AMD has officially lifted the lid on its latest entry-level chipset designed for its Zen 2-based Ryzen 3000 and 4000 processors, the A520 chipset. Following AMD's mid-tier B550 chipset launch a few months back, A520 brings up the bottom of AMD's now fully-modernized chipset stack, dialing down on things like PCIe speeds to allow its board partners to build more budget-friendly Ryzen 3000/4000 motherboards.

Overall, A520 offers up to twenty-six available PCIe 3.0 lanes available when paired with a Ryzen 3000 processor, with twenty of these coming directly from the CPU. And, wasting no time, numerous vendors, including ASUS, ASRock, GIGABYTE, MSI, and Biostar have already unveiled some of their entry-level A520 boards.

A520 Chipset, The A-Team For Value

The Zen 2 architecture, which is the foundation of AMD's latest Ryzen series of processors, has been its most popular series of processors to date. One of the marquee features of the B550 and X570 chipsets is PCIe 4.0, which, although it hasn't been fully utilized in devices like video cards and storage at present, it is still a popular feature that users hope will future-proof their systems for years to come. The A520 chipset, in turn, drops support for PCIe 4.0 speeds entirely in favor of PCIe 3.0, which is relatively easier to wire for and gives extra scope for the motherboard vendors to save costs compared to B550 and X570. The chipset officially represents AMD's now current-generation entry-level pathway, and as always, is based around AMD's AM4 socket.

Overall, the limitation in PCIe speeds for A520 is board-wide. Along with the chipset itself being limited to PCIe 3.0 support for both downstream and upstream, Ryzen processors will cap their on-chip PCIe lanes to PCIe 3.0 speeds when paired with an A520 motherboard. Further cutting PCIe-related costs, with A520 AMD offers less scope for lane allocation compared to B550 and X570, which allows vendors reduce the number of components required. There are only a couple of avenues in which vendors can configure their boards, such as selecting between using two PCIe 3.0 x1 slots or two SATA ports. 

Meanwhile, A520 also supports a couple of different configuration options with the 4 high-speed storage lanes coming from the host CPU. This includes building a full-fledged PCIe 3.0 x4 M.2 slot, two PCIe 3.0 x2 M.2 slots, or a PCIe 3.0 x2 M.2 slot with two additional SATA ports.

  • CPU
    • x4 PCIe 3.0 NVMe
    • x2 PCIe 3.0 NVMe + 2 x SATA
    • x2 PCIe 3.0 NVMe + x2 PCIe 3.0 NVMe
  • Chipset
    • 4x PCIe 3.0 + 2x PCIe 3.0
    • 4x PCIe 3.0 + 2 SATA

The remaining PCIe lanes from the CPU, as always, are divided between a full-length PCIe 3.0 x16 slot, and a PCIe 3.0 x4 link between the CPU and the chipset.

As for USB connectivity, A520 offers support for up to four USB 3.2 G2 ports from the CPU. Meanwhile the chipset itself adds another USB 3.2 G2 port, two USB 3.2 G1 ports, and six USB 2.0 ports.

Processor Support

The A520 chipset has identical processor support to that of the mid-range B550 chipset, with official support for AMD's current Ryzen 3000 desktop processors as well as AMD's next-generation Ryzen 4000 processors. Like with the B550 chipset, some A520 boards come with video outputs, which all but confirms support for AMD's Ryzen 4000 APUs – especially seeing as how A520 doesn't officially support the earlier Ryzen 3000 or 2000 series APUs.

AMD AM4 Motherboard Support
AnandTech uArch A320 B350
X570 B550
Ryzen 4000 CPU Zen 3 X X Beta
Ryzen 4000 APU** Zen 2 X ?Beta
Ryzen 3000 CPU Zen 2 X Beta
Ryzen 3000 APU Zen+ X X
Ryzen 2000 CPU Zen+ X X
Ryzen 2000 APU Zen X X X
Ryzen 1000 CPU Zen X X X
Athlon A-Series * X X X X
Ryzen Pro CPUs follow their non-Pro equivalents
* Excavator or Carrizo
** Unknown - product not announced yet

The AMD Ryzen 3000 CPU stack starts at the Ryzen 3 3100 with four cores and eight threads, which is currently available for $99. This would be a very suitable processor to pair with an A520 motherboard, though more aspiring builders can use any of of the Ryzen 3000 desktop CPUs, including the goliath sixteen core Ryzen 9 3950X.

The Current A520 Motherboard Stack

Accompanying AMD's announcement of the A520 chipset, motherboard vendors have begun rolling out their respective A520 boards. The main form factor of choice for A520 thus far is Micro-ATX, with a couple of Mini-ITX boards including the ASRock A520M ITX/ac and the GIGABYTE A520I AC. Gigabyte also has the only full-sized ATX model announced so far, which is the GIGABYTE A520 Aorus Elite.

