The ASUS Prime A520M-K is a basic Micro-ATX motherboard for AMD’s AM4 socket that runs Ryzen 5000, 5000 G, 4000 G and 3000 series desktop processors. It is a sensible, low-frills base for an office PC, a home desktop or an entry-level gaming build with a Ryzen 5 or Ryzen 7 chip, as long as you accept the A520 chipset’s limits: no CPU overclocking, PCIe 3.0 only, two memory slots and a single M.2 slot.
Our short verdict: buy it if you want a simple, compact AM4 board and you plan to leave your CPU at stock settings. Skip it if you want PCIe 4.0, four RAM slots or USB-C. Above all, check the BIOS version, because several popular Ryzen 5000 chips were validated only on later BIOS releases.
This article is based on ASUS’s official specifications and CPU support list, AMD’s chipset documentation and published coverage, checked on 17 October 2026. We have not tested this motherboard hands-on.
Quick verdict
- Best for: budget Ryzen builds, office and home PCs, small Micro-ATX cases, first-time builders using a Ryzen 5000 G-series APU without a graphics card
- Skip if: you want CPU overclocking, PCIe 4.0 SSD speeds, more than two RAM slots or plan to run a Ryzen 9 at sustained heavy loads
- Key strengths: wide AM4 CPU support on current BIOS, M.2 slot with PCIe 3.0 x4 NVMe, four SATA ports, HDMI and D-Sub outputs for APUs, four USB 3.2 Gen 1 ports on the rear
- Key limitations: A520 chipset (no CPU overclocking, PCIe 3.0 only), two DIMM slots, one M.2 slot, only two fan headers, no rear USB-C, no DisplayPort
ASUS Prime A520M-K key specifications
| Specification | ASUS Prime A520M-K (official ASUS spec page) |
|---|---|
| Socket | AMD AM4 |
| Supported CPUs | Ryzen 5000, 5000 G, 4000 G, 3000 and 3000 G series (check the ASUS CPU support list) |
| Chipset | AMD A520 |
| Memory | 2 x DDR4 DIMM, dual channel, up to 64GB unbuffered |
| Memory speeds | 2133 MT/s up to 5100 MT/s (OC), depends on CPU and modules |
| Graphics outputs | 1 x HDMI (4K at 60Hz), 1 x D-Sub (VGA) |
| Expansion slots | 1 x PCIe 3.0 x16 (from CPU), 2 x PCIe 3.0 x1 (from chipset) |
| M.2 | 1 x M.2 Key M (2242/2260/2280), PCIe 3.0 x4 and SATA modes |
| SATA | 4 x SATA 6Gb/s, RAID 0, 1, 10 |
| LAN | Realtek RTL8111H 1Gb Ethernet |
| Audio | Realtek 7.1 HD audio codec |
| Rear USB | 4 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0 Type-A |
| Front USB headers | 1 x USB 3.2 Gen 1 header (2 ports), 2 x USB 2.0 headers (4 ports) |
| Fan headers | 1 x 4-pin CPU fan, 1 x 4-pin chassis fan |
| CPU power | 8-pin +12V |
| BIOS | 256Mb flash ROM, UEFI AMI BIOS, EZ Flash 3, CrashFree BIOS 3 |
| OS support | Windows 11, Windows 10 (64-bit) |
| Form factor | Micro-ATX, 22.6 x 22.1 cm |
Check the current price of the ASUS Prime A520M-K on Amazon.in.
What the A520 chipset means in practice
AMD’s AM4 chipset comparison lists A520 as the only one of its A520, B450 and B550 chipsets with overclocking disabled. You cannot raise the CPU multiplier or tune CPU voltages on the Prime A520M-K. For buyers who run a Ryzen 5 or Ryzen 7 at stock, this matters little, because Ryzen chips already boost automatically within their limits.
The second limit is PCIe generation. AMD lists A520 as PCIe 3.0 for both the graphics slot and NVMe storage, while B550 offers PCIe 4.0 for those two links when used with a supported Ryzen processor. A PCIe 4.0 graphics card or SSD will still work here, but at PCIe 3.0 speed, which mainly caps the sequential speed of a fast PCIe 4.0 NVMe drive.
Memory is a slightly different story. ASUS lists memory support from 2133 MT/s up to 5100 MT/s with overclocking, so loading a DDR4 XMP/DOCP profile is part of what the board is designed for. Very high speeds depend on the CPU and the kit, so a mainstream kit from ASUS’s memory QVL is the safer choice.
