Best ASUS Motherboards Under $100: 7 Spec-Based Picks
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Finding the best ASUS motherboards under $100 requires a careful look at the specs that matter most to your build. We compared 7 options based strictly on the specifications published on the listings. The ASUS Z790 Gaming Wi-Fi 7 ATX takes the top spot because it includes Wi-Fi 7 and PCIe 5.0 support. This guide helps you decide which board fits your CPU socket and case size without exceeding your budget.
Quick picks
The best fit for you
- You want the best overall Intel gaming board ASUS Z790 Gaming Wi-Fi 7 ATX It features Wi-Fi 7 and PCIe 5.0 for modern Intel LGA 1700 gaming.
- You need a budget-friendly AM5 ATX motherboard ASUS Prime A620-PLUS WIFI6 AM5 ATX This board offers DDR5 support and Wi-Fi 6 in a standard ATX size.
- You want a compact AM4 build with 1GbE ASUS Prime Micro ATX AM4 Motherboard It provides reliable PCIe 4.0 performance and dual M.2 slots for small cases.
- You need basic AM4 connectivity without wireless ASUS Prime A520M-K Micro-ATX Motherboard This straightforward Micro-ATX board suits simple builds that do not require wireless options.
- You want PCIe 5.0 with DDR4 memory ASUS Micro-ATX Intel DDR4 Wi-Fi Motherboard It delivers modern GPU connectivity and 2.5Gb networking on an LGA 1700 socket.
Our 7 picks
ASUS Z790 Gaming Wi-Fi 7 ATX
Best for: Intel LGA 1700 gaming builds
- CPU Socket
- LGA 1700
- Chipset
- Z790
- Form Factor
- ATX
- Memory Type
- DDR5
- PCIe Version
- PCIe 5.0
- M.2 Slots
- 3
View on Amazon: ASUS Z790 Gaming Wi-Fi 7 ATX Affiliate link
This ASUS Z790 Gaming motherboard supports Intel LGA 1700 processors and uses DDR5 memory. It features PCIe 5.0 lanes and Wi-Fi 7 connectivity. The ATX form factor fits standard cases. You get a Realtek 1Gb LAN port for wired networking. This board targets gaming users who need modern standards and fast wireless speeds.
Pros
- Supports DDR5 memory for high bandwidth
- Includes Wi-Fi 7 for fast wireless
- Features PCIe 5.0 for future-proofing
- ATX form factor for broad compatibility
Cons
- Ethernet speed is limited to 1GbE
- ATX size requires a larger case
Good fit if
- You want Wi-Fi 7 support
- You are building an Intel LGA 1700 system
- You need PCIe 5.0 connectivity
Skip if
- You need faster than 1GbE wired speeds
- You require a smaller microATX form factor
- You are using older DDR4 memory
Verdict: The ASUS Z790 Gaming WiFi7 ATX is a solid choice for gamers building on Intel LGA 1700 who prioritize Wi-Fi 7 and PCIe 5.0. It suits users who have the space for an ATX board and do not require 2.5GbE or higher wired speeds.
ASUS Prime A620-PLUS WIFI6 AM5 ATX
Best for: Budget AM5 builds with ATX cases
- CPU Socket
- AM5
- Chipset
- A620
- Form Factor
- ATX
- Memory Type
- DDR5
- Wi-Fi Standard
- Wi-Fi 6
- Dimensions
- 12 × 9.6 × 1.6 inches
View on Amazon: ASUS Prime A620-PLUS WIFI6 AM5 ATX Affiliate link
This ASUS motherboard uses the AM5 socket and supports DDR5 memory. It features Wi-Fi 6 for wireless connectivity and follows the ATX form factor. The board measures 12 by 9.6 inches and weighs 1.8 pounds. It suits users building a modern AMD Ryzen system who need standard connectivity and reliable performance within a budget.
Pros
- Supports DDR5 memory for high bandwidth
- Includes built-in Wi-Fi 6
- Uses the AM5 socket for latest Ryzen CPUs
- ATX form factor fits standard cases
Cons
- A620 chipset offers fewer expansion options than Z790 or B760 models
- Heavier at 1.8 pounds compared to Micro ATX alternatives
- Larger ATX size requires more case space than mATX boards
Good fit if
- You need a standard ATX board for a new AM5 build
- You want Wi-Fi 6 without extra cards
- You prioritize DDR5 support over legacy DDR4
Skip if
- You require PCIe 5.0 storage or GPU slots
- You prefer a compact Micro ATX design
- You are building with older AM4 processors
Verdict: ASUS Prime A620-PLUS WIFI6 AM5 ATX fits users building a modern AMD system who need standard ATX size and Wi-Fi 6. It delivers solid DDR5 performance for budget-conscious builders.
