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ATX motherboard with CPU installed, dark metallic finish, large VRM heatsinks and M.2 shields

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 socketAM5
  • ChipsetAMD X870E
  • Form factorATX
  • South bridgeAMD X870E
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB

CPU +Ryzen 9 9950X3D

  • 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.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $1,501.99
Pricier than about 93% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product lineMEG
Model nameMEG X870E ACE MAX+R9 9950 × 3D
Processor
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots5 x M.2 (Support PCIe 5.0 x4 & PCIe 4.0 x4)
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC4082
Sound channels7.1 Channels
Connectivity
Ethernet controllerMarvell AQC113CS, Realtek 8126
Second LAN controllerRealtek 8126
Maximum network speed10 Gbit/s + 5 Gbit/s
Wi-Fi standardWiFi IEEE 802.11 a / b / g / n / ac / ax / be
Bluetooth supportYes
Ports & slots
PCIe 5.0 x16 slots2 x PCI Express 5.0 x16
PCIe 4.0 x16 slots2 x PCI Express 4.0 x16
PCIe x16 slots2 x PCI Express x16
PCIe x4 slots1 x PCI Express x4
Additional slots1 x M.2 (Key-E)
Rear panel ports9 x USB 10 Gbit/s Type-A, 2 x USB 10 Gbit/s Type-C, 2 x USB 40 Gbit/s Type-C, 1 x HDMI, 1 × 10G LAN, 1 × 5G LAN, 1 x Optical S/PDIF-Out
Video connectorsHDMI + 2 x Display Port
HDMI ports1 x HDMI
Ethernet port2 x RJ45
DisplayPort connectors2 x DisplayPort
USB 3.1 ports11 x USB 3.1
USB 3.0 ports4 x USB 3.0
USB 2.0 ports4 x USB 2.0
USB-C ports2 x USB Type-C® port, with USB 40 Gbit/s support; 2 x USB Type-C® port, with USB 10 Gbit/s support; 1 x USB Type-C® port, with USB 20 Gbit/s support
S/PDIF output1 x Optical
Audio jacks5 Ports
Onboard USB headers4 x USB 3.2 + 4 x USB 2.0 + 1 x USB Type-C header, with USB 3.2 Gen 2 × 2
Power
Power connectors24 Pin
Size & build
Form factorATX
Width and length243.84 mm × 304.8 mm
Compatibility
Windows 11 supportSupported
More details
South bridgeAMD X870E
S-videoNo
LightingRGB

Other versions of this model

5 more in the same range

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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