CPU support and BIOS versions: the part to get right
ASUS publishes a CPU support list for the Prime A520M-K that shows which BIOS version each processor was validated from. A board from older stock may ship with an older BIOS than your CPU needs. Selected entries (checked 17 October 2026):
| Processor | Validated since BIOS |
|---|---|
| Ryzen 5 5600X, Ryzen 7 5800X, Ryzen 9 5900X, Ryzen 9 5950X | 1004 |
| Ryzen 5 5600G, Ryzen 7 5700G, Ryzen 3 5300G | 1401 |
| Ryzen 5 5500, Ryzen 5 5600, Ryzen 7 5700X, Ryzen 7 5800X3D | 2423 |
| Ryzen 3 4300G, Ryzen 5 4600G, Ryzen 7 4700G | 2423 |
| Ryzen 5 5600GT, Ryzen 5 5600X3D, Ryzen 7 5700X3D, Ryzen 9 5900XT | 2803 |
| Ryzen 3 3200G, Ryzen 5 3400G, Athlon 3000G | 2803 |
| Ryzen 5 5500F | 3621 |
If you pair the board with a newer chip such as the Ryzen 5 5600, Ryzen 7 5700X3D or Ryzen 5 5500F, it must already be on that BIOS version or later. The ASUS spec page lists EZ Flash 3 and CrashFree BIOS 3 for updates and recovery, but it does not list a USB BIOS FlashBack-style button that updates firmware without a CPU installed. EZ Flash 3 runs from inside the BIOS, so the system has to boot first. If your CPU is newer than the installed BIOS, you may need an older supported CPU, or help from the seller or an ASUS service centre, to update it.
Also note that the Prime A520M-K is an AM4 board. It does not accept AMD’s newer AM5 processors such as the Ryzen 7000 and 9000 series, and it uses DDR4 rather than DDR5 memory.
Storage and expansion
The board has one M.2 slot (Key M) that accepts 2242, 2260 and 2280 drives and supports both PCIe 3.0 x4 NVMe and SATA M.2 SSDs. ASUS lists PCIe 3.0 x4 and SATA modes for this slot with Ryzen 5000, 4000 G and 3000 series processors, so confirm your exact CPU on ASUS’s page if you are using an older 3000 G-series APU or an Athlon. With one M.2 slot, a second fast drive has to be a 2.5-inch SATA SSD or a hard disk on one of the four SATA 6Gb/s ports, which support RAID 0, 1 and 10.
Expansion is one PCIe 3.0 x16 slot from the CPU for a graphics card and two PCIe 3.0 x1 slots from the chipset for add-ons. There is no onboard Wi-Fi or Bluetooth, so plan for a PCIe or USB adapter if you cannot use Ethernet.
Display outputs, USB and rear panel
The rear panel has one HDMI port (ASUS lists 4K at 60Hz) and one D-Sub (VGA) port. They work only with a CPU that has integrated graphics, such as the Ryzen 5 5600G or Ryzen 7 5700G. A non-G chip like the Ryzen 5 5600 needs a graphics card. There is no DisplayPort or DVI.
The rear also has four USB 3.2 Gen 1 (5Gbps) Type-A ports, two USB 2.0 ports, a PS/2 combo port, Gigabit Ethernet and three audio jacks. ASUS lists no USB-C port or front USB-C header, so a cabinet’s front USB-C port will not work with this board.
Power delivery, cooling and build
ASUS lists DIGI+ VRM, an aluminium heatsink and its 5X Protection III features, including LANGuard, overvoltage protection and a stainless-steel rear I/O. Hardware site HWCooling’s A520 roundup lists the Prime A520M-K with a 4+2 phase VRM design and a 4+4-pin EPS connector.
As an entry board with a modest power design and no CPU overclocking, the Prime A520M-K makes most sense with mainstream six- and eight-core Ryzen chips. If you plan to run a 12- or 16-core Ryzen 9 under long, heavy workloads, a better-equipped B550 board is the safer choice.
There are only two 4-pin fan headers, one for the CPU cooler and one for a case fan, so a cabinet with three or more fans needs a splitter or a built-in fan hub.