ASUS Prime Micro ATX AM4 Motherboard
Best for: compact AM4 builds needing 1GbE networking
- CPU Socket
- AM4
- Form Factor
- Micro ATX
- Memory Type
- DDR4
- PCIe Version
- PCIe 4.0
- M.2 Slots
- 2
- Ethernet Speed
- 1Gb LAN
View on Amazon: ASUS Prime Micro ATX AM4 Motherboard Affiliate link
This micro ATX motherboard runs on the AMD B550 chipset and supports AM4 processors. You get a PCIe 4.0 x16 slot for dedicated graphics, dual M.2 slots for NVMe storage, and built-in Wi-Fi 5 alongside standard 1Gb LAN networking. Display outputs include HDMI 2.1, DVI, and D-Sub. It suits your build if you want DDR4 memory support, wired Gigabit connectivity, and essential heatsink cooling in a compact desktop footprint.
Pros
- PCIe 4.0 x16 expansion slot
- Dual M.2 storage slots with PCIe 4.0 x4 support on the primary slot
- 1Gb LAN paired with onboard Wi-Fi 5
- Dedicated VRM and PCH heatsinks
Cons
- Wired networking limited to 1GbE speeds
- Uses Wi-Fi 5 rather than newer wireless standards
- Restricted to DDR4 memory
Good fit if
- You need an AM4 socket board with PCIe 4.0 storage and graphics support.
- You want built-in Wi-Fi 5 alongside a dedicated 1Gb LAN port.
- You plan to build a compact desktop using DDR4 memory.
Skip if
- You require 2.5GbE or faster wired networking.
- You plan to use newer AM5 or Intel processors.
- You need native Wi-Fi 6 connectivity.
Verdict: ASUS Prime Micro ATX AM4 Motherboard delivers reliable PCIe 4.0 performance, dual M.2 slots, and solid 1Gb LAN networking for compact desktop builds.
ASUS Prime A520M-K Micro-ATX Motherboard
Best for: compact AM4 builds with basic display needs
- CPU Socket
- AM4
- Form Factor
- MATX
- Memory Type
- DDR4
- Chipset
- AMD A520
- Dimensions
- 8.9 × 8.7 × 0.79 inches
- Weight
- 1.19 pounds
View on Amazon: ASUS Prime A520M-K Micro-ATX Motherboard Affiliate link
This ASUS Prime A520M-K motherboard uses the AMD AM4 socket and supports DDR4 memory. It features a Micro-ATX form factor, making it compact for smaller cases. The board includes D-SUB and HDMI video outputs for basic connectivity. It is designed for users building budget-friendly systems with 3rd Gen Ryzen processors who need essential functionality without extra features.
Pros
- Supports up to 64GB of DDR4 memory
- Micro-ATX form factor fits compact cases
- Includes HDMI and D-SUB video outputs
- Compatible with AMD AM4 socket CPUs
Cons
- Only two DIMM slots limit upgrade paths
- Micro-ATX size offers fewer expansion slots than ATX boards
- D-SUB port uses older analog video standards
Good fit if
- You are building a compact system with limited case space
- You need a budget-friendly board for AM4 processors
- You only require basic display outputs for office or media tasks
Skip if
- You need Wi-Fi or Bluetooth connectivity
- You plan to use DDR5 memory modules
- You require multiple high-speed PCIe expansion slots
Verdict: ASUS Prime A520M-K AM4 mATX is a straightforward entry-level board for users prioritizing cost over connectivity. It suits those building simple AM4 systems who do not need wireless options or advanced expansion.
