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Black ATX motherboard with silver heatsinks and matching Ryzen 9 9900X CPU in clear clamshell packaging

MSI

MSI MEG X870E ACE MAX AMD motherboard & Ryzen 9 9900X CPU combo

SKU CH-MDNG-T1MGD

AM5 motherboard and 12-core Ryzen 9 9900X CPU combo with 256GB DDR5 support, 5.6GHz boost, 110A VRM and 10G plus 5G LAN

  • CPU Socket TypeAM5
  • ChipsetAMD X870E
  • South BridgeAMD X870E
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel

CPU +Ryzen 9 9900X

  • 12 cores and 24 threads for heavy multitasking with Ryzen 9 9900X
  • 6 GHz max boost clock for responsive single-thread speed
  • 110 A SPS VRM with 18+2+1 DRPS delivers stable power under load
  • DDR5 memory support up to 9000+ MT/s OC for high bandwidth
  • 5 M.2 slots with PCIe 5.0 x4 and PCIe 4.0 x4 for fast storage expansion

Combo foundation

The MSI MEG X870E ACE MAX motherboard paired with a Ryzen 9 9900X CPU forms a ready-to-run platform for Socket AM5. The board delivers an X870E chipset, four DDR5 slots supporting up to 256GB, and a 64MB BIOS ROM for broad processor compatibility. The included 12-core, 24-thread processor reaches a 5.6 GHz max boost and provides 64 MB L3 cache. This combination targets builders who want high-end multi-threaded performance without separate component selection.

Platform step-up

The X870E chipset replaces earlier AM5 chipsets by adding native PCIe 5.0 support for both graphics and storage, plus 10G and 5G LAN ports. The 18+2+1 DRPS power stage rated at 110A SPS supersedes weaker VRM designs that limit sustained boost clocks. The jump is worthwhile when moving from a 7000- or 8000-series CPU to the 9900X, or when a build demands dual PCIe 5.0 x16 slots and five M.2 sockets for high-speed storage arrays.

Sustained delivery

The Frozr thermal stack uses a wavy fin heatsink, direct-touch heat-pipes, aluminum covers, double-sided M.2 shields and a metal backplate managed by Frozr AI software. Together with the 110A SPS VRM and OC Engine clock generator, this keeps the 9900X at high frequencies during prolonged workloads rather than throttling after a short burst. Dual-channel DDR5 up to 9000+ MT/s OC and four SATA 6Gb/s ports remain stable under continuous data throughput.

Highlights

  • 12 cores and 24 threads for heavy multitasking with Ryzen 9 9900X
  • 6 GHz max boost clock for responsive single-thread speed
  • 110 A SPS VRM with 18+2+1 DRPS delivers stable power under load
  • DDR5 memory support up to 9000+ MT/s OC for high bandwidth
  • 5 M.2 slots with PCIe 5.0 x4 and PCIe 4.0 x4 for fast storage expansion

Specifications

BrandMSI
SeriesMEG
ModelMEG X870E ACE MAX+R9 9900X
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

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Questions about this item

What case clearance does the 18+2+1 DRPS power delivery and double-sided M.2 Shield Frozr require?

The board fits a standard ATX case; the VRM heatsink and M.2 shields add height, so verify CPU-cooler clearance and that the case allows tall heatsinks near the socket.

Which step do builders often skip when seating the Ryzen 9 9900X in the AM5 socket?

After placing the CPU, the lever must be lowered fully until it clicks; a partial latch leaves pads uncontacted and prevents POST.

When should the thermal paste on the Ryzen 9 9900X be reapplied?

Reapply whenever the cooler is removed; the 12-core chip runs hot under load, so fresh paste keeps the Frozr heatsink effective.

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