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★★★★4.3🔥 DEAL -$38
AM5
mATX
B840
None
C
$238.99
$200.83
2 stores
Specifications
asinB0DP5DJ846
reviews9
Model #PRIME B840M-A-CSM
Weight910 Grams
SocketAM5
MemoryDDR5
Max RAM192
RAM Slots4
Form FactormATX
WiFiNone
value26
PERFORMANCE
64%
Buy Now
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✓ In Stock
$200.83
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Amazon
✓ In Stock
$238.99
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Best Buy
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MSI
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Newegg (Open Box)
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VALUE SCORE
C
12.7
Average value
Performance (64%) ÷ Price ($200.83) = 12.7
S ≥28 · A ≥20 · B ≥14 · C ≥8 · D <8
FUTURE-PROOFING
✅AM5 — supported through 2027+
✅DDR5 memory
💰
Below MSRP
Was $238.99 → $200.83
Save $38.16 at newegg vs amazon
16% off
Prime B840M-A-CSM Motherboard Socket AMD AM5 (AMD B840, mATX, DDR5 Memory Motherboard
CONSIDER INSTEAD
SAVE $119.84000000000002128% of this product's perf
B850 Eagle WIFI6E AMD AM5 ATX Motherboard, Support AMD Ryzen 9000/8000/7000 Series, DDR5
Socket
AM5
Chipset
B850
Form
ATX
WiFi
WiFi 6E
$80.99
+18% FASTER$119.84000000000002 cheaper
B850 Eagle WIFI6E AMD AM5 ATX Motherboard, Support AMD Ryzen 9000/8000/7000 Series, DDR5
Socket
AM5
Chipset
B850
Form
ATX
WiFi
WiFi 6E
$80.99