ASUS TUF Gaming AM4 Wi-Fi Micro-ATX Motherboard
Best for: AM4 Ryzen gaming builds requiring Wi-Fi
- CPU Socket
- AM4
- Form Factor
- microATX
- Wi-Fi Standard
- 802.11ac
- Use Case
- Gaming
- Dimensions
- 2.75 × 10.8 × 11 inches
- Weight
- 1.27 pounds
View on Amazon: ASUS TUF Gaming AM4 Wi-Fi Micro-ATX Motherboard Affiliate link
The ASUS TUF Gaming MicroATX Wi-Fi Motherboard gives you an AM4 socket platform built for Ryzen 3000, 4000 G-Series, and 5000 Series processors. You get integrated 802.11ac Wi-Fi, a 32Gb/s M.2 slot, and dedicated VRM plus PCH heatsinks for thermal stability. Display outputs include DisplayPort, HDMI, and D-Sub. This microATX board suits you if you want compact desktop gaming hardware with onboard wireless networking and hardware BIOS FlashBack recovery.
Pros
- Built-in 802.11ac Wi-Fi connectivity
- Onboard BIOS FlashBack button for firmware updates
- Dedicated VRM and PCH heatsinks
- Triple video output via DisplayPort, HDMI, and D-Sub
- M.2 slot supporting up to 32Gb/s speeds
Cons
- Uses Wi-Fi 5 (802.11ac) rather than newer Wi-Fi standards
- Restricted to older AM4 socket processors
- No USB Type-C ports listed in the connectivity specs
Good fit if
- You use an AMD Ryzen 3000, 4000 G-Series, or 5000 Series CPU.
- You need built-in Wi-Fi without buying a separate expansion card.
- You want physical BIOS FlashBack support for quick BIOS maintenance.
Skip if
- You plan to run an AMD AM5 processor or an Intel processor.
- You require newer Wi-Fi 6 wireless connectivity.
- You need USB Type-C connectivity.
Verdict: ASUS TUF Gaming MicroATX Wi-Fi Motherboard delivers core gaming connectivity with AM4 processor support, built-in wireless networking, and reliable VRM cooling. It serves as a dependable microATX foundation for budget-focused Ryzen builds.
ASUS Prime A520M-K Micro ATX Motherboard
Best for: basic compact AMD desktop builds
- Chipset
- AMD A520
- Form Factor
- Micro ATX
- Dimensions
- 8.7 × 8.9 × 8.7 inches
- Weight
- 1.76 pounds
View on Amazon: ASUS Prime A520M-K Micro ATX Motherboard Affiliate link
The ASUS Prime A520M-K Micro ATX is a compact AMD motherboard built around the AMD A520 chipset. Its Micro ATX form factor measures 8.7 by 8.9 inches and weighs 1.76 pounds, making it suitable for smaller desktop cases. If you need a straightforward AMD platform for essential everyday computing without the footprint of a full ATX board, this model provides the core layout you need.
Pros
- Built on the AMD A520 chipset
- Compact Micro ATX form factor
- Lightweight board design at 1.76 pounds
Cons
- Entry-level AMD A520 chipset
- No integrated Wi-Fi listed in specifications
Good fit if
- You want an AMD A520 chipset board for an essential desktop build.
- You need a Micro ATX form factor to fit inside a smaller computer case.
Skip if
- You need a larger standard ATX motherboard for more expansion space.
- You require onboard Wi-Fi connectivity listed in the specifications.
Verdict: ASUS Prime A520M-K Micro ATX delivers standard AMD A520 chipset functionality in a space-saving Micro ATX footprint. It serves as a straightforward option if you are assembling a compact AMD desktop setup.
ASUS Micro-ATX Intel DDR4 Wi-Fi Motherboard
Best for: Intel LGA 1700 builds needing PCIe 5.0
- CPU Socket
- LGA 1700
- Chipset
- Intel B760
- Form Factor
- Micro-ATX
- Memory Type
- DDR4
- PCIe Version
- PCIe 5.0
- M.2 Slots
- 2
View on Amazon: ASUS Micro-ATX Intel DDR4 Wi-Fi Motherboard Affiliate link
This micro-ATX board features an Intel LGA 1700 socket compatible with 12th, 13th, and 14th Gen Core CPUs. It pairs a high-speed PCIe 5.0 slot with DDR4 memory support, dual M.2 slots, and integrated Wi-Fi 6. You also get a 2.5Gb Ethernet port and VRM heatsinks. It suits you if you want PCIe 5.0 bandwidth and fast networking while keeping DDR4 RAM.
Pros
- PCIe 5.0 x16 expansion support
- Integrated Wi-Fi 6 and 2.5Gb Ethernet
- Two onboard M.2 storage slots
- VRM and PCH heatsinks included
Cons
- Limited to DDR4 memory rather than DDR5
- Rear panel lists only USB Type-A ports
Good fit if
- You want PCIe 5.0 expansion on an Intel LGA 1700 platform.
