Best mid-ran짯ge PCIe Gen4 motherboard for busi짯ness and casu짯al users!

9th of July 2020, Tai짯pei, Tai짯wan - BIOSTAR, a lea짯ding brand of mother짯boards, gra짯phics cards, and sto짯rage devices, today announ짯ces the B550MH mother짯board that runs the 3rd gen Ryzen processors.


Geared towards the busi짯ness and casu짯al users, the new BIOSTAR B550MH mother짯board is desi짯gned to be effi짯ci짯ent and relia짯ble with blee짯ding edge tech짯no짯lo짯gy built to be the best in the mar짯ket with a new sty짯lish PCB design.


The B550MH mother짯board sup짯ports up to 64Gb of RAM across 2DIMMs with the capa짯bi짯li짯ty of rea짯ching 4400+OC speeds and tech짯no짯lo짯gies like PCIe 4.0 that sup짯ports 16GT/s bit data trans짯fer rates which is 2 times fas짯ter than PCIe 3.0 with back짯ward com짯pa짯ti짯bi짯li짯ty, as well as PCIe M.2 4.0 which deli짯vers lower laten짯cy on a hig짯her band짯width of 64Gb/s which is 2x fas짯ter than the old PCIe M.2 3.0 making the new BIOSTAR B550MH mother짯board a gre짯at choice for many applications.

The latest USB 3.2 Gen1 is also pre짯sent in the B550MH mother짯board deli짯ve짯ring extra짯or짯di짯na짯ry per짯for짯mance boosts with data trans짯fer speeds rea짯ching up to 5Gbps and is back짯ward com짯pa짯ti짯ble with older devices.

Addi짯tio짯nal짯ly, the BIOSTAR B550MH also has Super LAN Sur짯ge Pro짯tec짯tion, pro짯vi짯ding LAN with more advan짯ced anti짯sta짯tic pro짯tec짯tion capa짯bi짯li짯ties by adding an inte짯gra짯ted chip to streng짯then elec짯tri짯cal sta짯bi짯li짯ty and pre짯vent dama짯ge from light짯ning strikes and elec짯tri짯cal sur짯ges and HDMI out짯put port which sup짯ports up to 4K reso짯lu짯ti짯on enab짯ling new high-defi짯ni짯ti짯on image dis짯plays with four times the reso짯lu짯ti짯on of Full HD, which express bright and high짯ly detail짯ed con짯tent that fills the enti짯re screen with life짯li짯ke images allo짯wing users to enjoy high defi짯ni짯ti짯on TV shows and movies online such as You짯Tube or Net짯flix with the HDMI output.

The B550MH also con짯ta짯ins a ful짯ly packed rear I/O panel con짯tai짯ning mul짯ti짯ple con짯nec짯ti짯vi짯ty opti짯ons like 4 x USB 3.2 (Gen1) ports as well as 1 x PS/2 Key짯board and a 1 x PS/2 mou짯se port and a stan짯dard D멣ub out짯put port com짯ple짯men짯ta짯ry to its alre짯a짯dy excep짯tio짯nal HDMI port. Addi짯tio짯nal짯ly, the B550MH also has 3 x audio ports that run on Real짯tek ALC887 archi짯tec짯tu짯re which deli짯vers 7.1 Chan짯nels, High Defi짯ni짯ti짯on Audio, Real짯tek GbE LAN port, as well as 2 x USB 2.0 ports for added connectivity. 

Over짯all, the B550MH mother짯board is a gre짯at choice for that new AMD Ryzen build and BIOSTAR pro짯mi짯ses sup짯port for any upco짯ming Ryzen pro짯ces짯sors with time짯ly BIOS updates so users can rest assu짯red that the new B550MH mother짯board will ser짯ve them faithful짯ly for a long time.

Key Fea짯tures

PCIe 4.0

  • Sup짯port a 16GT/s bit rate
  • Main짯tain back짯ward compatibility
  • It셲 2X band짯width than PCIe 3.0
PCIe M.2 4.0
  • Deli짯vers lower latency
  • Deli짯vers the hig짯hest band짯width 64Gb/s
  • It셲 2 times fas짯ter than PCIe M.2 3.0
Super LAN Sur짯ge Protection
  • Streng짯thens elec짯tri짯cal stability
  • Makes inter짯net more sta짯ble at home
  • Pre짯vents dama짯ge from light짯ning strikes and elec짯tri짯cal surges
USB 3.2 Gen1
  • USB 3.2 Gen1 deli짯vers com짯pel짯ling per짯for짯mance boosts and can be used to con짯nect mul짯ti짯ple devices wit짯hout worry짯ing about com짯pa짯ti짯bi짯li짯ty. It is capa짯ble of data trans짯fer speeds up to 5Gbps and back짯ward com짯pa짯ti짯ble with all exis짯ting USB products.
  • SATA III 6Gbps pro짯vi짯des a hig짯her band짯width to retrie짯ve and trans짯fer HD media. With this super speed data trans짯fer, SATA III allows an incre짯di짯ble data boost which is 2x fas짯ter than the SATA 3G.
HDMI 4K Connector
  • Expres짯ses bright and high짯ly detail짯ed con짯tent that fills the enti짯re screen with life짯li짯ke images. Enjoy짯ing TV shows and movies online such as You짯Tube or Net짯flix through HDMI connector.
DDR4 Memo짯ry
  • DDR4 Memo짯ry deli짯vers hig짯her per짯for짯mance, hig짯her DIMM capa짯ci짯ties, impro짯ved data inte짯gri짯ty and lower power consumption.

