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ASRock B650M Pro RS vs ASUS Prime A520M-K: Comparison
ASRock B650M Pro RS vs ASUS Prime A520M-K: the max memory difference
Start with max memory, because it is the widest measured gap between them: ASRock B650M Pro RS 256 GB against ASUS Prime A520M-K 64 GB, 75% in favour of ASRock B650M Pro RS. Memory slots runs the same way, 4 on the ASRock B650M Pro RS versus 2 on the ASUS Prime A520M-K, another win for ASRock B650M Pro RS. M.2 slots runs the same way, 3 on the ASRock B650M Pro RS versus 1 on the ASUS Prime A520M-K, another win for ASRock B650M Pro RS. They differ on newest cpu family supported too, Ryzen 9000 on the ASRock B650M Pro RS versus Ryzen 5000 on the ASUS Prime A520M-K.
Who each one is for
The ASRock B650M Pro RS is the one to take for the most affordable current-generation AM5 builds, though it is not built for anyone who wants Wi-Fi included out of the box and builds that want a PCIe 5.0 x16 GPU slot. It also earns its place with builders who don't need a PCIe 5.0 GPU slot or built-in WiFi. Buy the ASUS Prime A520M-K for the most budget-conscious AM4 builds without overclocking ambitions and basic office or light gaming systems, though it is the wrong buy for anyone who wants four memory DIMM slots and builds that want CPU overclocking support.
What ASRock B650M Pro RS and ASUS Prime A520M-K have in common
The common ground is wider than the gap: form factor, platform, wi-fi onboard, sata ports and eps 12v configuration are identical here. They match on 2 further specifications as well.
Frequently asked questions
Do the ASRock B650M Pro RS and ASUS Prime A520M-K differ on chipset?
Yes. Chipset reads B650 on the ASRock B650M Pro RS versus A520 on the ASUS Prime A520M-K.
Is the Ethernet Port Count the same on the ASRock B650M Pro RS and ASUS Prime A520M-K?
It is. Both are listed at 1, so it is not a reason to pick one over the other.
Specs and benchmarks
Platform
- ASRock B650M Pro RS
- AMD
- ASUS Prime A520M-K
- AMD
Model Number
- ASRock B650M Pro RS
- B650M Pro RS
- ASUS Prime A520M-K
- Prime A520M-K
Socket
- ASRock B650M Pro RS
- AMD Ryzen 9000 / 8000 / 7000 series
- ASUS Prime A520M-K
- AMD Ryzen 5000 (non-X3D) / 4000G / 3000 series
Form Factor
- ASRock B650M Pro RS
- Micro-ATX
- ASUS Prime A520M-K
- Micro-ATX
Chipset
- ASRock B650M Pro RS
- B650
- ASUS Prime A520M-K
- A520
Newest CPU Family Supported
- ASRock B650M Pro RS
- Ryzen 9000
- ASUS Prime A520M-K
- Ryzen 5000
Memory Type
- ASRock B650M Pro RS
- 4x DDR5 DIMM, up to 256GB, dual-channel, DDR5-7200+ (OC), XMP/EXPOBest
- ASUS Prime A520M-K
- 2x DDR4 DIMM, dual-channel, up to 64GB, up to 5100 MT/s (OC)
Oldest CPU Family Supported
- ASRock B650M Pro RS
- Ryzen 7000
- ASUS Prime A520M-K
- Ryzen 3000
CPU Overclocking Supported
- ASRock B650M Pro RS
- Yes
- ASUS Prime A520M-K