- You plan to reuse or buy standard DDR4 memory.
- You need built-in Wi-Fi 6 and 2.5Gb Ethernet connectivity.
Skip if
- You plan to build with an AMD Ryzen processor.
- You require newer DDR5 system memory.
- You need more than two M.2 storage drives.
Verdict: ASUS Intel B760 Micro-ATX Motherboard provides PCIe 5.0 support, Wi-Fi 6, and 2.5Gb networking on an LGA 1700 base. It is a practical option if you want modern GPU connectivity with DDR4 memory.
Specifications side by side
| Spec | ASUS Z790 Gaming Wi-Fi 7 ATX | ASUS Prime A620-PLUS WIFI6 AM5 ATX | ASUS Prime Micro ATX AM4 Motherboard | ASUS Prime A520M-K Micro-ATX Motherboard | ASUS TUF Gaming AM4 Wi-Fi Micro-ATX Motherboard | ASUS Prime A520M-K Micro ATX Motherboard | ASUS Micro-ATX Intel DDR4 Wi-Fi Motherboard |
|---|---|---|---|---|---|---|---|
| CPU Socket | LGA 1700 | AM5 | AM4 | AM4 | AM4 | not stated | LGA 1700 |
| Chipset | Z790 | A620 | not stated | not stated | not stated | AMD A520 | Intel B760 |
| Form Factor | ATX | ATX | Micro ATX | MATX | microATX | Micro ATX | Micro-ATX |
| Memory Type | DDR5 | DDR5 | DDR4 | DDR4 | not stated | not stated | DDR4 |
| PCIe Version | PCIe 5.0 | not stated | PCIe 4.0 | not stated | not stated | not stated | PCIe 5.0 |
| M.2 Slots | 3 | not stated | 2 | not stated | not stated | not stated | 2 |
| Wi-Fi Standard | Wi-Fi 7 | Wi-Fi 6 | not stated | not stated | 802.11ac | not stated | Wi-Fi 6 |
| Ethernet Speed | 1 GbE | not stated | 1Gb LAN | not stated | not stated | not stated | 2.5Gb Ethernet |
| Power Phases | 14+1 | not stated | not stated | not stated | not stated | not stated | not stated |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 6 | Wi-Fi 5 | not stated | Wi-Fi 5 | not stated | Wi-Fi 6 |
| Use Case | Gaming | not stated | not stated | not stated | Gaming | not stated | not stated |
| Dimensions | 13.3 × 9.21 × 1.57 inches | 12 × 9.6 × 1.6 inches | 10 × 2.6 × 10 inches | 8.9 × 8.7 × 0.79 inches | 2.75 × 10.8 × 11 inches | 8.7 × 8.9 × 8.7 inches | 9.6 × 8.3 × 1.4 inches |
| Weight | 2.15 pounds | 1.8 pounds | 1.27 pounds | 1.19 pounds | 1.27 pounds | 1.76 pounds | 1.5 pounds |
| Model | Z790 GAMING WIFI7 | not stated | B550M-A AC | 90MB1500-M0EAY0 | TUF GAMING A520M-PLUS WIFI | 90MB1500-M0EAY0 | B760M-AYW WIFI D4 II |
| Size | not stated | PRIME A620-PLUS WIFI6 | Micro ATX | Prime | TUF GAMING A520M-PLUS WIFI | not stated | Micro-ATX|MAX B760M-AYW|M.2x2|WiFi6 |
| Color | not stated | BLACK | not stated | Black | not stated | not stated | BLACK |
If you need moisture control for your setup, our companion guide ranks the best dehumidifiers under 100 by operating specifications.
How to choose the right motherboard
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Match form factor to case
Verify your PC case supports the motherboard size before buying. ATX boards like the TUF Gaming AM5 measure 13.3 by 10.8 inches. Micro-ATX options are smaller, typically around 10 by 10 inches. The Prime A520M-K is even more compact at 8.7 by 8.7 inches. Check your case specifications to ensure the board fits. Mismatched sizes prevent installation. Choose ATX for maximum expansion slots. Select Micro-ATX for smaller builds. This simple check saves time and returns.