Spec table:

Chip짯set AMD B550
CPU SUPPORT Sup짯ports AMD 3rd Gen Ryzen (Matis짯se) Pro짯ces짯sors / Future Ryzen Processors

Sup짯port for future AMD Ryzen pro짯ces짯sors with BIOS update

* Plea짯se refer to for CPU sup짯port list.

MEMORY Sup짯ports Dual Chan짯nel DDR4 1866/2133/2400/2667/2933

Sup짯ports Dual Chan짯nel DDR4 3200(OC)/ 3600(OC)/ 4000(OC)/ 4400+(OC)

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

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

*DDR4- 2667 only for Ryzen CPU

*Plea짯se refer to for Memo짯ry sup짯port list.


Sup짯ports DX12

Sup짯ports HDCP

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

1 x M.2 (M Key) Socket:

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

Sup짯ports PCI멐 4.0 x4 (64Gb/s)/ 3.0 x4 (32Gb/s)- NVMe / AHCI SSD

Sup짯ports SATA III (6.0Gb/s) SSD

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

The band짯width is depen짯dent on the CPU

Sup짯ports PCI멐 4.0 x4 (64Gb/s) speed, which depends only on Ryzen 3rd Gen Matisse.

LAN Real짯tek RTL8111H

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

Sup짯ports Super LAN Sur짯ge Protection


7.1 Chan짯nels, High Defi짯ni짯ti짯on Audio, Hi-Fi (Front)

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

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

EXPANSION SLOT 1 x PCIe 4.0/ 3.0 x16 Slot:

Sup짯ports PCIe 4.0 x16 mode with AMD Ryzen pro짯ces짯sors. (Matis짯se only)

Sup짯ports PCIe 3.0 x16 mode AMD Ryzen with Rade짯on Vega Gra짯phics processors.

2 x PCIe 3.0 x1 Slots

*Accor짯ding to dif짯fe짯rent CPUs will have dif짯fe짯rent 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 Hea짯ders (each hea짯der sup짯ports 2 USB 2.0 ports)

2 x USB 3.2 (Gen1) Hea짯ders (each hea짯der sup짯ports 2 USB 3.2 (Gen1) ports)

1 x 8멠in Power Connector

1 x 24-Pin Power Connector

1 x CPU Fan Connector

1 x Sys짯tem Fan Connector

1 x Front Panel Header

1 x Front Audio Header

1 x Clear CMOS Header

1 x Inter짯nal Ste짯reo Spea짯k짯er Header

1 x COM Port Header

H/W MONITORING CPU / Sys짯tem Tem짯pe짯ra짯tu짯re Monitoring

CPU / Sys짯tem Fan Monitoring

Smart / Manu짯al CPU Fan Control

Sys짯tem Vol짯ta짯ge Monitoring

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

*BIOSTAR reser짯ves the right to add or remo짯ve sup짯port for any OS with or wit짯hout notice.


1 x I/O Shield

1 x Quick Guide

1 x DVD Driver

Learn more about:



Con짯nect with Us









BIOSTAR, is a brand dedi짯ca짯ted to the pro짯duc짯tion of mother짯boards, gam짯ing mother짯boards, SSD, gra짯phics cards, indus짯tri짯al com짯pu짯ting sys짯tems, IoT, cryp짯to mining equip짯ment, and health짯ca짯re solu짯ti짯ons. Sin짯ce its estab짯lish짯ment in 1986, BIOSTAR has beco짯me a major mother짯board sup짯pli짯er in the IT indus짯try. In order to pur짯sue the best qua짯li짯ty and aes짯the짯tic design, BIOSTAR has inves짯ted hea짯vi짯ly in ID design, equip짯ment, glo짯bal mar짯ke짯ting rese짯arch as well as R&D. With a con짯stant empha짯sis on qua짯li짯ty, BIOSTAR always seeks to impro짯ve bey짯ond bet짯ter and race to the future.

More Pro짯duct Infor짯ma짯ti짯on:Best Intel and AMD mother짯boards for extre짯me gam짯ing-BIO짯STARCryp짯to짯cur짯ren짯cy mining mother짯board for Bitcoin