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MSI

MSI MEG X870E ACE MAX AMD motherboard & Ryzen 9 9950X3D CPU combo

SKU CH-PJHE-EKGHX

Combines an X870E ATX board with a 16‑core Ryzen 9 9950X3D, 110A VRM, 64MB BIOS, 5G plus 10G LAN and five M.2 slots

  • CPU Socket TypeAM5
  • ChipsetAMD X870E
  • South BridgeAMD X870E
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • Unlock maximum CPU performance with the OC Engine clock generator
  • 64 MB BIOS ROM enables future CPU upgrades with better compatibility
  • 18+2+1 DRPS power stages rated at 110 A deliver stable overclocking headroom
  • Frozr cooling design with wavy fins, direct-touch heat pipes and double-sided M.2 shields keeps temperatures low
  • Dual 10G and 5G LAN ports provide high-throughput wired networking for gaming and work

Socket AM5 combo

The bundle pairs the MEG X870E ACE MAX motherboard with an AMD Ryzen 9 9950X3D processor. It targets enthusiasts who want a ready-to-run platform for heavy multitasking and high-frame-rate gaming. The board supports Ryzen 9000, 8000 and 7000 series CPUs out of the box.

DDR5 ceiling and lane budget

Four DDR5 slots accept up to 256 GB in dual-channel mode at speeds beyond 9000 MT/s when overclocked. Two PCIe 5.0 x16 slots and two PCIe 4.0 x16 slots share bandwidth with five M.2 sockets that run at PCIe 5.0 x4 or 4.0 x4. Four SATA 6 Gb/s ports add legacy storage headroom.

VRM thermal stack and I/O spread

An 18+2+1 phase DRPS design rated at 110 A per stage feeds the 170 W Zen 5 chip, cooled by wavy fin heatsinks, a cross heat-pipe and a metal backplate. Dual-sided M.2 shields keep drive temps in check. Networking uses 10 GbE and 5 GbE ports, while audio runs through a Realtek ALC4082 codec.

Highlights

  • Unlock maximum CPU performance with the OC Engine clock generator
  • 64 MB BIOS ROM enables future CPU upgrades with better compatibility
  • 18+2+1 DRPS power stages rated at 110 A deliver stable overclocking headroom
  • Frozr cooling design with wavy fins, direct-touch heat pipes and double-sided M.2 shields keeps temperatures low
  • Dual 10G and 5G LAN ports provide high-throughput wired networking for gaming and work

Specifications

BrandMSI
SeriesMEG
ModelMEG X870E ACE MAX+R9 9950X3D
CPU Socket TypeAM5
ChipsetAMD X870E
South BridgeAMD X870E
Number of Memory Slots4x288pin (DDR5)
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedNon-ECC
Buffer SupportedUn-buffered
PCI Express 5.0 x162 x PCI Express 5.0 x16
PCI Express 4.0 x162 x PCI Express 4.0 x16
PCI Express x162 x PCI Express x16
PCI Express x41 x PCI Express x4
Other Slots1 x M.2 (Key-E)
Serial ATA (SATA)4 x SATA 6Gb/s
M.25 x M.2 (Support PCIe 5.0 x4 & PCIe 4.0 x4)
SATA RAID0/1/10
Audio ChipsetRealtek ALC4082
Audio Channels7.1 Channels
LAN ChipsetMarvell AQC113CS, Realtek 8126
Second LAN ChipsetRealtek 8126
Max LAN Speed10Gbps + 5Gbps
Wireless LANWiFi IEEE 802.11 a / b / g / n / ac / ax / be
BluetoothYes
Back I/O Ports9 x USB 10Gbps Type-A, 2 x USB 10Gbps Type-C, 2 x USB 40Gbps Type-C, 1 x HDMI, 1 x 10G LAN, 1 x 5G LAN, 1 x Optical S/PDIF-Out
Video PortsHDMI + 2 x Display Port
S-VideoNo
HDMI1 x HDMI
RJ452 x RJ45
DisplayPort2 x DisplayPort
USB 3.111 x USB 3.1
USB 3.04 x USB 3.0
USB 1.1/2.04 x USB 2.0
USB Type-C2 x USB Type-C® port, with USB 40Gbps support; 2 x USB Type-C® port, with USB 10Gbps support; 1 x USB Type-C® port, with USB 20Gbps support
S/PDIF Out1 x Optical
Audio Ports5 Ports
Onboard USB4 x USB 3.2 + 4 x USB 2.0 + 1 x USB Type-C header, with USB 3.2 Gen 2x2
Form FactorATX
LED LightingRGB
Dimensions (W x L)243.84mm x 304.8mm
Power Pin24 Pin
Windows 11Supported

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Should I pick the 128MB L3 cache version or is there a smaller cache option?

The combo includes the Ryzen 9 9950X3D with 128MB L3 cache and 16MB L2 cache; no alternative cache sizes are offered for this CPU.

What does the 110A SPS power rating mean for daily use?

The 18+2+1 DRPS design delivers up to 110A per stage, giving the 170W processor stable current headroom for heavy workloads and overclocking.

How fast can the PCIe 5.0 x16 slots actually run a graphics card?

Two PCIe 5.0 x16 slots provide full 5.0 bandwidth to the GPU, while two additional slots operate at PCIe 4.0 x16 for secondary cards.

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