• AMD AM4 socket: Ready for Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors
  • Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-C®
  • ASUS-exclusive self-recovering BIOS technology for automatic system BIOS recovery from a verified backup
  • Innovative moisture-resistant coating to protect the motherboard from harsh environments
Product Name:
PRO B550M-C/CSM
Part Number:
90MB15Q0-M0AAYC
$129.99

Delivery Most orders ship out within 24 hours
Pickup A click away from your pick
Free Shipping
Free shipping For orders over $29.99
Online customer service
Get help buying You can email, chat, or call us any time
Safe and Secure Payment
Safe and secure payment Your data is encrypted for your protection
3 years manufacturer warranty
Warranty 3 year manufacturer warranty
Free Shipping
Free shipping For orders over $29.99
Online customer service
Get help buying You can email, chat, or call us any time
Safe and Secure Payment
Safe and secure payment Your data is encrypted for your protection
3 years manufacturer warranty
Warranty 3 year manufacturer warranty

Tech Specs

CPU

AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors *
* Refer to www.asus.com for CPU support list

Chipset

AMD B550

Memory

AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
4 x DIMM, Max. 128GB, DDR4 4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory *
AMD Ryzen™ 4000 G-Series Desktop Processors
4 x DIMM, Max. 128GB, DDR4 4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory *
Dual Channel Memory Architecture
ECC Memory (ECC mode) support varies by CPU.
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).

Graphic

2  x DisplayPort
1  x HDMI 2.1(4K@60HZ)
*Graphics specifications may vary between CPU types.

Expansion Slots

AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
1 x PCIe 4.0 x16 (x16 mode) *
AMD Ryzen™ 4000 G-Series Desktop Processors
1 x PCIe 3.0 x16 (x16 mode)
AMD B550 Chipset
1 x PCIe 3.0 x4 *1
1 x PCI
* Support PCIe bifurcation for RAID on CPU function.

Storage

Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors :
1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support
AMD RyzenTM 4000 G-Series Processors :
1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support
AMD B550 Chipset :
1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support
4 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10

LAN

Realtek RTL8111H 1Gb Ethernet

Audio

Realtek ALC887/897 7.1 Surround Sound High Definition Audio CODEC *
- Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback
* Choose the chassis with HD audio module in front panel to support 8-channel audio output.

USB Ports

Rear USB Port ( Total 6  )
2 x USB 3.2 Gen 2 port(s)(1 x Type-A +1 x USB Type-C®)
2 x USB 3.2 Gen 1 port(s)(2 x Type-A)
2 x USB 2.0 port(s)(2 x Type-A)
Front USB Port ( Total 7  )
4 x USB 3.2 Gen 1 port(s)(4 x Type-A)
3 x USB 2.0 port(s)

Software Features

ASUS Exclusive Software
IT Management software supported
- ASUS Control Center Express(ACCE)

ASUS Special Features

ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum heatsink design
ASUS EZ DIY
- Box Headers
Bespoke Motherboard Design & Business Focused Features
- ASUS Self Recovering BIOS
- ASUS Event Log
- ASUS Commercial BIOS kit
- Anti-Moisture
- 24/7 Reliability
- Overcurrent Protection
TPM2.0 IC Onboard

Back I/O Ports

1 x Realtek® RTL8111H
1 x PS/2 keyboard (purple)
1 x PS/2 mouse (green)
2 x DisplayPort
1 x HDMI
2 x USB 3.2 Gen 2 (1 x Type-A+1 x USB Type-C®)
2 x USB 3.2 Gen 1 Type-A
2 x USB 2.0
3 x Audio jack(s)

Internal I/O Ports

1 x CPU Fan connector(s)
2 x Chassis Fan connector(s)
2 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 4 USB 3.2 Gen 1 port(s)
2 x USB 2.0 connector(s) support(s) additional 3 USB 2.0 port(s)
2 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)
1 x M.2 with E key for Wi-Fi module
1 x LPT header
4 x SATA 6Gb/s connector(s)
1 x Thunderbolt header(s)
1 x 24-pin EATX Power connector(s)
1 x 8-pin EATX 12V Power connectors
1 x Front panel audio connector(s) (AAFP)
1 x SMBus header(s)
1 x System panel(s)
1 x Clear CMOS jumper(s)
1 x COM port header
1 x Chassis intrusion header
1 x LPC Debug header
1 x Speaker connector

Accessories

1 x ACC Express Activation Key Card
I/O Shield
2 x SATA 6Gb/s cable(s)
1 x Supporting DVD
User manual
3 x M.2 SSD screw package(s)
2 x M.2 SSD Hex screw packages

BIOS

256 Mb Flash ROM, UEFI AMI BIOS

Manageability

WOL by PXE

Operating System

Windows® 10 64-bit

Form Factor

mATX Form Factor
9.6  inch x 9.6  inch ( 24.4  cm x 24.4  cm )

Note

*1 The PCIe x4 slot runs x2 mode when the PCI slot is occupied.

