MSI MEG X870E ACE MAX + Ryzen 9 9950X Combo AMD Motherboard
- AM5
- AMD X870E
MSI
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 +Ryzen 9 9900X
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.
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.
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.
| Brand | MSI |
|---|---|
| Series | MEG |
| Model | MEG X870E ACE MAX+R9 9900X |
| CPU Socket Type | AM5 |
| Chipset | AMD X870E |
| South Bridge | AMD X870E |
| Number of Memory Slots | 4x288pin (DDR5) |
| Maximum Memory Supported | 256GB |
| Channel Supported | Dual Channel |
| ECC Supported | Non-ECC |
| Buffer Supported | Un-buffered |
| PCI Express 5.0 x16 | 2 x PCI Express 5.0 x16 |
| PCI Express 4.0 x16 | 2 x PCI Express 4.0 x16 |
| PCI Express x16 | 2 x PCI Express x16 |
| PCI Express x4 | 1 x PCI Express x4 |
| Other Slots | 1 x M.2 (Key-E) |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
| M.2 | 5 x M.2 (Support PCIe 5.0 x4 & PCIe 4.0 x4) |
| SATA RAID | 0/1/10 |
| Audio Chipset | Realtek ALC4082 |
| Audio Channels | 7.1 Channels |
| LAN Chipset | Marvell AQC113CS, Realtek 8126 |
| Second LAN Chipset | Realtek 8126 |
| Max LAN Speed | 10Gbps + 5Gbps |
| Wireless LAN | WiFi IEEE 802.11 a / b / g / n / ac / ax / be |
| Bluetooth | Yes |
| Back I/O Ports | 9 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 Ports | HDMI + 2 x Display Port |
| S-Video | No |
| HDMI | 1 x HDMI |
| RJ45 | 2 x RJ45 |
| DisplayPort | 2 x DisplayPort |
| USB 3.1 | 11 x USB 3.1 |
| USB 3.0 | 4 x USB 3.0 |
| USB 1.1/2.0 | 4 x USB 2.0 |
| USB Type-C | 2 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 Out | 1 x Optical |
| Audio Ports | 5 Ports |
| Onboard USB | 4 x USB 3.2 + 4 x USB 2.0 + 1 x USB Type-C header, with USB 3.2 Gen 2x2 |
| Form Factor | ATX |
| LED Lighting | RGB |
| Dimensions (W x L) | 243.84mm x 304.8mm |
| Power Pin | 24 Pin |
| Windows 11 | Supported |
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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.
After placing the CPU, the lever must be lowered fully until it clicks; a partial latch leaves pads uncontacted and prevents POST.
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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