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Product comparison · 2 motherboards

ASUS PRIME B840M-K vs ASUS ROG CROSSHAIR X870E DARK HERO

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  • 61specifications compared
  • 25differ
  • 36identical
  • 32known for one product only

Key differences

  • Number of memory slots
    • 2
    • 4
  • Maximum internal memory
    • 128 GB
    • 256 GB
  • Number of storage drives supported
    • 6
    • 9
  • USB 2.0 connectors
    • 2
    • 3
  • Number of chassis fan connectors
    • 3
    • 4
  • USB 2.0 ports quantity
    • 2
    • 0
  • USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
    • 4
    • 0
  • USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity
    • 0
    • 6

Side by side

Differences highlightedShow differences only
93 specifications
A

ASUS

PRIME B840M-KView product
B

ASUS

ROG CROSSHAIR X870E DARK HEROView product
Processoridentical
Processor manufacturerAMDAMD
Processor socketSocket AM5Socket AM5
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 SeriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor socketsSocket AM5Socket AM5
Memory2 differ
Supported memory typesDDR5-SDRAMDDR5-SDRAM
Number of memory slotsDiffers24
Memory slots typeDIMMDIMM
Memory channelsDual-channelDual-channel
ECC сompatibilityECC & Non-ECCECC & Non-ECC
Maximum internal memoryDiffers128 GB256 GB
Unbuffered memoryYesYes
Storage controllers1 differ
Supported storage drive typesHDD & SSDHDD & SSD
Supported storage drive interfacesM.2, SATA IIIM.2, SATA III
Number of HDDs supported44
Number of storage drives supportedDiffers69
RAID supportYesYes
RAID levels0, 1, 5, 100, 1, 5, 10
Graphicsidentical
Parallel processing technology supportNot supportedNot supported
On-board graphics cardKnown for oneNo
Internal I/O2 differ
USB 2.0 connectorsDiffers23
USB 3.2 Gen 1 (3.1 Gen 1) connectors22
USB 3.2 Gen 2 (3.1 Gen 2) connectors00
USB 3.2 Gen 2x2 connectorsKnown for one2
Number of SATA III connectors44
Number of SATA II connectorsKnown for one0
Number of SATA connectorsKnown for one0
Front panel audio connectorYesYes
Front panel connectorYesYes
ATX Power connector (24-pin)YesYes
CPU fan connectorYesYes
Number of chassis fan connectorsDiffers34
EPS power connector (8-pin)YesYes
12V power connectorYesYes
Number of temperature sensor headersKnown for one1
S/PDIF out connectorKnown for oneYes
Number of COM connectorsKnown for one1
TPM connectorKnown for oneYes
RGB LED pin headerKnown for oneYes
Number of RGB LED pin headersKnown for one3
Rear panel I/O ports5 differ
USB 2.0 ports quantityDiffers20
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers40
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity00
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantityDiffers06
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantityDiffers03
USB4 Gen 3x2 ports quantityKnown for one2
Ethernet LAN (RJ-45) portsDiffers12
VGA (D-Sub) ports quantity00
HDMI ports quantity11
DVI-D ports quantity00
Microphone inKnown for oneYes
S/PDIF out portKnown for oneYes
WiFi-AP antenna jackKnown for one1
Network3 differ
Ethernet LANYesYes
Ethernet interface typeDiffers2.5 Gigabit Ethernet5 Gigabit Ethernet, 10 Gigabit Ethernet
Wi-FiDiffersNoYes
Top Wi-Fi standardDiffersNot availableWi-Fi 7 (802.11be)
Wi-Fi standardsKnown for oneWi-Fi 7 (802.11be)
WLAN controller modelKnown for oneMediaTek MT7927
BluetoothKnown for oneYes
Bluetooth versionKnown for one5.4
Features3 differ
Component forPCPC
Motherboard form factorDiffersmicro ATXATX
Motherboard chipset familyAMDAMD
Motherboard chipsetDiffersAMD B840AMD X870E
Audio chipKnown for oneRealtek ALC4082
Audio output channels7.1 channels7.1 channels
Product colourBlackBlack
Windows operating systems supportedDiffersWindows 10 x64, Windows 11Windows 11
Expansion slots2 differ
PCI Express x16 (Gen 4.x) slotsDiffers12
PCI Express x16 (Gen 5.x) slotsKnown for one2
Number of M.2 (M) slotsDiffers25
1st M.2 largest key sizeKnown for one22110
1st M.2 highest PCI Express generationKnown for one5.0
2nd M.2 largest key sizeKnown for one2280
2nd M.2 highest PCI Express generationKnown for one5.0
3rd M.2 largest key sizeKnown for one2280
3rd M.2 highest PCI Express generationKnown for one4.0
4th M.2 largest key sizeKnown for one2280
4th M.2 highest PCI Express generationKnown for one4.0
5th M.2 highest PCI Express generationKnown for one4.0
PCI Express x16 (Gen 3.x) slotsKnown for one1
BIOS1 differ
BIOS typeUEFI AMIUEFI AMI
BIOS memory sizeDiffers256 Mbit512 Mbit
Packaging data4 differ
Package widthDiffers270 mm308 mm
Package depthDiffers263 mm367 mm
Package heightDiffers51.5 mm110 mm
Package weightDiffers1.02 kg4.43 kg
Weight & dimensions2 differ
WidthDiffers244 mm305 mm
DepthDiffers221 mm244 mm
Packaging contentidentical
Antenna includedKnown for oneYes
Cables includedSATASATA
Screws includedYesYes
Other featuresidentical
mSATA ports quantityKnown for one0

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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