- No
Memory Slots
- ASRock B650M Pro RS
- 4Best
- ASUS Prime A520M-K
- 2-50%
Max Memory
- ASRock B650M Pro RS
- 256 GBBest
- ASUS Prime A520M-K
- 64 GB-75%
M.2 Slots
- ASRock B650M Pro RS
- 3Best
- ASUS Prime A520M-K
- 1-67%
PCIe 5.0 Support
- ASRock B650M Pro RS
- Yes
- ASUS Prime A520M-K
- No
Wi-Fi Onboard
- ASRock B650M Pro RS
- No
- ASUS Prime A520M-K
- No
Max Memory Capacity
- ASRock B650M Pro RS
- 256 GBBest
- ASUS Prime A520M-K
- 64 GB
Max Rated Memory Speed
- ASRock B650M Pro RS
- 7200 MT/sBest
- ASUS Prime A520M-K
- 5100 MT/s
ECC Memory Support
- ASRock B650M Pro RS
- Unbuffered ECC
- ASUS Prime A520M-K
- None
M.2 Slots Onboard
- ASRock B650M Pro RS
- 3
- ASUS Prime A520M-K
- 1
SATA Ports
- ASRock B650M Pro RS
- 4
- ASUS Prime A520M-K
- 4
PCIe x16 Slots
- ASRock B650M Pro RS
- 2
- ASUS Prime A520M-K
- 1
Primary Graphics Slot Gen
- ASRock B650M Pro RS
- PCIe 4.0
- ASUS Prime A520M-K
- PCIe 3.0
Rear USB 5Gbps Ports
- ASRock B650M Pro RS
- 2
- ASUS Prime A520M-K
- 4
Rear USB 2.0 Ports
- ASRock B650M Pro RS
- 4
- ASUS Prime A520M-K
- 2
Vcore Power Stages
- ASRock B650M Pro RS
- 8
- ASUS Prime A520M-K
- Not officially disclosed by ASUS (entry-tier)
EPS 12V Configuration
- ASRock B650M Pro RS
- One 8-pin
- ASUS Prime A520M-K
- One 8-pin
Max Ethernet Speed
- ASRock B650M Pro RS
- 2.5 GbpsBest
- ASUS Prime A520M-K
- 1 Gbps
Ethernet Port Count
- ASRock B650M Pro RS
- 1
- ASUS Prime A520M-K
- 1
Wi-Fi Standard
- ASRock B650M Pro RS
- None
- ASUS Prime A520M-K
- None
Audio Codec
- ASRock B650M Pro RS
- Realtek ALC897, Nahimic enhancement
- ASUS Prime A520M-K
- Realtek 7.1 Surround Sound High Definition Audio CODEC
Expansion
- ASRock B650M Pro RS
- 1x PCIe 4.0 x16, 1x PCIe 3.0 x16 (x4 mode); 1x M.2 PCIe 5.0 x4, 1x M.2 PCIe 4.0 x4, 1x M.2 PCIe 4.0 x2; 4x SATA III; 1x M.2 Key-E (Wi-Fi optional)
- ASUS Prime A520M-K
- PCIe 3.0 x16 + 2x PCIe 3.0 x1
Connectivity
- ASRock B650M Pro RS
- 1x Rear USB 3.2 Gen2 Type-C (10Gbps), 1x Rear USB 3.2 Gen2 Type-A (10Gbps), 2x Rear USB 3.2 Gen1 (5Gbps), 4x Rear USB 2.0; M.2 Key E for optional WiFi module
- ASUS Prime A520M-K
- 4x SATA 6Gb/s
Networking
- ASRock B650M Pro RS
- Realtek RTL8125BG 2.5G LAN (WiFi optional via M.2 Key E)
- ASUS Prime A520M-K
- Gigabit LAN (no built-in WiFi)
Special Features
- ASRock B650M Pro RS
- 3x M.2 (1x Gen5, 1x Gen4, 1x Gen4 x2)
- ASUS Prime A520M-K
- 1x M.2 (NVMe)
Which one should you pick?
Choose ASRock B650M Pro RS if you want the higher memory slots (4 vs 2), the higher max memory (256 GB vs 64 GB) and the higher M.2 slots (3 vs 1).
Choose ASUS Prime A520M-K if you already have it on hand or find it at a lower price.
Price comparison
| Retailer | ASRock B650M Pro RS | ASUS Prime A520M-K |
|---|---|---|
| Newegg | View on Newegg | View on Newegg |
| Amazon | View on Amazon |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.