ASUS Prime B840M-A-CSM Motherboard Socket AMD AM5 (AMD B840, mATX, DDR5 Memory

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💡 How to pick a motherboard
What to look for:
  • Socket matches your CPU (AM5, LGA1851, etc.)
  • Form factor fits your case (ATX, mATX, ITX)
  • RAM type (DDR4 or DDR5) and slot count
💰 Budget: $100-$150. Mid-range: $180-$280. High-end: $300+ with WiFi, PCIe 5.0
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ProductSocketForm FactorChipsetWiFiValuePrice
Prime B840M-A-CSM Motherboard Socket AMD AM5 (AMD B840, mATX, DDR5 Memory Motherboard
Prime B840M-A-CSM Motherboard Socket AMD AM5 (AMD B840, mATX, DDR5 Memory
ASUS★★★★4.3Sold by Yachew LTD UK via Amazon
AM5
mATX
B840
None
C
$261.26
Specifications
SocketAM5
Form FactormATX
MemoryDDR5
RAM Slots4
Max RAM192
WiFiNone
Weight910 Grams
Model #PRIME B840M-A-CSM
PERFORMANCE
64%
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Amazon
✓ In Stock
Sold by Yachew LTD UK via Amazon
$261.26
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VALUE SCORE
C
9.8
Average value
Performance (64%) ÷ Price ($261.26) = 9.8
S ≥28 · A ≥20 · B ≥14 · C ≥8 · D <8
FUTURE-PROOFING
✅AM5 — supported through 2027+
✅DDR5 memory
Prime B840M-A-CSM Motherboard Socket AMD AM5 (AMD B840, mATX, DDR5 Memory Motherboard
CONSIDER INSTEAD
SAVE $190.2699999999999894% of this product's perf
A520M S2H (AMD Ryzen AM4/MicroATX/4+3 Phases Digital PWM/Gigabyte Gaming GbE LAN/NVMe PCIe 3.0 x4 M.2/3 Display Interfaces/Q-Flash Plus/RGB Fusion 2.0/Motherboard)
Socket
AM4
Chipset
A520
Form
ATX
WiFi
None
$70.99
+10% FASTER$151.26999999999998 cheaper
ASUS - TUF GAMING B650-PLUS WIFI (Socket AM5) AMD B650 ATX DDR5 Wi-Fi 6 Motherboard - Black
Socket
AM5
Chipset
B650
Form
ATX
WiFi
WiFi 6
$109.99