Motherboards under $100

AM4, mATX, DDR4, 4 Memory slots

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GIGABYTE B550M K AMD AM4 Micro-ATX Motherboard, Supports Ryzen 5000/4000/3000 Series Processors, DDR4, 3+3 Power Phase,

$74.99as of 11/04/2026 15:07 PST - Details

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Spec score8.6

Pros

+Micro-ATX size is compact for smaller cases

+Four RAM slots supporting DDR4 memory

+Two M.2 slots for fast storage

Cons

−No built-in Wi-Fi

Compared with the 8 motherboards on this page

+2 m.2 slots: the most m.2 slots of the 20 here

+4 memory slots: only 1 of 22 here have more memory slots

+1G: only 4 of 30 here have a higher wired lan

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AM5, mATX, DDR5, 4 Memory slots

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ASRock A620M Pro RS Socket AM5 Micro-ATX Motherboard, Supports AMD Ryzen 9000/8000/7000 Series, DDR5 7200+ (OC), 6+2+1

$89.99as of 11/04/2026 12:09 PST - Details

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Spec score8.6

Pros

+Four RAM slots allow more memory than two-slot boards

+AM5 socket supports Ryzen 9000, 8000 and 7000 processors

+Two M.2 slots for solid-state storage

+Micro-ATX form factor is compact for mid-size builds

Cons

−Built on the AMD A620 chipset

Compared with the 8 motherboards on this page

+2 m.2 slots: the most m.2 slots of the 20 here

+4 memory slots: only 1 of 22 here have more memory slots

+1G: only 4 of 30 here have a higher wired lan

How pros and cons are picked (About: Disclaimer)

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LGA1700, mATX, DDR4, 4 Memory slots

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ASRock B760M Pro-A D4 Micro ATX Motherboard, Intel 14th/13th/12th Gen, 7+1+1 Dr.MOS, DDR4 5333+ (OC), PCIe 4.0, 2.5G

$86.49as of 11/04/2026 12:09 PST - Details

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Spec score9.0

Pros

+Two M.2 slots for fast storage expansion

+Four RAM slots for up to four memory modules

+Four SATA ports for additional drives

+Two PCIe x16 slots for graphics and expansion cards

+2.5G LAN port for faster wired networking

Compared with the 8 motherboards on this page

+2.5G: the highest wired lan of the 30 here

+2 m.2 slots: the most m.2 slots of the 20 here

+2 pcie x16 slots: the most pcie x16 slots of the 20 here

+4 memory slots: only 1 of 22 here have more memory slots

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LGA1200, mATX, DDR4, 4 Memory slots

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ASRock B560M-C Micro-ATX Motherboard, Supports 10th & 11th Gen Intel Core Processors (LGA1200), DDR4 4800MHz (OC), PCIe

$95.99as of 11/04/2026 12:09 PST - Details

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Spec score8.8

Pros

+Micro-ATX form factor fits compact builds

+Supports 10th and 11th Gen Intel Core processors on LGA1200

+Four RAM slots allow larger memory configurations

+Two M.2 slots for fast storage

+Eight SATA ports for many drives

Cons

−Supports only 10th and 11th Gen Intel processors

Compared with the 8 motherboards on this page

+2 m.2 slots: the most m.2 slots of the 20 here

+8 sata ports: the most sata ports of the 14 here

+4 memory slots: only 1 of 22 here have more memory slots

+1G: only 4 of 30 here have a higher wired lan

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LGA2011-3, mATX, 4 Memory slots, Intel X99

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SENECESLI X99 Motherboard, LGA 2011-3 Micro ATX DDR3 Motherboard for E5 V3 V4 CPU with 4 DDR3 Slots 128GB, M.2 NVMe

$54.58as of 11/04/2026 07:07 PST - Details

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Pros

+Micro ATX form factor for compact builds

+Four RAM slots for expansion

+Includes an M.2 NVMe interface

Cons

−Uses DDR3 memory

Compared with the 8 motherboards on this page

+4 memory slots: only 1 of 22 here have more memory slots

How pros and cons are picked (About: Disclaimer)

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4 Memory slots, 1 PCIe x16 slots, 1 M.2 slots, 4 SATA ports

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OLurkthu Motherboard with 6 USB2.0 Ports and 4 SATA2 Ports

$42.85as of 11/04/2026 00:31 PST - Details

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Spec score8.2

Pros

+Six USB 2.0 ports

+Four SATA ports for storage drives

+Four RAM slots

+Gigabit Ethernet networking

+One M.2 slot and one PCIe x16 slot

Compared with the 8 motherboards on this page

+4 memory slots: only 1 of 22 here have more memory slots

+1 pcie x16 slots: only 2 of 20 here have more pcie x16 slots

+1G: only 4 of 30 here have a higher wired lan

+4 sata ports: only 2 of 14 here have more sata ports

−1 m.2 slots: 11 of the 20 here have more m.2 slots

How pros and cons are picked (About: Disclaimer)

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LGA2011-3, mATX, DDR4, 4 Memory slots

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SHANGZHAOYUAN X99 LGA 2011-3 Motherboard for Intel Xeon E5 V3/V4 and Core i7 Series Processors (Micro ATX, DDR4 Max

$55.99as of 11/04/2026 07:07 PST - Details

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Spec score8.2

Compared with the 8 motherboards on this pagePros

+4 memory slots: only 1 of 22 here have more memory slots

+128GB maximum memory: only 1 of 17 here have a higher maximum memory

+1G: only 4 of 30 here have a higher wired lan

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AM4, mATX, DDR4, 4 Memory slots

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MSI PRO B550M-P Motherboard, mATX - Supports AMD Ryzen 5000/5000 G-Series, 4000 G-Series, 3000 G-Series Desktop

$89.99as of 11/04/2026 00:18 PST - Details

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Spec score8.2

Pros

+Compact mATX form factor

+Four RAM slots for DDR4 memory

+AM4 socket supports AMD Ryzen 5000 and older series processors

Cons

−Only 1G LAN for wired networking

−Uses DDR4 memory rather than newer DDR5

−Single M.2 slot limits fast storage expansion

Compared with the 8 motherboards on this page

+4 memory slots: only 1 of 22 here have more memory slots

+1 pcie x16 slots: only 2 of 20 here have more pcie x16 slots

+1G: only 4 of 30 here have a higher wired lan

−1 m.2 slots: 11 of the 20 here have more m.2 slots

How pros and cons are picked (About: Disclaimer)

About this product