-
Select memory type carefully
DDR4 and DDR5 are not interchangeable. You must choose the memory type that matches your motherboard. The ASUS TUF Gaming AM5 requires DDR5 modules. The Prime B550M-A AC uses DDR4. The Pro Commercial board supports DDR5 for newer Intel systems. Buying the wrong RAM wastes money. Check the memory type in the product attributes. Ensure your existing or planned RAM sticks match this specification exactly. This decision locks in your platform generation.
-
Check Wi-Fi standards
Wireless capability varies across these models. Some boards include Wi-Fi 6, while others offer Wi-Fi 5. The ASUS TUF Gaming AM5 features Wi-Fi 6 for faster speeds. The Prime B550M-A AC uses the older Wi-Fi 5 standard. If you need modern wireless performance, look for Wi-Fi 6 in the attributes. Boards without Wi-Fi require an Ethernet cable or a separate adapter. Verify this spec if you plan to use wireless networking. This affects your connectivity options significantly.
-
Evaluate Ethernet speed needs
Wired network speed matters for large transfers. Most boards offer 1GbE connectivity. The ASUS Prime Micro ATX AM4 Motherboard provides 1Gb LAN. Some newer models, like the TUF Gaming AM5, include 2.5 Gb wired networking. If you have a fast internet plan or local network, 2.5 Gb is better. Check the Ethernet speed in the specs. Standard 1GbE is sufficient for most users. Choose the higher speed if you transfer large files frequently. This impacts your data throughput.
-
Consider PCIe version for storage
PCIe version affects storage and GPU speed. PCIe 5.0 is the latest standard. The ASUS TUF Gaming AM5 supports PCIe 5.0 for future devices. The Prime Micro ATX AM4 Motherboard uses PCIe 4.0. Older boards may use PCIe 3.0. If you buy a PCIe 5.0 SSD, it works on PCIe 4.0 boards but at lower speeds. Check the PCIe version in the attributes. Match your storage devices to the available bandwidth. This ensures you get the best performance from your components.
Frequently asked questions
Which ASUS motherboard supports the latest Wi-Fi standard under $100?
The ASUS Z790 Gaming Wi-Fi 7 ATX offers Wi-Fi 7. It is designed for Intel LGA 1700 gaming builds. This board also includes PCIe 5.0 support. It suits users who have space for an ATX case. It provides 1GbE wired networking for your setup.
What is the best budget AM5 motherboard on this list?
The ASUS Prime A620-PLUS WIFI6 AM5 ATX is the best budget option. It supports AM5 sockets and DDR5 memory. It includes Wi-Fi 6 for wireless connectivity. The board measures 12 by 9.6 inches. It fits standard ATX cases for modern AMD systems.
Can I get Wi-Fi on a compact AM4 motherboard?
Yes, the ASUS TUF Gaming AM4 Wi-Fi Micro-ATX Motherboard includes Wi-Fi 5. It supports AM4 processors in a compact form factor. The board measures 11 by 10.8 inches. It is suitable for Ryzen gaming builds that need wireless networking without taking up much space.
Does any board support PCIe 5.0 with DDR4 memory?
The ASUS Micro-ATX Intel DDR4 Wi-Fi Motherboard supports both PCIe 5.0 and DDR4. It uses the LGA 1700 socket. It includes Wi-Fi 6 and 2.5GbE networking. The board measures 9.6 by 8.3 inches. It is a practical choice for modern GPU connectivity with older memory types.
Which motherboard is best for very compact AM4 builds?
The ASUS Prime A520M-K Micro-ATX Motherboard is ideal for compact setups. It features the AMD A520 chipset and AM4 socket. It uses DDR4 memory. The board measures 8.9 by 8.7 inches. It is a straightforward option for users who do not need advanced expansion or wireless options.
What is the largest form factor available in this guide?
The largest form factor is ATX. Both the ASUS Z790 Gaming Wi-Fi 7 ATX and the ASUS Prime A620-PLUS WIFI6 AM5 ATX use this size. The Z790 measures 13.3 by 9.21 inches. The A620 measures 12 by 9.6 inches. These boards require cases that support standard ATX dimensions.
Does the Prime Micro ATX AM4 Motherboard have Wi-Fi?
Yes, the ASUS Prime Micro ATX AM4 Motherboard includes Wi-Fi 5. It supports PCIe 4.0 and DDR4 memory. It features dual M.2 slots and 1Gb LAN networking. The board is designed for compact desktop builds that need reliable wired and wireless connectivity.