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Motherboards under $100

All motherboards

13 motherboards under $100 from ASRock, MSI, Shangzhaoyuan and more. Most cost $70 to $99, and half cost less than $90.

All filtersFilters (1)×
Socket: AM4  ×Clear all
BrandASRock3ASUS3GIGABYTE3MSI3
SocketLGA115514AM413LGA11509LGA17008LGA2011-36AM55LGA11514LGA12003LGA20113LGA18511
Form factormATX10ATX1
Memory typeDDR412
Memory slots2342
Maximum memory128GB1
PCIe x16 slots13
M.2 slots1423
SATA ports42
Wired LAN1G6
ECC memory supportECC memory support1
ChipsetAMD B5508AMD A5204AMD A3201
PriceUnder $754Under $15013$25 & above13$50 & above13$75 & above9
Clear allShow 13 motherboards
Socket: AM4  ×13 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
GIGABYTESpec score 8.6

AM4, mATX, DDR4, 4 Memory slots

+Micro-ATX size is compact for smaller cases
+Four RAM slots supporting DDR4 memory
+Two M.2 slots for fast storage
−No built-in Wi-Fi
$74.99-25%List: $99.99
as of 11/03/2026 23:11 PST - Details
ASUSSpec score 8.8

AM4, mATX, DDR4, 1 PCIe x16 slots

+Compact microATX form factor
+DDR4 memory with ECC support
+PCIe 4.0 support
−Single PCIe x16 slot limits graphics card expansion
$99.00-17%List: $119.99
as of 11/04/2026 12:09 PST - Details
ASRockSpec score 8.0

AM4, mATX, DDR4, 2 Memory slots

+Micro-ATX form factor fits compact builds
+Supports AMD Ryzen 3000, 4000 and 5000 processors
+Supports DDR4 memory with overclocking up to 4733 MHz
−Only two RAM slots limit total memory capacity
$69.99
as of 11/04/2026 12:09 PST - Details
ASUS

AM4, mATX, AMD A520

+Built-in 802.11ac Wi-Fi for wireless networking
+Compact microATX form factor
+AM4 socket supports 3rd Gen Ryzen processors
−A520 chipset has fewer features than B-series boards
$99.99
as of 11/04/2026 12:10 PST - Details
MSI

AM4, mATX, DDR4, AMD A520

+AM4 socket supports Ryzen 5000 series processors
+Compact micro-ATX form factor
+Includes M.2 slot for NVMe storage
−Uses older DDR4 memory rather than DDR5
−Only the basic A520 chipset, with limited overclocking support
$69.88
as of 11/04/2026 00:18 PST - Details
MSI

AM4, mATX, DDR4, 128GB

+Supports up to 128GB of memory
+PCIe 4.0 support for newer graphics cards and storage
+Micro-ATX form factor fits smaller builds
−Uses older DDR4 memory rather than DDR5
$89.99
as of 11/04/2026 00:18 PST - Details
ASRock

AM4, DDR4, AMD B550

+Supports 3rd Gen AMD Ryzen and future AMD Ryzen processors
+Uses AM4 socket for a wide range of Ryzen chips
+AMD B550 chipset for AM4 platform builds
$89.99
as of 11/04/2026 12:09 PST - Details
ASUSSpec score 8.9

AM4, mATX, DDR4, 2 M.2 slots

+2 m.2 slots: the most m.2 slots of the 20 here
+1G: only 4 of 30 here have a higher wired lan
$93.98
as of 11/04/2026 12:09 PST - Details
ASRockSpec score 8.3

AM4, ATX, DDR4, 1 PCIe x16 slots

+Standard ATX form factor offers room for expansion cards
+Four SATA ports for connecting multiple drives
+Built on the AMD B550 chipset
−Only one M.2 slot for solid-state storage
−Only one PCIe x16 slot limits expansion options
$89.99
as of 11/04/2026 12:09 PST - Details
Generic

AM4, DDR4, AMD A320

+AMD A320 chipset with AM4 socket for Ryzen processors
+Supports DDR4 memory at 3200+ MHz with overclocking
+NVMe M.2 interface for fast solid-state storage
−A320 chipset offers fewer overclocking and expansion options
$99.34
as of 11/03/2026 23:07 PST - Details
MSISpec score 8.2

AM4, mATX, DDR4, 4 Memory slots

+Compact mATX form factor
+Four RAM slots for DDR4 memory
+AM4 socket supports AMD Ryzen 5000 and older series processors
−Only 1G LAN for wired networking
−Uses DDR4 memory rather than newer DDR5
$89.99
as of 11/04/2026 00:18 PST - Details
GIGABYTESpec score 8.0

AM4, mATX, DDR4, 2 Memory slots

+Uses AM4 socket for AMD Ryzen processors
+Includes NVMe PCIe 3.0 x4 M.2 slot
+Includes Gigabit LAN
−Only two RAM slots limit total memory expansion
$79.99
as of 11/03/2026 23:11 PST - Details
GIGABYTE

AM4, mATX, DDR4, 2 Memory slots

+Uses AM4 socket for AMD Ryzen processors
+Supports DDR4 memory
+Includes HDMI and D-Sub video outputs
−Only two RAM slots limit total memory expansion
−Lacks M.2 slot listed on the product
$67.00
as of 11/03/2026 23:11 PST - Details

Compare specs

motherboardSocketForm factorChipsetSpec scorePrice
AM4mATXAMD B5508.6$74.99
as of 11/03/2026 23:11 PST - Details
AM4mATXAMD B5508.8$99.00
as of 11/04/2026 12:09 PST - Details
AM4mATXAMD B5508.0$69.99
as of 11/04/2026 12:09 PST - Details
AM4mATXAMD A520n/a$99.99
as of 11/04/2026 12:10 PST - Details
AM4mATXAMD A520n/a$69.88
as of 11/04/2026 00:18 PST - Details
AM4mATXAMD B550n/a$89.99
as of 11/04/2026 00:18 PST - Details
AM4AMD B550n/a$89.99
as of 11/04/2026 12:09 PST - Details
AM4mATXAMD B5508.9$93.98
as of 11/04/2026 12:09 PST - Details
AM4ATXAMD B5508.3$89.99
as of 11/04/2026 12:09 PST - Details
AM4AMD A320n/a$99.34
as of 11/03/2026 23:07 PST - Details

Before you buy

Other price ranges

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Popular filters

DDR4 Motherboards199DDR5 Motherboards190ATX Motherboards165mATX Motherboards152Motherboards under $200112Motherboards under $150109AM5 Motherboards99Motherboards with 4 Memory Slots96

Motherboards by use

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