Best mid-ran­ge PCIe Gen4 motherboard for busi­ness and casu­al users!

9th of July 2020, Tai­pei, Tai­wan - BIOSTAR, a lea­ding brand of mother­boards, gra­phics cards, and sto­rage devices, today announ­ces the B550MH mother­board that runs the 3rd gen Ryzen processors.


Gea­red towards the busi­ness and casu­al users, the new BIOSTAR B550MH mother­board is desi­gned to be effi­ci­ent and reli­able with blee­ding edge tech­no­lo­gy built to be the best in the mar­ket with a new sty­lish PCB design.


The B550MH mother­board sup­ports up to 64Gb of RAM across 2DIMMs with the capa­bi­li­ty of reaching 4400+OC speeds and tech­no­lo­gies like PCIe 4.0 that sup­ports 16GT/s bit data trans­fer rates which is 2 times fas­ter than PCIe 3.0 with back­ward com­pa­ti­bi­li­ty, as well as PCIe M.2 4.0 which deli­vers lower laten­cy on a hig­her band­width of 64Gb/s which is 2x fas­ter than the old PCIe M.2 3.0 making the new BIOSTAR B550MH mother­board a gre­at choice for many applications.

The latest USB 3.2 Gen1 is also pre­sent in the B550MH mother­board deli­vering extra­or­di­na­ry per­for­mance boosts with data trans­fer speeds reaching up to 5Gbps and is back­ward com­pa­ti­ble with older devices.

Addi­tio­nal­ly, the BIOSTAR B550MH also has Super LAN Sur­ge Pro­tec­tion, pro­vi­ding LAN with more advan­ced anti­sta­tic pro­tec­tion capa­bi­li­ties by adding an inte­gra­ted chip to streng­t­hen electri­cal sta­bi­li­ty and pre­vent dama­ge from light­ning strikes and electri­cal sur­ges and HDMI out­put port which sup­ports up to 4K reso­lu­ti­on enab­ling new high-defi­ni­ti­on image dis­plays with four times the reso­lu­ti­on of Full HD, which express bright and high­ly detail­ed con­tent that fills the ent­i­re screen with life­li­ke images allowing users to enjoy high defi­ni­ti­on TV shows and movies online such as You­Tube or Net­flix with the HDMI output.

The B550MH also con­tains a ful­ly packed rear I/O panel con­tai­ning mul­ti­ple con­nec­ti­vi­ty opti­ons like 4 x USB 3.2 (Gen1) ports as well as 1 x PS/2 Key­board and a 1 x PS/2 mou­se port and a stan­dard D‑Sub out­put port com­ple­men­ta­ry to its alrea­dy excep­tio­nal HDMI port. Addi­tio­nal­ly, the B550MH also has 3 x audio ports that run on Real­tek ALC887 archi­tec­tu­re which deli­vers 7.1 Chan­nels, High Defi­ni­ti­on Audio, Real­tek GbE LAN port, as well as 2 x USB 2.0 ports for added connectivity. 

Over­all, the B550MH mother­board is a gre­at choice for that new AMD Ryzen build and BIOSTAR pro­mi­ses sup­port for any upco­m­ing Ryzen pro­ces­sors with time­ly BIOS updates so users can rest assu­red that the new B550MH mother­board will ser­ve them faith­ful­ly for a long time.

Key Fea­tures

PCIe 4.0

  • Sup­port a 16GT/s bit rate
  • Main­tain back­ward compatibility
  • It’s 2X band­width than PCIe 3.0
PCIe M.2 4.0
  • Deli­vers lower latency
  • Deli­vers the hig­hest band­width 64Gb/s
  • It’s 2 times fas­ter than PCIe M.2 3.0
Super LAN Sur­ge Protection
  • Streng­t­hens electri­cal stability
  • Makes inter­net more sta­ble at home
  • Pre­vents dama­ge from light­ning strikes and electri­cal surges
USB 3.2 Gen1
  • USB 3.2 Gen1 deli­vers com­pel­ling per­for­mance boosts and can be used to con­nect mul­ti­ple devices without worry­ing about com­pa­ti­bi­li­ty. It is capa­ble of data trans­fer speeds up to 5Gbps and back­ward com­pa­ti­ble with all exis­ting USB products.
  • SATA III 6Gbps pro­vi­des a hig­her band­width to retrie­ve and trans­fer HD media. With this super speed data trans­fer, SATA III allows an incredi­ble data boost which is 2x fas­ter than the SATA 3G.
HDMI 4K Connector
  • Expres­ses bright and high­ly detail­ed con­tent that fills the ent­i­re screen with life­li­ke images. Enjoy­ing TV shows and movies online such as You­Tube or Net­flix through HDMI connector.
DDR4 Memo­ry
  • DDR4 Memo­ry deli­vers hig­her per­for­mance, hig­her DIMM capa­ci­ties, impro­ved data inte­gri­ty and lower power consumption.