Who should buy the ASUS Prime A520M-K
- Budget office or home PC builders using a Ryzen 5000 G APU without a graphics card
- Entry-level gamers pairing a Ryzen 5 with a budget graphics card at stock settings
- Anyone replacing a failed AM4 board in a Ryzen 3000 or 5000 system
Who should skip it
- Users who want PCIe 4.0 SSD or graphics speeds (look at B550)
- Anyone who wants four RAM slots or more than 64GB
- Builders who need USB-C, DisplayPort or onboard Wi-Fi
- Ryzen 7000 or 9000 buyers, who need an AM5 board
Alternatives worth comparing
ASUS Prime A520M-A II: same A520 chipset and one PCIe 3.0 x4 M.2 slot, but ASUS adds DisplayPort 1.2 alongside HDMI and D-Sub, useful for an APU with a DisplayPort monitor.
ASUS Prime B550M-K: the B550 step-up, with four DIMM slots (up to 128GB), two M.2 slots, PCIe 4.0 for the x16 slot and first M.2 slot with Ryzen 5000 and 3000 series CPUs, and two USB 3.2 Gen 2 rear ports. The logical upgrade if you want overclocking or PCIe 4.0.
MSI A520M-A PRO: another A520 Micro-ATX board with two DIMM slots (up to 64GB), one M.2 slot with PCIe 3.0 x4 or SATA, four SATA ports and the same Realtek RTL8111H Ethernet controller. MSI lists HDMI 2.1 and DVI-D outputs and one PCIe 3.0 x1 slot instead of two.
Buying tips: what to check before you order
- Model name: confirm the listing says Prime A520M-K, not a similarly named A520 or B550 board
- BIOS version: if your CPU needs BIOS 2423, 2803 or later, ask the seller about the installed BIOS or keep an older supported CPU handy
- Graphics: if your CPU has no integrated graphics (no G suffix), budget for a graphics card
- Monitor ports: the board offers HDMI and VGA only, so check your monitor’s inputs
- RAM: buy a two-module kit at the capacity you need, since there are only two slots
- Warranty: check the warranty terms on the listing and keep the invoice for any ASUS India service claim
If those checks work for your build, see the ASUS Prime A520M-K listing on Amazon.in and confirm the exact model and seller details before ordering.
Frequently asked questions
Does the ASUS Prime A520M-K support Ryzen 5000 processors?
Yes. ASUS’s CPU support list includes Ryzen 5000 chips such as the Ryzen 5 5600, 5600X, Ryzen 7 5700X, 5800X3D and 5700X3D, but each is validated from a specific BIOS version (for example 2423 for the Ryzen 5 5600 and 2803 for the Ryzen 7 5700X3D), so the board must be on that BIOS or newer.
Can I overclock my CPU on the Prime A520M-K?
No. AMD’s A520 chipset does not support CPU overclocking. ASUS does list memory speeds up to 5100 MT/s with overclocking, so DDR4 XMP/DOCP profiles are supported, subject to your CPU and memory kit.
Does the Prime A520M-K support PCIe 4.0 SSDs?
A PCIe 4.0 NVMe SSD will work in the M.2 slot, but it runs at PCIe 3.0 x4 speed because the A520 chipset platform is limited to PCIe 3.0.
Can I use the HDMI port with a Ryzen 5 5600?
No. The HDMI and VGA outputs need a CPU with integrated graphics, such as a Ryzen 5 5600G or Ryzen 7 5700G. The Ryzen 5 5600 has no integrated graphics, so you need a separate graphics card.
How much RAM can the Prime A520M-K take?
Up to 64GB of DDR4 across two DIMM slots, in dual-channel mode, according to ASUS’s specifications.
Final thoughts
The ASUS Prime A520M-K covers the basics for a compact Ryzen 3000 to 5000 build. Its limits are clear: no CPU overclocking, PCIe 3.0 only, two RAM slots, two fan headers and no USB-C. Check the BIOS version against your CPU before you order. Check the current price of the ASUS Prime A520M-K on Amazon.in.
Related reading on GadgetSoch: Intel Core i5-12400F Review: A Six-Core Gaming CPU That Needs a Graphics Card and MSI RTX 4070 Ti Gaming X Trio 12G Review: Quiet, Big and Still Worth It?.
Sources
- ASUS Prime A520M-K technical specifications (checked 17 October 2026)
- ASUS Prime A520M-K CPU support list (checked 17 October 2026)
- AMD AM4 chipsets comparison (checked 17 October 2026)
- HWCooling: All motherboards with AMD A520 in one place
- ASUS Prime A520M-A II technical specifications
- ASUS Prime B550M-K technical specifications
- MSI A520M-A PRO specifications
