Scan code: LN79116 Manufacturer code: B350 TOMAHAWK

MSI AMD AM4 Ryzen B350 TOMAHAWK ATX Motherboard

MSI B350 TOMAHAWK, AMD B350, S AM4, DDR4, SATA3, M.2 (PCIe), 2-Way CrossFire, Realtek LAN, USB 3.1 Gen1 A+C, ATX

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Scan code: LN79116 Manufacturer code: B350 TOMAHAWK
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  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

Ryzen Gaming Motherboard from MSI. TOMAHAWK B350 Series

AM4 MSI Motherboard
Dominate the Game with Arsenal Gaming PCB

Featuring heavy plated heat sinks and fierce looks, MSI ARSENAL GAMING motherboards are packed with gaming features for a refined gaming experience. All that gaming tech is backed up by a reinforced structure and heavily tested components to ensure long-lasting, high-quality performance.

"We are proud to be a part of the MSI GAMING testing program to help give gamers the best hardware to play games at the highest level."
- Olof 'olofmeister' Kajbjer, Fnatic CS:GO Team

AMD B350

CPU Socket

Form Factor

LED Indication Lighting

AM4 MSI Motherboard Feature
Personalize your Gaming Rig

Connect external RGB strips and sync other RGB capable gear to set up your own color scheme using only 1 application: Mystic Light Sync. Select any of the colors from the palette using your smartphone or the MSI Gaming App to match your system style. Feel like using a different color? Completely change the look of your system in 1 second!

Works with certified Mystic Light Sync products

Compatible Mystic Light Brands

Reactive Fan Technology

AM4 MSI Motherboard Feature
Utilise MSI Board and Command Center

MSI FAN headers automatically detect fans running in DC or PWM mode for optimal tuning of fan speeds and silence. Hysteresis also makes your fans spin up fluently to make sure your system stays silent.

Optimized SSD Storage

AM4 MSI Motherboard Feature
Exceptional X-Boost tech enhancments

When enabled, X-Boost auto-detects and optimizes your SSDs to keep your system fast and maximize storage performance, making sure you reach the battlefield even quicker or saving you a lot of time when transferring data.

Gaming Boosts with MSI B350

AM4 MSI Motherboard Feature
Unique MSI gaming advantages

Outsmart and outperform your opponents in-game using an array of unique MSI GAMING tools. Clever hardware & software tools, created to keep you one step ahead of the competition and boost your skills.


VR Ready
Immersive Virtual Reality Power

Want the best of the best VR experience without any compromise? Through joint efforts with major VR brands, combined with unique MSI features geared to VR, MSI brings gamers and VR professionals a vivid, smooth and realistic experience in which content truly comes alive.

Pro Gaming Audio

  • Isolated Audio with LED Line LED Line
  • Chemi-Con Audio capacitors Audio Capacitors
  • Nahimic 2 Sound Tracker Nahimic Sound Tracker
amplify your in-game audio with audio boost 4

Like a dedicated sound card Audio Boost 4, powered by Nahimic, offers a HD audio processor, dedicated amplifier and high quality audio capacitors, all physically isolated from the rest of the motherboard circuitry to ensure the purest audio signal to locate enemies with pin-point accuracy.

Game with Low Latency

AM4 MSI Motherboard Feature
Dominate the Game with MSI LAN

Get ready to crush your enemies on the battlefield with MSI GAMING LAN. Featuring the highest quality components tuned to deliver the best online gaming experience without lag.

DDR4 Memory Potential

DDR4 Memory Performance
Unmatched Signal Purity & Compatibility

Memory Signal Purity - MSI motherboards are crammed with features to fuel your gaming rig’s memory with more speed, higher overclockability and increased stability.
Best Compatibility - Optimized traces and a fully isolated memory circuitry ensures perfect stability and performance, so you never have to worry about your system crashing during games.

USB Type-C Boosting

AM4 MSI Motherboard Feature
Maximize your USB Device performance

Transfer your favorite games, music and movies over USB faster than ever. MSI offers a wide variety of options to connect and boost your USB 3.1 devices, delivering lightning-fast transfer speeds!

High-End Components

AM4 MSI Motherboard Feature
Built on everlasting quality

Only the finest quality components and latest innovations are used. Rigorous quality testing under the most extreme conditions ensures a super reliable, high performance motherboard.

