• Fan Xpert 2+: Flexible controls for ultimate cooling and silence.
  • Ultrafast connectivity: Supreme flexibility with USB 3.1 Gen 2 and native M.2
  • ASUS Aura Sync header: Onboard connector for RGB LED strips, easily synced with an ever-growing portfolio of Aura Sync-capable hardware
  • 5X Protection III: Multiple hardware safeguards for all-around system protection
Product Name:
PRIME B450M-A/CSM
Part Number:
90MB0YR0-M0AAYC
$77.99

Notify me
Out of stock
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 3rd/2nd/1st AMD Ryzen™/2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/Athlon™ with Radeon™ Vega Graphics Processors

Chipset

AMD B450

Memory

AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics/ Ryzen™ 1st Generation Processors
4 x DIMM, Max. 64GB, DDR4 3466(O.C.)/3200(O.C.)/3000(O.C.)/2800(O.C.)/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

Integrated Graphics in the AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics Processors
Multi-VGA output support : HDMI/DVI-D/D-Sub ports
- Supports HDMI 2.0b with maximum resolution of 4096  x 2160  @ 60  Hz
- Supports DVI-D with max. resolution 1920  x 1200  @ 60 Hz
- Supports D-sub with max. resolution 1920  x 1200  @ 60  Hz

Expansion Slots

AMD Ryzen™ 2nd Generation/ Ryzen™ 1st Generation Processors
1 x PCIe 3.0/2.0 x16 (x16 mode)
AMD Ryzen™ with Radeon™ Vega Graphics Processor
1 x PCIe 3.0/2.0 x16 (x8 mode) *1
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0/2.0 x16 (max at x4 mode)
AMD B450 chipset
2 x PCIe 2.0 x1

Storage

AMD B450 chipset :
4 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10
AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics/ Ryzen™ 1st Generation Processors :
2 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10
AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™ 1st Generation Processors :
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)*2
AMD Athlon™ with Radeon™ Vega Graphics Processors :
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA mode)*2

LAN

Realtek® RTL8111H, 1 x Gigabit LAN Controller(s)
ASUS LAN Guard

Audio

Realtek® ALC887 8-Channel High Definition Audio CODEC
Audio Feature :
- LED-illuminated design - Brighten up your build with the gorgeous illuminated audio trace path.
- Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference
- Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals
- Premium Japanese audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity
* Choose the chassis with HD audio module in front panel to support 8-channel audio output.

USB Ports

AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics/ Ryzen™ 1st Generation Processors :
4 x USB 3.1 Gen 1 port(s) (4 at back panel, blue)
AMD B450 chipset :
2 x USB 3.1 Gen 2 port(s) (2 at back panel, )
AMD B450 chipset :
2 x USB 3.1 Gen 1 port(s) (2 at mid-board)
AMD B450 chipset :
4 x USB 2.0/1.1 port(s) (4 at mid-board)

Special Features

ASUS 5X Protection III :
- ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-electricity discharges!
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
- ASUS DIGI+ VRM: Premium components provide better power efficiency
ASUS Exclusive Features :
- AI Suite 3
- Ai Charger
ASUS Quiet Thermal Solution :
- Stylish Fanless Design Heat-sink solution
- ASUS Fan Xpert 2+
ASUS EZ DIY :
- ASUS CrashFree BIOS 3 
- ASUS EZ Flash 3 
- ASUS UEFI BIOS EZ Mode
- Multi-language BIOS
ASUS Q-Design :
- ASUS Q-Slot
- ASUS Q-DIMM

Back I/O Ports

1 x PS/2 keyboard (purple)
1 x PS/2 mouse (green)
1 x DVI-D
1 x D-Sub
1 x HDMI
1 x LAN (RJ45) port(s)
2 x USB 3.1 Gen 2
4 x USB 3.1 Gen 1
3 x Audio jack(s)

Internal I/O Ports

1 x Aura RGB Strip Header
1 x USB 3.1 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.1 Gen 1 port(s) (19-pin)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
1 x TPM header
1 x COM port(s) connector(s)
6 x SATA 6Gb/s connector(s)
1 x CPU Fan connector(s) (1 x 4 -pin)
2 x Chassis Fan connector(s) (2 x 4 -pin)
1 x S/PDIF out header(s)
1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
1 x Front panel audio connector(s) (AAFP)
1 x System panel(s)
1 x Clear CMOS jumper(s)
1 x Speaker connector

Accessories

User´s manual
I/O Shield
2 x SATA 6Gb/s cable(s)
1 x M.2 Screw Package
1 x Supporting DVD

BIOS

128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, F3 My Favorite, Last Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial Presence Detect) memory information, F6 Qfan Control

Operating System

Windows® 10 64-bit
Windows® 7 64-bit *3

Form Factor

mATX Form Factor
9.6  inch x 9.5  inch ( 24.4  cm x 24  cm )

Note

1*Support NVMe PCIe RAID.
2*The M.2 Socket shares bandwidth with the SATA_5/6 ports, and therefore the SATA_5/6 ports cannot be used when an M.2 device is installed.
3*Install an AMD Ryzen™ 2nd Generatione or Ryzen™ 1st Generation Processors to support Windows 7 64-bit operating system.

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.