AMD Ryzen™ 3000 Series Processors AMD Ryzen™ 5000 Series Processors
X570 N N N Y Y Y
B550 N N N N Y Y
B450 Y Y Y Y Y Selective Beta BIOS update needed

B450 vs B550 vs X570 Features

PCIe 4.0 Support

A PCIe 4 capable motherboard is going to be essential as we move forward with other hardware upgrades, regardless of processor, so here the B450 falls short with just PCIe 3 support. The B550 has reduced PCIe 4 support, and the X570 offers more in terms of PCIe 4 and PCIe 3 support, splitting four slots over both interfaces equally.

USB 3.1 Connectivity

The B450 lacks support for USB 3.1 Gen2, having USB 3.1 Gen1 support only and 6 ports, which means you only have data speeds of 5Gbits per second. The B550 has 2x USB 3.1 Gen2 (10Gbits/s data speeds) and 6x USB 3.1 Gen1. The X570 is at the top end, with up to 8x ports USB 3.1 Gen2 and 4x ports on Gen1.

SATA Ports

As we've been saying for some time, the SATA ports on motherboards are never going to waste, with the best storage option being an SSD for your Operating System, most-played games and essential applications and relying on SATA III large capacity storage. Although NVMe presents a hard to resist speedy interface, SATA is still pretty fast for most needs.

The B450 and B550 both have 6 SATA ports, and the X570 offers an additional 2 ports for a total of 8 SATA III.

CPU Overclocking Support

All of these AMD AM4 motherboards have overclocking support; the X570 has more VRMs to control the voltage sent to components, avoiding exceeding their max voltage capabilities, and improved onboard cooling. This would suggest that the X-series are better for overclocking.

Low-End vs Mid-Range: B450 vs B550

Out of the gate there's the case for PCIe 4 with the B550, and this will matter to most PC users, whether it's for NVMe drives with their transfer rates of 7GB/s, or a mighty RTX GPU to get a nominal ~5% uplift (according to some sources).

Network speeds are also noticably different, with the B550 having 2.5Gbps, which is more than twice as much as the B450 platform which is limited to 1Gbps.

Other areas where the B550 excels is, as discussed, in enhanced USB connectivity, better lighting options, and having support for HD/surround audio. The other thing to remember is the price between a B450 and B550 is not such a leap, with around £25 - £30 separating them.

Mid-Range vs High End: B550 vs X570

The main differences with the mid-range and high-end pitched boards are connectivity and PCIe support, as well as there being Wi-Fi support on X570 motherboards. Most manufacturers will throw in a few extra letters or words to distinguish between their X570 motherboards, but the ones to take notice of are the -E suffix; X570-E has Wi-Fi 6 and 2.5g LAN whereas the -F has no Wi-Fi and only 1g LAN. -S has been rumoured to stand for "Silent", but some of the suffixes and prefixes should be counted as branding only, and very few actually mean anything. The only true way of finding out what extras you get over other models/manufacturers is to check the spec.

The price differences between the B550 and the X570 can be quite high, depending on the vendor. Even prices between vendors for the X-series can be quite high.

Now we're into 2023, the data we have gathered for these Am4 motherboards is vast. Each of the motherboards below appear in the top 20 AM4 motherboards sold in the whole of 2022, and are highly recommended by both our customers and PC review sites. With durable monsters like the ASUS TUF and MSI's solid Tomahawk line, there is serious quality available without being out of the budget scope of most PC builders.

Discontinued/End of line

The B450 is for serious budget watchers, because the B550 offers that much more as an all-rounder (gaming, workstation, design etc.), and if you want to have the most from the three chipsets, the X570 means a nominal extra spend.

For most retailers, there is no upside to stocking a B450 chipset motherboard as an end of line hero - which is why you will need to look at the second hand market to get one of these motherboards.


  • Gigabyte B550 AORUS ELITE AX V2 AMD Socket AM4 Motherboard
  • MSI B550M PRO-VDH WIFI AMD Socket AM4 Motherboard
  • MSI MAG B550 TOMAHAWK AMD Socket AM4 Motherboard


  • MSI MPG X570S CARBON MAX WIFI AMD Socket AM4 Motherboard
  • ASUS TUF Gaming X570-Plus (WI-FI) AMD Socket AM4 Motherboard
  • MSI MAG X570S TOMAHAWK MAX WIFI AMD Socket AM4 Motherboard


Is it worth upgrading to AM5?

If you have a penchant for playing Devil's Advocate, you can really go to town on the whole AM4 versus AM5 argument. We compared the latest generation Zen 4 range with Intel's latest and greatest processors, and the results were definitely food for thought.

Buying an AMD Ryzen 7 5800X3D Zen 3 CPU and MSI MPG X570S CARBON MAX motherboard would set you back MORE than the latest generation AMD Ryzen 5 7600 Zen 4 CPU and ASUS ROG Strix B650E-F. TechSpot's benchmarks across a massive 50 games showed that the AM5 upgrade was a smart move for gamers, with a majority 10% increase in framerate and game performance:

"There are just half a dozen examples where the 5800X3D was faster by a 10% margin or greater, capping out at a 15% margin. Meanwhile the 5800X3D was slower by a 10% margin or greater in 14 of the games tested, with the performance deficit topping out at 35%." - TechSpot

The answer to that question would be "Yes", and you should upgrade to AM5 as soon as possible. However, at the budget end or lower end of mid-tier gaming, you will absolutely be able to save a packet on both CPU and motherboard going with AM4; future-proofing be damned.

Last Word

As you can see, for price conscious PC builders, the AM4 still holds a lot of value and can be potentially paired with the exact amount of power the user requires, and rather than waiting for AM5 to rock up this year, the perfect gaming PC build could be sat on the shelves ready right now.

The decision, ultimately, should be made based on the length of time you plan to own the PC before upgrading, and if you require the extra bump in performance sooner rather than later. There are very few gamers, designers, and hardcore PC users who would say an X570, Ryzen 9 5950X and RTX graphics card is "insufficient" for the next 12 - 18 months of workload. Certainly, the future (and present) is bright if you have plans to build or upgrade in the next year and a half... but building now with and AM4 is far from a bad idea.