Core Specifications
Form Factor ATX
CPU Socket AM4
Chipset AMD B350
RAM Memory Support
Memory Type DDR4
Memory Channel Dual (2)
Memory Type (ECC) Non-ECC
Memory Type (R/U) UDIMM (Unbuffered)
Memory Speed (Mhz)
  • DDR4 - 1866
  • DDR4 - 2133
  • DDR4 - 2400
  • DDR4 - 2666(OC)
  • DDR4 - 2933(OC)
  • DDR4 - 3200+(OC)
Max. Memory Capacity 64GB (4x16GB)
Audio Realtek ALC892 7.1 HD Audio
Graphics Support
Primary GPU Interface PCIe 3.0 (x16)
NVIDIA SLI Support Not Supported
AMD CrossFire Support 2-Way CrossFire
Integrated Graphics  
On-Board Graphics Connectors
  • D-Sub (VGA)
  • DVI-D
  • HDMI
Internal Connectivity
Expansion Slots
  • 1 x M.2, 2242/2260/2280/22110, PCIe 3.0/SATA
  • 2 x PCI
  • 2 x PCIe 2.0 x1
  • 1 x PCIe 2.0 x16 (x4 Bandwidth)
  • 1 x PCIe 3.0 x16
SATA Support SATA3 / M.2
RAID Support via SATA
Storage Mode Support
  • NVMe Boot (via M.2 PCIe Slot)
  • NVMe Boot (via PCIe 3.0 Slot)
  • RAID 0
  • RAID 1
  • RAID 10
Internal I/O
  • 1 x 24-pin (Power)
  • 1 x 4-pin CPU Fan Connector
  • 4 x 4-pin System Fan Connector
  • 1 x 4-pin Water Pump Connector
  • 1 x 8-pin (Power)
  • 1 x Chassis Intrusion connector
  • 1 x Clear CMOS jumper
  • 1 x Front Panel Audio Header
  • 1 x Parallel Port (LPT) Header
  • 1 x RGB LED connector
  • 4 x SATA III - 6Gb/s
  • 1 x Serial (COM) Header
  • 2 x System panel connector
  • 1 x TPM Header
  • 2 x USB 2.0 Header
  • 2 x USB 3.1 Gen1 Header
External Connectivity
Network Interface Type Wired Gigabit LAN (10/100/1000)
Network Chip/Modules 1 x Realtek RTL8111H (Gigabit LAN)
Rear I/O Connectors
  • 1 x 10/100/1000 (LAN)
  • 3 x Audio I/O
  • 1 x D-Sub (VGA) Out
  • 1 x DVI-D
  • 1 x HDMI
  • 1 x Line In
  • 1 x Line Out
  • 1 x Mic-In
  • 1 x PS/2 Keyboard/Mouse Combo
  • 2 x USB 2.0
  • 3 x USB 3.1 Gen1 Type-A
  • 1 x USB 3.1 Gen1 Type-C
Additional Specifications
Water Cooled No
QPI Speed N/A
Board Dimensions  

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

36 months
Return to base
DOA Period:
28 days
RTB Period:
36 months
Manufacturer Contact Details
0871 472 4747
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TekSpek Guides
AMD Ryzen Chipset
AMD Ryzen Chipset
Date Issued: 20th Nov 2017

AMD made waves in the premium consumer CPU market during March 2017 when it debuted Ryzen processors based on the Zen architecture that had been in development for the previous four years

