MSI X299 Gaming M7 ACK Visual Inspection

Our first real glimpse of the board on the previous page shows the Gaming M7 ACK isn't a run of the mill budget board. For its price point, it certainly shouldn't be. The PCB is matte black with only a few distinguishing colors, with all heatsinks and shrouds a grey color. The back panel IO shroud extends down through the PCIe area and covers the audio bits in the process. The color is left to the RGBs: the back panel IO portion has RGB LEDs, along with five more between the PCIe slots on the bottom portion of the shroud. The power delivery heatsink sitting above the socket also includes integrated RGB LEDs.

What is easily noticable when looking at the board is the chipset heatsink, which is quite unique with its shape. The heatsink, along with cooling the chipset, doubles as an M.2 module cooler, with arms spreading out between the PCIe slots. While having M.2 cooling isn't unique by itself, the cooling is hinged with the chipset heatsink, allowing the cooler to pop up rather than be removed entirely. I have to say this is one of the more clean implementations of a robust M.2 cooler.


Diving into the specifics of the board, the MSI Gaming M7 ACK includes a total of six fan headers. On the top is where the CPU Fan 1, Pump Fan 1, and SYS Fan 1 reside, with the latter two located in the upper right-hand corner by the debug LED, and the CPU Fan on the left above the DRAM slots and to the left of the EPS power connectors. The remaining three headers, called SYS Fan 2/3/4, are located at the bottom of the board. All six headers have the ability to control the attached fans via PWM or DC. The CPU and Pump fans have an LED to indicate the fan control mode visually with red being PWM and green DC. MSI documentation does not mention if any of the headers are high amperage.

For the power delivery, MSI touts a 12-phase power delivery with 10-phases (a doubled 5-phase design) going to the CPU, and another phase for the VCCSA. Driving these are International Rectifier's IR3550 fully integrated power stages with an IR35201 multi-phase buck controller. The doubling duties are handled by five IR3599 doublers. The memory power delivery uses a Primarion PV4210 PWM with each memory phase using two 25A/40A NexFETs, in the CSD87350Q. Sending power to the VRMs is an 8-pin EPS and an (optional) 4-pin EPS connector. These premium power bits are the same that we found on the X299 Gaming Pro Carbon AC. 

The board comes with eight slots for memory, which are all reinforced by MSI's Steel Armor. Keeping the memory locked in place is a single latch on the top of the DRAM slot. Compared to dual latch systems, the single latch is a bit easier when the system is installed, and still locks the sticks down securely, but might require a double check on the bottom latch to make sure the memory is in place. The board supports both Dual and Quad channel DDR4 with capacity up to 128GB. Memory speed for quad-channel processors is up to DDR4-4266, and DDR4-4500 with dual-channel processors. 

The top-down image of the right side of the board shows, in the bottom corner, two of the eight SATA ports oriented vertically from the board. This follows with a U.2 connector, the six SATA ports, a front panel USB 3.1 header, and a pair of USB 3.0 headers. 

To the right of the 24-pin ATX connector are EZ debug LEDs (4), for Boot, DRAM, VGA, and CPU, which give a visual display of where the board is at in POST. Located directly to the left of those are a miniature set of voltage read points covering Vcore, VCCIO, VCCSA, DDR, CPU (input voltage), and Ring voltage. These are quite helpful when extreme overclocking, rather than relying on software readouts.

Across the bottom of the motherboard, there are several IO headers and a couple of buttons. From left to right we see:

  • Front Panel Audio
  • RGB LED header
  • Sys Fan 2/3/4 headers
  • Front Panel connectors
  • 2 x USB 2.0 headers
  • VROC header
  • Power Button
  • Reset Button
  • Game Boost knob, that goes up to 11
  • 2 x SATA ports

Hidden under the shroud on the left, connecting to the front panel audio, are two Realtek ALC1220 audio chips. Two is not a typo. MSI has one set up for front panel audio, and the other for audio output on the rear. It also uses Chemicon Gold Series audio capacitors for the front and rear outputs as well as separated audio layers for the left and right channels. 

The bottom half of the board has a total of six PCIe slots with all four full-length slots reinforced. Between the full length slots are two x4 slots connected via the chipset. The primary video card slots are all CPU connected (lane breakdowns in the table below). The primary video card slot slots are, from top to bottom, slots one and four. This configuration allows for double and triple wide cards to fit. Any three-way SLI/Crossfire action will utilize slot 6 (bottom slot). 