Spec table:

Chip­set AMD B550
CPU SUPPORT Sup­ports AMD 3rd Gen Ryzen (Matis­se) Pro­ces­sors / Future Ryzen Processors

Sup­port for future AMD Ryzen pro­ces­sors with BIOS update

* Plea­se refer to for CPU sup­port list.

MEMORY Sup­ports Dual Chan­nel DDR4 1866/2133/2400/2667/2933

Sup­ports Dual Chan­nel DDR4 3200(OC)/ 3600(OC)/ 4000(OC)/ 4400+(OC)

2 x DDR4 DIMM Memo­ry Slots, Max. Sup­ports up to 64 GB Memory

Each DIMM sup­ports non-ECC 8/ 16/ 32 GB DDR4 module

*DDR4- 2667 only for Ryzen CPU

*Plea­se refer to for Memo­ry sup­port list.


Sup­ports DX12

Sup­ports HDCP

STORAGE 4 x SATA III Con­nec­tors (6Gb/s): Sup­ports AHCI & RAID 0, 1, 10

1 x M.2 (M Key) Socket:

Sup­ports M.2 Type 2242/ 2260/ 2280 SSD module

Sup­ports PCI‑E 4.0 x4 (64Gb/s)/ 3.0 x4 (32Gb/s)- NVMe / AHCI SSD

Sup­ports SATA III (6.0Gb/s) SSD

*M.2 (M Key) Socket (M2_PCIE-SATA1):

The band­width is depen­dent on the CPU

Sup­ports PCI‑E 4.0 x4 (64Gb/s) speed, which depends only on Ryzen 3rd Gen Matisse.

LAN Real­tek RTL8111H

10/ 100/ 1000 Mb/s auto nego­tia­ti­on, Half / Full duplex capability

Sup­ports Super LAN Sur­ge Protection


7.1 Chan­nels, High Defi­ni­ti­on Audio, Hi-Fi (Front)

USB 8 x USB 3.2 (Gen1) ports (4 on rear I/Os and 4 via inter­nal headers)

6 x USB 2.0 ports (2 on rear I/Os and 4 via inter­nal headers)

EXPANSION SLOT 1 x PCIe 4.0/ 3.0 x16 Slot:

Sup­ports PCIe 4.0 x16 mode with AMD Ryzen pro­ces­sors. (Matis­se only)

Sup­ports PCIe 3.0 x16 mode AMD Ryzen with Rade­on Vega Gra­phics processors.

2 x PCIe 3.0 x1 Slots

*Accord­ing to dif­fe­rent CPUs will have dif­fe­rent speeds.

REAR I/O 1 x PS/2 Keyboard

1 x PS/2 Mouse

1 x HDMI Port

1 x VGA Port

1 x LAN port

4 x USB 3.2 (Gen1) Ports

2 x USB 2.0 Ports

3 x Audio Jack

INTERNAL I/O 4 x SATA III (6.0Gb/s) Connectors

2 x USB 2.0 Hea­ders (each hea­der sup­ports 2 USB 2.0 ports)

2 x USB 3.2 (Gen1) Hea­ders (each hea­der sup­ports 2 USB 3.2 (Gen1) ports)

1 x 8‑Pin Power Connector

1 x 24-Pin Power Connector

1 x CPU Fan Connector

1 x Sys­tem Fan Connector

1 x Front Panel Header

1 x Front Audio Header

1 x Clear CMOS Header

1 x Inter­nal Ste­reo Spea­ker Header

1 x COM Port Header

H/W MONITORING CPU / Sys­tem Tem­pe­ra­tu­re Monitoring

CPU / Sys­tem Fan Monitoring

Smart / Manu­al CPU Fan Control

Sys­tem Vol­ta­ge Monitoring

DIMENSION Micro-ATX Form Fac­tor: 24.4 cm x 20.8 cm
OS SUPPORT Win­dows 10 (64bit)

*BIOSTAR reser­ves the right to add or remo­ve sup­port for any OS with or without notice.


1 x I/O Shield

1 x Quick Guide

1 x DVD Driver

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BIOSTAR, is a brand dedi­ca­ted to the pro­duc­tion of mother­boards, gaming mother­boards, SSD, gra­phics cards, indus­tri­al com­pu­ting sys­tems, IoT, cryp­to mining equip­ment, and health­ca­re solu­ti­ons. Sin­ce its estab­lish­ment in 1986, BIOSTAR has beco­me a major mother­board sup­plier in the IT indus­try. In order to pur­sue the best qua­li­ty and aes­the­tic design, BIOSTAR has inves­ted hea­vi­ly in ID design, equip­ment, glo­bal mar­ke­ting rese­arch as well as R&D. With a con­stant empha­sis on qua­li­ty, BIOSTAR always seeks to impro­ve bey­ond bet­ter and race to the future.

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