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

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.

How it compares

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

Price $1,268.99
Pricier than about 91% 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 9900X
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

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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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