The GIGABYTE A520 Aorus Elite ATX Motherboard

A520 boards set to hit the market include some gaming themed models that primarily come from GIGABYTE with its Aorus models, as well as the ASUS TUF Gaming A520M-Plus. The solitary offering from Biostar is aimed at business and casual users with its A520MH V6.0.

The most feature-packed A520 model looks to be the GIGABYTE A520 Aorus Elite with four memory slots that support up to 128 GB of DDR4-4400 memory, a Realtek ALC1200 HD audio codec and an unspecified Realtek Gigabit Ethernet controller. It has two full-length PCIe 3.0 slots that operate at x16/x2, with three PCIe 3.0 x1 slots and a single PCIe 3.0 x4 M.2 slots with four SATA ports.

Announced AMD A520 Models (08/18)
Model Size
ASRock A520M Pro M-ATX
ASRock A520M ITX/ac M-ITX
ASUS Prime A520M-K M-ATX
ASUS Prime A520M-A M-ATX
ASUS TUF Gaming A520M-Plus M-ATX
Biostar A520MH V6.0 M-ATX
GIGABYTE A520 Aorus Elite ATX
GIGABYTE A520M Aorus Elite M-ATX
MSI A520M Pro-C Dash M-ATX

At present, we don't have MSRP pricing from any of the vendors, but we have reached out to each vendor individually, and we will update the above chart once we have the official pricing. It is likely that the vast majority of A520 boards will be below $150 due to B550 models starting at that price point. The A520 chipset is its most basic entry-level chipset for Ryzen 3000 processors.

Finally, today's A520 release is a hard launch, with Newegg and other retailers already offering boards for sale. Not every board vendor has their wares on shelves just yet – as is usually the case for low-end board launches, this is a very relaxed launch – but over the coming days and weeks we should see the remainder of the A520s trickle into retail shops.

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  • Carmen00 - Wednesday, August 19, 2020 - link

    PCIe 4.0 needs additional hardware for maintaining a good signal, so good luck to such hackers - I would be very surprised if such hardware is present on A520 motherboards. Excluding it would reduce cost and margins are already low in this segment.
  • PandaBear - Thursday, August 20, 2020 - link

    You cannot. The PCIe IP are different logics and you cannot just unlock it. You need license and import them from the verilog and then tape out a new chip in TSMC.
  • Beany2013 - Wednesday, August 19, 2020 - link

    Ah good. Now just to get the Zen2 APUs out in the wild for us mere mortals, and I might finally be able to justify upgrading my A8-3870K. Yes, really.

    I generally do internet, streaming video and some DXVK gaming on Linux (or I would, if I had a GPU capable of doing actual Vulkan....) so I don't need huge grunt, but something with modern turbo characteristics and less power use would be pretty nice. I reckon £200-£250 would get me something that would happily do me a few years, longer if I slot a GPU in later down the line if I fancy DXVKing Doom Eternal or something.

    I do like modern budget systems, they're really rather capable these days.

    Steven R
  • Spunjji - Wednesday, August 19, 2020 - link

    Isn't DOOM already based in Vulkan? And given that the first one was able to be ported to the Switch, I'd be surprised if Eternal wouldn't run quite nicely on an APU.
  • Beany2013 - Wednesday, August 19, 2020 - link

    Something something Linux, something something drivers, innit. My GPU is an R280, which is really a....7970 I think. Vulkan on Linux on that hardware just ain't happening.
  • Spunjji - Thursday, August 20, 2020 - link

    Oof, grim! And yes, you're right about the 280 being the rebranded 7970.
  • ET - Thursday, August 20, 2020 - link

    If you haven't yet been able to justify upgrading from an A8-3870K, I don't see why Zen 2 APUs would do that.

    In that price range you could have bought a 3400G + A320 or cheap B450 board + 16GB
  • ET - Thursday, August 20, 2020 - link

    Damn premature enter and lack of editing.

    ... 16GB of fast RAM. The difference in performance between an entry level Ryzen 4000G and the 3400G is minuscule, especially compare to the difference between the 3400G and the A8-3870K.
  • Spunjji - Wednesday, August 19, 2020 - link

    Glad to see it, but a little miffed by the stated lack of backwards-compatibility for even the 3-series APUs. I'll have to have a look at the manufacturers' pages to see if anyone's doing it unofficially, because I'd really like to pick up a board and CPU now with a view to upgrading with a 4000 series APU later, or maybe even one of the Zen 3 APUs when those roll around.
  • Spunjji - Wednesday, August 19, 2020 - link

    That would be a no for the two ITX models I'm interested in. Sad times!

    Oh well - probably gonna pick up a second-hand 2400G + motherboard and tweak it 'til it squeals instead.

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