Below is a simplified list of  how the PCIe slots will work with each family of CPUs (talking PCIe lanes) when multiple cards are used (the "@" symbol is used to show slot preference for the configuration):

MSI X299 Gaming M7 ACK CPU PCIe Layout
PCIe 1 @x16 @x16 @x16 @x8 @x8 @x8
PCIe 3 x4 x4 x4 x4 x4 -
PCIe 4 @x16 @x16 @x8 @x8 x4 @x8
PCIe 6 x8 @x8 - @x8 - -
SLI Yes Yes Yes Yes - Yes
Crossfire Yes Yes Yes Yes - Yes

So what might seem odd here is that the PCIe 3 slot is listed as PCIe 3.0 x4 from the CPU in all configurations, despite being a full sized slot. This is due to the breakdown with the PCIe lanes for the U.2/M.2 slots.

The back panel IO has the following connectors:

  • 1 x Clear CMOS
  • 1 x BIOS Flashback+ button
  • 1 x PS/2 Keyboard/mouse combo port
  • 3 x USB 2.0 ports
  • 2 x Wi-Fi Antenna connectors
  • 4 x USB 3.1 (5 Gbps) ports
  • 1 x LAN (RJ45) ports
  • 1 x USB 3.1 (10 Gbps) Type-A port
  • 1 x USB 3.1 (10 Gbps) Type-C port
  • 1 x Optical S/PDIF OUT connector
  • 5 x OFC audio jacks

In the Box

The MSI X299 Gaming M7 ACK includes the following accessories:

  • Driver & Utilities Disk
  • Motherboard User Guide
  • 4 x SATA cables
  • IO Shield
  • SLI HB Bridge M
  • 1 x 1 to 2 RGB LED Extension Y Cable (80cm)
  • Quick Installation Guide, SATA Labels, Manual
  • 3D X-Mounting Screw pillars
  • Case badge
  • 2 x Antenna

MSI X299 Gaming M7 ACK Overview BIOS and Software


View All Comments

  • Lolimaster - Tuesday, March 6, 2018 - link

    Downloading barely affects gaming sessions (game data downloaded from an online match is small), uploading beyond a certain threshold will kill it (climbing ms+). Reply
  • andychow - Monday, March 5, 2018 - link

    I like the presence of U.2, but killer networking + RGB LEDS = no way I'm buying that. The RGB LEDs you can probably turn off, which just wastes a little money. But killer networking is really the deal breaker. It's something most people would pay extra to not have. Why do board makers ever accept using this brand?

    Even when killer hardware is based on Intel (these aren't), their custom firmware and drivers is just junk.

    Look online, most people that have the Killer 1535 just end up getting another wifi card.
  • Gothmoth - Monday, March 5, 2018 - link

    no word about the bios issues... anandtech articles are now basically just a feature list with more words. Reply
  • Joe Shields - Wednesday, March 7, 2018 - link

    What BIOS issues? I did not run into any throughout testing. Perhaps the BIOS used fixed something from previous versions? Do you have a link to said problems? Reply
  • timecop1818 - Monday, March 5, 2018 - link

    > What happens when a vendor adds 802.11ac to Killer networking?

    You lose sales.
    Fuck killer and fuck any vendor that uses their shit.
  • jjj - Monday, March 5, 2018 - link

    1 year later, AT still avoids Ryzen mobos with extreme ferocity.
    And it gets so much worse worse, you focus on X299, a platform almost nobody buys.
    Go count the mobo reviews in the last year. By my count , you got;
    12 reviews for X299
    6 reviews for for Z270
    2 reviews for for Z370

    2 reviews for X370
    1 review for TR

    Objectivity and serving the reader might not be this site's goal but even if your goal is to sell hardware, how is focusing on products that do not sell, serving your financial interests.
    The way this makes sense, is if someone is paying you to promote x299 at any cost. Otherwise, what you are doing is insanity.
  • Qasar - Monday, March 5, 2018 - link

    quote from Ian :
    As for the glut of X299 reviews, we have different reviewers for each chipset/socket: Joe on X299/Z370, Gavin on AM4, Tracy on TR4. Tracy has been waylayed due to lack of hardware, Gavin is new so getting up to speed, and Joe is powering through. Joe is only just moving to Z370 as well, and has a few of those already half-done.

    that could explain things a little as to why there are very few ryzen reviews.......
  • Lolimaster - Tuesday, March 6, 2018 - link

    Anyone knows they're intel shills, also toms (both part of purch) at least toms safe face with more dignity. Reply
  • ralstonater - Tuesday, March 6, 2018 - link

    "The 802.11ac module supports Bluetooth 4.1 and speeds up to 867 Gbps."

    While technology moves at incredible paces I wholly doubt that the wireless AC supports that fast of a connection ;)
  • Joe Shields - Wednesday, March 7, 2018 - link

    Corrected. Thanks! Reply

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