Read More

MSI B350 TOMAHAWK, AMD B350, S AM4, DDR4, SATA3, M.2 (PCIe), 2-Way CrossFire, Realtek LAN, USB 3.1 Gen1 A+C, ATX is rated 4.4 out of 5 by 7.
Rated 4 out of 5 by from Good board, but some caveats. The board has several great features: It has an EZ debug LED, which can tell you why your board is not posting if there is an issue with the RAM, CPU or GPU. The steel PCI-E slot adds some peace of mind if you move your PC around a lot. A dedicated pump header as well as headers for five fans and a cpu fan is adequate for most people needs. I am using all of them, but there is a reason for that. However, my last B350m died in under a year from blown VRM caps. If you get this board, make sure there is adequate airflow moving past the VRMs, especially if you plan on using an AIO water cooler. Its not really a deal breaker with the board, just something to be aware of.
Date published: 2018-07-28
Rated 5 out of 5 by from With an updated BIOS, this board works like a dream. So, I was quite nervous about this board. I'd read that it was the best value B350 motherboard available from several reviewers, but I also got to see the kinds of issues that early adopters were having with this board, and I wasn't sure how many of those issues I would encounter myself. The biggest concern I had was that it may not like the RAM that I got, and even if it was properly detected and worked at stock speeds, the rated speed would not be achievable. Even with the BIOS that came out-of-the-box, I did not encounter this problem. XMP profiles work flawlessly. One problem that I did encounter, however, was very slow POST times (not related to the typically slow POST from the very first cold boot on Ryzen systems). This was something I was very much aware of going in, and I was confident that a BIOS update would fix it. On the latest BIOS, it takes less than 20 seconds between pressing the power button and being presented with my Lubuntu login screen (installed on a Samsung 850 EVO). Windows 8.1 takes a similar amount of time in a typical boot up. My only gripe is that there is no POST beep (and yes, I did remember to install a speaker!), however there is an option to have the Caps Lock light turn on upon successful POST. Now, as you can probably tell from my complaint about a POST beep, I'm pretty old school. This is also reflected in the way that I have my operating systems set up. Although I have UEFI support on both this board and my last one, I have my boot drives set up with MBR (legacy BIOS) instead of GPT (UEFI). This was made necessary by the previous board, which had very few boot options. Installing a UEFI OS would potentially hijack the entire booting process, and I needed access to a legacy boot menu. The boot options on this board are, quite frankly, f**king awesome! There is a very nice UI on the landing page in the BIOS, which allows you to prioritise, not only all of your boot devices, but whether or not it boots them up in UEFI or legacy mode. This will allow you to experiment with UEFI installations without potentially locking yourself out of your legacy boot setup. Major props to MSI for this. Finally, early adopters were reporting that enabling virtualisation on this board would cause instability and boot loops. On the latest BIOS, I'm having no issues with virtualisation whatsoever. Very stable performance with QEMU and KVM on Linux. In the future, I would like to upgrade to an APU so that I can use dGPU passthrough with a Windows virtual machine and eliminate the need to multi-boot for gaming. With IOMMU enabled, this should be achievable on this board. I think that covers everything. I bought this board expecting all sorts of exotic issues, but on the latest BIOS, everything works like a charm. This is my first experience with MSI as well, and I'm very happy thus far. If a weird setup like mine can work, then you can probably use this board without any issues.
Date published: 2017-11-02
Rated 5 out of 5 by from Great value product for a Ryzen 5 This product is a great option for a Ryzen 5. I am using a 1600 and it is super fast. Running ddr4 memory at 2999 and this will improve when further updates to the bios are released. Please read regarding the usual teething problems related to the ryzen architecture. Many issues that people have claimed to be with this board are in fact generic amd issues that can be solved through research.
Date published: 2017-06-04
Rated 5 out of 5 by from A solid, mid-priced board that just works. OK, lets get the negative thing out of the way first, it has red ambient lighting which I was unable to turn off. Not a major problem but, annoying none the less. And, as far as complaints go, that's it. This board works flawlessly. The BIOS is nice and easy to work through and, for the price, has enough of the right features if you are looking to build a nice little rig. I teamed it with the Ryzen R7 1800X, 32 Gig of 2400MHz RAM, a 512GB Samsung M.2 Nvme drive and a couple of SSD's I had knocking around from my previous build. The PC posted without an issue and everything worked as I would expect it to. Temperature reporting was a known issue when the AM4 boards first came along but this has been sorted and my CPU (which is under a bespoke water cooling system) idles at 28C and rarely hit 45C when under full load. All in all, a brilliant little board and well worth the money.