Shopping FAQ

Order

What is the order processing time?
            Orders are processed Monday through Friday during normal business hours and will not be processed during weekends and/or holidays. Most orders are processed within two business days.

How do I make changes to my order?
            We cannot make changes to an existing order.

What if I'm having trouble placing an order?
            Please call us toll-free at 855-755-2787, Monday ~ Friday, 6 a.m.-6 p.m. PST, or email us at onlineservice@asus.com.

Disclaimer
            Please note that order confirmations will only come from onlineservice@asus.com. If you receive an order confirmation from another email address, please contact us directly by calling toll-free at 855-755-2787, Monday ~ Friday, 8 a.m.-6 p.m. PST, or emailing us at onlineservice@asus.com.

Payment

What payment methods can I use to pay my order?
            We accept most credit and debit cards. We also offer financing through our partner, Affirm.

When does my credit card get charged?
            To ensure you are totally satisfied with your purchase, Asus will not charge your credit card until your order has been shipped. At the time you place your order, we'll pre-authorize your card for the total amount plus all applicable taxes and shipping charges.

Sales Tax Policy
            Even if we do not collect sales tax from you, you may owe sales tax on your purchase. For more information, please visit your state's department of revenue website.

Shipping and Delivery

Free ground shipping on all orders over $29.99.

Ground: Should arrive 2 to 10 business days after shipment
2nd Day: Should arrive 2 business days after shipment
Overnight: Should arrive 1 business day after shipment
*Ground shipping is only offered to the 48 continental states, express shipping will have to be paid by customer for HI or AK

Do you offer a weekend delivery service option?
            Unfortunately, weekend delivery is not an available shipping option.

Can I have my order redirected to another address?
            If there was an error on your address when placing your order, please feel free to reach out to us so we can do our best to fix it. However, we are unfortunately not able to update all shipments. Our carrier will attempt to deliver three times before re-routing shipments back to us.

Do you ship internationally?
            No, we do not currently ship internationally.

Why do you require a signature to receive a package?
            Our shipments contain valuable equipment and we like to ensure that our customers receive their products safely. If you will not be at the shipping address to accept delivery of your product, consider shipping the item to an address where you or someone you trust will be available to sign for your package. We highly encourage customers to ship to their billing address to facilitate a faster turnaround time. To ensure our customers receive their package, signatures are required on most orders.

What happens if I am not available to sign for my order?
            Most of our carriers make three attempts to deliver a package. After three delivery attempts, our couriers will return your order to us.

What should I do if my shipment is delayed, lost, or has an issue?
            Please notify us within 2 business days at toll-free at 855-755-2787, Monday ~ Friday, 6 a.m.-6 p.m. PST, or via email at onlineservice@asus.com.

 

Refunds and Returns

Return Policy
            Our return policy allows for returns within 30-calendar days of your order being placed on eligible items*. Please note that you may be charged a 15% Restocking Fee for non-defective returned items, or if the product is in opened or missing accessories. Prices are subjected to change without prior notice. Any returns after 30-calender days are not eligible for refund.
* Select items are not eligible for return
* Warranty cards with the code scratched are not eligible for return
* Warranty card returns must be initiated within 14 days for purchase
* Software, driver disc, or damaged items are not eligible for return

How do I return a product?
            To return a product you will need to request RMA (return merchandise authorization) number by
1. login to my account -> go into order detail -> select the item you are returning and system will generate return instruction. After a short period of time, you can print your return label from your returns.
or
2. Call ASUS Customer service at 1-855-755-2787 to submit the return request.
ASUS recommends customer to return order with tracking and signature service. Please note that order can only request an RMA number within 30 days from the order date.


Do I have to pay for return shipping?
            If any conditions below are met within 30-calendar days from the purchased date we will provide a pre-paid return label.
• Defective
• Damaged due to shipping
• Incorrect product
• Missing accessories
For any other condition you will have to pay for the return shipping.