Does the MSI MEG X670E ACE fit in a standard ATX computer case?

No, this is an Extended-ATX (E-ATX) motherboard. It measures 277mm wide compared to the standard 244mm of ATX. You must ensure your computer chassis explicitly lists compatibility with E-ATX motherboards and has clearance for the cable management routing ports.

Do I need to plug in both 8-pin CPU power connectors for the board to operate?

While the system can boot and run standard tasks with just one 8-pin power cable connected, it is highly recommended to populate both CPU power connectors. This maintains safety, prevents cable heating, and guarantees stable power delivery under heavy loads or overclocking.

How do I configure the front panel USB-C port to output 60W Power Delivery?

To enable the full 60W Power Delivery (PD) fast charging on the front panel Type-C header, you must plug in the dedicated 6-pin PCIe power connector located near the bottom edge of the motherboard. Without this additional cable populated, power delivery is restricted to standard low-wattage rates.

What is the purpose of the bundled M.2 XPANDER-AERO Gen 5 card?

The M.2 XPANDER-AERO Gen 5 card is an auxiliary expansion card that plugs into a vacant PCIe slot. It adds two extra PCIe 5.0 M.2 slots to your setup. It features an integrated active fan and a heavy cooling shroud to prevent throttling on high-speed solid-state drives.

Can I use AMD EXPO profiles for high-speed DDR5 on this motherboard?

Yes, the MEG X670E ACE fully supports AMD EXPO (Extended Profiles for Overclocking) and Intel XMP profiles. You can enable them with a single click in the BIOS. For speeds beyond 6000MHz, make sure you are running the latest BIOS version to benefit from memory controller stability updates.

Is the rear 10Gbps Ethernet backward compatible with slower networks?

Yes, the onboard Marvell 10Gbps Ethernet port is fully backward compatible. It will automatically negotiate to negotiate the highest possible speed supported by your local network equipment (including 5Gbps, 2.5Gbps, 1Gbps, or 100Mbps).

MSI MEG X670E ACE

Enthusiast E-ATX Mastery with Uncompromising 22-Phase Power, 10G Super LAN, and PCIe 5.0 Dominance

Overview

The MSI MEG X670E ACE is a premium enthusiast-class motherboard designed to push the absolute limits of the AMD Socket AM5 platform. Built on the flagship AMD X670 Chipset, this Extended-ATX (E-ATX) behemoth combines a massive power delivery system, advanced active cooling, and bleeding-edge connectivity for demanding PC builders and overclockers. Adorned in a signature black-and-gold aesthetic, it features PCIe Gen 5 support across both its primary graphics slots and storage channels, alongside ultra-high-speed 10Gbps Ethernet networking. The motherboard is meticulously engineered to unlock the maximum potential of AMD Ryzen 7000, 8000, and 9000 Series processors, making it a definitive cornerstone for workstation-class productivity and hardcore gaming rigs.

How It Works

The MSI MEG X670E ACE acts as the ultimate neurological system for your high-performance hardware, routing signals and power through highly engineered physical layers.

Phase-Shifted Power Conversion

Transforms high-voltage power from the power supply through dual 8-pin EPS connectors down to clean, precise voltage for the AM5 processor using a massive 22+2+1 Duet Rail Power System operating with 90A Smart Power Stages (SPS).

PCIe Gen 5 Signal Conditioning

Utilizes a server-grade 8-layer PCB with 2oz thickened copper to maintain ultra-fast PCIe 5.0 signal integrity, reducing crosstalk and electromagnetic interference across high-speed lanes.

Dynamic Heat Dissipation

Conducts heat away from VRMs and M.2 SSDs using a Stacked Fin Array Heatsink, connected via a direct-touch heatpipe to transfer thermal load efficiently to passive cooling plates.

Optimized Memory Routing

Implements MSI's isolated Memory Boost topology, protecting DDR5 memory trace signals from motherboard noise to enable stable overclocking past 8000+ MHz via AMD EXPO profiles.

Key Features

22+2+1 Phase Direct VRM

Equipped with a brutal power design featuring 90A Smart Power Stages to feed clean, stable power to heavily overclocked Ryzen processors.

Full PCIe 5.0 Support

Multiple PCIe 5.0 x16 slots and onboard PCIe 5.0 M.2 slots provide up to 128GB/s of unidirectional bandwidth for modern GPUs and storage.

Marvell 10Gbps Super LAN

Provides enterprise-grade network speeds up to 10,000 Mbps for lightning-fast file transfers, NAS backups, and lag-free gaming.