Date published: 2017-05-19
Rated 4 out of 5 by from Promising Early AM4 Baord It's still early days for the AM4 platform and as a consequence, there are still many bugs with the majority of the AM4 based motherboards, in particular the B350 chipset. Having said that though, there aren't any major problems with this board, and regular BIOS updates have improved its stability since launch. I did initially have a problem with the board not detecting my Ryzen 5 1600 with the original BIOS version, however Scan kindly updated the board for me with a Ryzen 7 chip free of charge (minus shipping charges). This may seem like a big issue, however having done some research this seems to be a caveat with many of the current B350 boards. MSI did tell me that the board supported R5 from the stock BIOS but I think there was also some memory compatibility issues with this first BIOS revision so I couldn't get my setup to work. Memory seems to be where this board has struggled the most, with all of the BIOS updates offering improved memory stability. Personally, I haven't been able to get a stable overclock on my 2400MHz Corsair LPX memory (currently running at 2133MHz) but it doesn't seem to provide much of a performance increase anyway. The board has plenty of features, for example intuitive fan and pump control from its array of PWM headers, and a RGB header. The VRMs seem pretty stable - I managed to overclock my R5 1600 to 3.80GHz at 1.365v with no overheating issues. I'm sure the board is capable of higher voltage but I was not so lucky with he silicon lottery and can't get my chip over 3.85GHz without instabilities, even at higher voltages and I dare not go above 1.4v. Overall, I would say this is the perfect board for the mid range user and provides many features which will only be improved with time as the AM4 platform matures.
Date published: 2017-05-19
Rated 3 out of 5 by from Average as of right now, but should improve. It appears that Ryzen/AM4 was a little rushed, and the products show it. This board recognises my 2666 DDR4 ram as 2133. Even with the latest BIOS of 1.2, it won't auto recognise anything higher. You can set it higher yourself, but then sometimes the PC doesn't boot. The boot time is quite bad too, you can see a black screen for up to 15-20 seconds before POST, it gets worse if you play around with the RAM speeds Apparently BIOS 1.3 addresses this, according to the forums, but it is in test and I don't recommend using it until it is actually released. Other than that, it seems like a good AM4 board, and is great if you don't want the bells and whistles (and cost) of the X370 boards I don't bother with the LED lights on the board, since it is under my desk, but they do look nice, and you can attach an LED strip to it. I don't use the MSI Gaming app or anything else that comes with it, and the MSI Live Update is mostly useless, so I just update manually from their website if I think I need to. BIOS is easy enough to use, the mouse works fine with it and it has Basic and Advanced modes. Updating the BIOS is easy too; whack the BIOS on a USB stick, reboot the PC, enter the BIOS, choose the OC mode, and it will reboot and let you select the BIOS from the USB to update. But keep an eye on their site and forums to see when it has a good BIOS that correctly detects RAM speeds and boots fast without a problem. If you don't mind being an early adopter, and running into a few teething problems, then this board will be fine. One thing to note. it has debug lights on the board, very handy if something is wrong and the board refuses to boot, like, with me, I forgot to connect the CPU power. There is a light that will always be lit on the board, called iGPU, which basically means you are using a CPU without integrated GPU (Ryzen)
Date published: 2017-04-07
Rated 5 out of 5 by from Great Value, Good Quality , Decent Motherboard For AM4 I bought this board as it was the only one in stock on launch day for Ryzen. I thought id keep it a few weeks till the great motherboards come in stock. 3 weeks later , im happy with it, no need to upgrade, its a cracking little board, decent overclocking and regular bios updates, 1.32 at the moment. Cant see me changing it for a good few years.
Date published: 2017-03-24
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Questions & Answers

Could anyone tell me what bios will be shipped with this?

Just so I don't have to end back to get it updated
Asked by: cudonk
Hello, This will ship with the default BIOS and will need updating to support any newer AMD CPU's. Regards,
Answered by: JackB
Date published: 2018-03-06

Does the current BIOS support Ryzen 2xxx series CPUs?

The previous question and answer are both 8 months old now. Have there been any changes to the default BIOS version? If not, can I request updating the BIOS before delivery?
Asked by: ndrw
Hello, We cannot provide details on the specific revision of the BIOS, it is possible some stock may have an updated BIOS but it's not something we would be able to guarantee. If you wish to request a BIOS update prior to purchase you can speak with our sales team to arrange this. Regards,
Answered by: JackB
Date published: 2018-11-20
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MSI AMD AM4 Ryzen B350 TOMAHAWK ATX Motherboard
MSI AMD AM4 Ryzen B350 TOMAHAWK ATX Motherboard