MSI PRO B840M-B Motherboard, mATX - Supports AMD Ryzen 9000/8000 / 7000 Processors, AM5 - DDR5 Memory Boost (8000+ MT/s OC)

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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
PRO B840M-B Motherboard, mATX - Supports AMD Ryzen 9000/8000 / 7000 Processors, AM5 - DDR5 Memory Boost (8000+ MT/s OC) Motherboard
PRO B840M-B Motherboard, mATX - Supports AMD Ryzen 9000/8000 / 7000 Processors, AM5 - DDR5 Memory Boost (8000+ MT/s OC)
MSI★★★★4.1🔥 DEAL -$16Sold by Amazon Germany via Amazon
AM5
mATX
B840
None
B
$152.52
$136.36
Specifications
SocketAM5
Form FactormATX
MemoryDDR5
RAM Slots2
Max RAM256
WiFiNone
Weight2.2 lbs
Model #7E76-002R
PERFORMANCE
66%
Customer Reviews★★★★★5.0 · 5 reviews
★★★★★The MSI MPG X870E CARBON WIFI motherboard
The MSI MPG X870E CARBON WIFI motherboard has been one of the best parts of my build. Everything about it feels premium, from the design to the performance and overall stability. Setup was very easy, the BIOS is clean and simple to navigate, and it works perfectly with high-end AM5 processors and DDR5 memory. Gaming performance has been excellent, and the board handles multitasking, heavy workloads, and high-speed components without any problems. The Wi-Fi 7 support is a huge plus, connection speeds are fast and stable, and there are plenty of ports and expansion options for future upgrades. It also has great cooling across the board, which helps keep temperatures under control during long gaming sessions. The carbon-black design and RGB lighting give the whole PC a very clean and high-end look. Overall, it feels like a powerful, reliable motherboard built for serious gaming and next-generation performance.
EdansO · 2026-05-06 · via bestbuy
★★★★★Love the Look and MSI Center is very easy to use
TItle says it all. I really enjoy the features of MSI Center. I use it on my desktop and laptop. I love the look as well no issues
JUSTINO · 2026-04-20 · via bestbuy
★★★★★High end motherboard with great BIOS
I was looking for a top tier motherboard and the MSI Carbon checked every box. Super easy to build with, great features, and the BIOS is by far the cleanest and easiest I’ve used.
Bizj · 2026-04-09 · via bestbuy
★★★★★Great motherboard
Works really well and love to the signed on the motherboard
MichaelM · 2026-03-31 · via bestbuy
★★★★★Grwat mobo
Great motherboard. I am coming from an Asus x670e to MSI x870e. Great features.
Jbdred · 2026-02-20 · via bestbuy
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Amazon
✓ In Stock
Sold by Amazon Germany via Amazon
$136.36
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Newegg
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VALUE SCORE
B
19.4
Good value
Performance (66%) ÷ Price ($136.36) = 19.4
S ≥28 · A ≥20 · B ≥14 · C ≥8 · D <8
FUTURE-PROOFING
✅AM5 — supported through 2027+
✅DDR5 memory
💰
Below MSRP
Was $152.52 → $136.36
11% off
PRO B840M-B Motherboard, mATX - Supports AMD Ryzen 9000/8000 / 7000 Processors, AM5 - DDR5 Memory Boost (8000+ MT/s OC) Motherboard
CONSIDER INSTEAD
SAVE $59.37000000000002100% of this product's perf
B550 Eagle WIFI6 AMD AM4 ATX Motherboard, Supports Ryzen 5000/4000/3000 Processors, DDR4
Socket
AM4
Chipset
B550
Form
ATX
WiFi
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$76.99
+16% FASTER$23.37000000000002 cheaper
MAG B860 Tomahawk WiFi Motherboard, ATX - Supports Intel Core Ultra Processors (Series 2), LGA 1851 - DDR5 Memory Boo...
Socket
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Chipset
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Form
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WiFi
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$112.99