Dedicated Wi-Fi 6E & Bluetooth 5.3

Operates on the exclusive, low-congestion 6GHz band to guarantee ultra-stable, high-speed wireless connectivity.

M.2 XPANDER-AERO Gen 5 Card

An included PCIe add-in-card that adds two additional high-performance PCIe 5.0 M.2 slots under an active cooling fan shroud.

Front Panel USB 3.2 Gen 2x2 with 60W PD

Features a front-panel Type-C port supporting USB Power Delivery up to 60W, letting you fast-charge devices straight from your PC chassis.

Stacked Fin Array Cooling

Dual heatsinks connected via a heatpipe with 7W/mK thermal pads ensure massive thermal absorption for the power phase components.

ESS ES9280AQ DAC & ALC4082 Audio

Premium onboard audio processing with an integrated DAC, driving audiophile-grade headphone signals up to 600 Ohms.

Extreme Power Delivery and VRM Design

Unmatched Overclocking Stability with 22+2+1 Duet Rail Architecture

90A Smart Power Stages

Handles massive electrical currents safely, spreading thermal loads evenly across individual power stages.

Dual 8-Pin CPU Power Connectors

Ensures adequate power overhead for heavy multi-threaded workloads without melting connectors.

Digital PWM Controller

Delivers real-time, micro-second precision digital voltage regulation to prevent CPU instability.

Titanium Choke III Core

Advanced high-efficiency chokes that minimize power loss and reduce high-frequency coil whine.

Next-Gen Storage and Expansion

Blistering Speeds with Native PCIe Gen 5 Integration

PCIe 5.0 M.2 Support

Onboard slot running directly off CPU lanes for speeds exceeding 14,000 MB/s on next-gen Gen 5 SSDs.

Double-Sided M.2 Shield Frozr

Heavy-duty aluminum thermal plates sandwich the M.2 SSDs, preventing thermal throttling on both sides of the drive PCB.

Multi-GPU Optimization

Supports PCIe 5.0 x8/x8 configurations, allowing dual high-performance graphic cards or compute accelerators to run at peak throughput.

Screwless M.2 Installation

Magnetic and tool-free latch mechanism simplifies adding or swapping out high-performance solid-state storage.

Elite Thermal Management

Active and Passive Cooling Solutions Working in Unison

Stacked Fin Array Heatsink

Significantly increases the heat dissipation surface area compared to traditional blocky aluminum heatsinks.

Direct Contact Heatpipe

A cross-metal heatpipe connects the two main VRM heatsinks directly, equalizing and lowering peak temperatures.

Chestplate Backplate

A solid metal backing plate prevents motherboard warping and dissipates heat from the back of the power circuitry.

Smart Fan Headers

Eight onboard hybrid fan headers automatically sense if a connected fan is DC or PWM for optimal curve calibration.

Network and External Connectivity

10Gbps LAN and Modern Connectivity for High-Speed Workflows

Marvell AQC113CS 10GbE

Delivers network bandwidth up to 10x faster than standard gigabit ethernet, perfect for localized NAS file transfers.

Dual USB-C 20Gbps Ports

Rear I/O features high-bandwidth Type-C connections capable of running professional capture cards and external RAID enclosures.

Wi-Fi 6E Wireless

Accesses the unpolluted 6GHz spectrum for wireless transfer speeds that rival standard copper ethernet runs.

AMD Bluetooth 5.3

Provides lower latency, improved range, and multi-device connection reliability for wireless peripherals.

Audiophile Grade Hardware

Audio Boost 5 HD Powered by Realtek and ESS Sabre DAC

Realtek ALC4082 Codec

Processes audio up to high-resolution 32-bit/384kHz formats through dedicated internal lanes.

ESS ES9280AQ DAC

A high-performance digital-to-analog converter that eliminates distortion and offers supreme dynamic range.

Dedicated Audio Capacitors

Gold audio-grade capacitors guarantee natural, warm sound representation for both analog speakers and headphones.

De-pop Relay Protection

Eliminates annoying pops and clicks in connected headphones when plugging/unplugging devices or powering on the system.

✓ Pros

✓Overkill 22+2+1 power phases with 90A SPS handles any AM5 CPU easily
✓Ultra-fast Marvell 10Gbps Ethernet on rear I/O is excellent for creators and NAS users
✓Comprehensive PCIe Gen 5 support across multiple x16 slots and M.2 NVMe slots
✓Included M.2 XPANDER-AERO Gen 5 card expands storage options significantly
✓Premium aesthetic featuring a heavy-duty backplate and clean black/gold finish
✓Front panel USB Type-C supports 60W USB Power Delivery for rapid charging
✓Excellent diagnostic tools including a debug code LED and physical Power/Reset buttons
✓High-end ESS ES9280AQ DAC provides desktop-class audio performance

✗ Cons

✗E-ATX form factor makes it too wide for standard mid-tower chassis options
✗Premium pricing makes it a poor value prospect for typical gaming-only builds
✗No native USB4 ports on rear panel without using accessory add-on cards

Use Cases

Extreme overclocking rigs aiming for record-breaking benchmarks using liquid nitrogen or custom water loopsProfessional content creation workstations requiring continuous high-speed transfers to localized 10G NAS systemsHigh-end multi-GPU machine learning workstations requiring bifurcation on PCIe Gen 5 lanesEnthusiast gaming systems built within massive premium E-ATX showpiecesUncompromising storage servers requiring up to six concurrently running high-speed M.2 NVMe SSDs

Technical Specifications

Socket

AMD Socket AM5

Chipset

AMD X670E (Extreme)

Form Factor

E-ATX (304.8mm x 277mm)

Power Phases

22 + 2 + 1 Duet Rail Power System

Smart Power Stages

90A SPS

Memory Support

4x DDR5, Dual Channel, up to DDR5-8000+ (OC)

Expansion Slots

3x PCIe 5.0 x16 slots (runs x16/x0/x4 or x8/x8/x4)

Onboard M.2 Slots

4x M.2 (1x PCIe 5.0 x4, 3x PCIe 4.0 x4)

Extra M.2 Slots

2x PCIe 5.0 x4 (via included XPANDER-AERO Card)

Ethernet Controller

1x Marvell AQC113CS 10Gbps LAN

Wireless Connectivity

AMD Wi-Fi 6E, Bluetooth 5.3

Audio Codec

Realtek ALC4082 + ESS ES9280AQ Combo DAC

Rear USB Ports

1x USB 3.2 Gen 2x2 Type-C, 3x USB 3.2 Gen 2 Type-C, 8x USB 3.2 Gen 2 Type-A

Multi-GPU

AMD Multi-GPU Technology Supported

Battle of the High-End X670E Mainboards

Feature	megX670eAce	rogCrosshairX670eHero	x670eAorusMaster
Power Phase Setup	22+2+1 Phase (90A)	18+2 Phase (110A)	16+2+2 Phase (105A)
Wired LAN Controller	Marvell 10Gbps Ethernet	Intel 2.5Gbps Ethernet	Intel 2.5Gbps Ethernet
Onboard M.2 Capacity	4 Onboard Slots (+2 via XPANDER)	4 Onboard Slots (+1 via Card)	4 Onboard Slots
Form Factor Size	E-ATX	ATX	E-ATX
Front USB Charging PD	Yes (Up to 60W)	Yes (Up to 60W Quick Charge 4+)	No (Standard Charging)
Audio Configuration	ALC4082 + ESS Sabre DAC	ALC4082 + ESS ES9218 Quad-DAC	Realtek ALC1220-VB Codec

Setup Tips

Perform a Flash BIOS Update

Before mounting components, use the rear Flash BIOS Button with a FAT32 USB drive to update the motherboard firmware. This guarantees day-one compatibility with newer AMD Ryzen 8000/9000 series processors.

Populate the PCIe 6-Pin Power Header

If your case has a front-panel Type-C port and you plan to fast-charge devices, connect a dedicated 6-pin PCIe power cable from your PSU into the onboard port to enable up to 60W power delivery capabilities.

Carefully Align in your E-ATX Chassis

Due to the extreme width (277mm) and the premium protective backplate, install the motherboard slowly. Watch for alignment with the case's built-in cable grommets and verify that pre-installed standoffs do not short-circuit the backplate.

Utilize the Primary M.2 Slot First

Always install your operating system drive in the top M.2 slot (M2_1). This slot routes directly to the CPU's dedicated PCIe 5.0 lanes, bypassing the chipset entirely to minimize system storage latency.

Frequently Asked Questions

Key Takeaway

The MSI MEG X670E ACE is an exceptional Extended-ATX motherboard that maximizes the performance ceiling of the AMD AM5 platform. Equipped with an overkill 22-phase VRM system and elite connectivity options like 10Gbps Ethernet, it is ideally suited for workstations and enthusiasts. Its premium design features multiple PCIe 5.0 slots and advanced thermal solutions, ensuring high-speed stability under extreme workloads runtimes operate run smoothly without compromise.