Description
B850 Pro-A
Pro-A series is designed for enhanced stability, durability, and efficiency, it offers reliable performance, user-friendly features and a streamlined aesthetic, making it ideal for daily computing needs.
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- Overview
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Optimized for stability, durability, and efficiency. It combines reliable performance, user-friendly features and streamlined style for daily computing tasks.
Performance
Optimized VRM Design
14+2+1 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
Dr. MOS
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance.
8 Layer PCB
The 8 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus, it’s able to support the latest memory modules with most extreme memory performance!
DDR5 XMP & EXPO Support
Derived from the “built for stable and reliable” designing concept, ASRock does not compromise on any details. This motherboard is built with high quality materials, enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable, satisfying and absolutely no sweat at all.
* There are certain risks involved with memory overclocking and may affect your system’s stability. Please realize that overclocking should be done at your own risk and expense. EXPO/XMP profile support may vary by different system configuration, memory modules and motherboard models. Please refer to Memory QVL for the completed support list.
High Speed M.2 Solution
PCIe Gen5 Blazing M.2
The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation, with a breathtaking 128Gb/s transfer speed, it is ready to unleash the full potential of future ultrafast SSDs.
Cooling
Intelligent Cooling Design
Aluminum Heatsink
The first thing that catches the eye is the optimized Aluminum Heatsink Design. Heatsinks are crucial for efficient heat dissipation, especially during heavy workloads like gaming or productivity tasks. Motherboard that built with heatsinks can effectively manage thermal performance, hence ensure system stability and durability effortlessly.
Connectivity
Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you’ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.
Abundant USB
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation, providing a blazing fast data transfer interface with reversible USB Type-C design that fits the connector either way.
Stylish Design
POLYCHROME RGB
This motherboard features onboard RGB headers and addressable RGB headers that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.
*The addressable RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V), a max of 80 LEDs and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.
SignalRGB
SignalRGB unifies your RGB devices, offering seamless customization, game-reactive effects, macro automation, and system monitoring. The official partnership empowers ASRock motherboards with advanced lighting control, enhances compatibility with a diverse range of RGB devices, and provides greater customization flexibility.
DIY Friendly
Reinforced Steel Slot[PCIe 5.0 Version]
The reinforced steel slot is capable of supporting PCI Express 5.0 standard. The various benefits include:
✔ Extra anchor points
✔ Stronger latch
✔ Ensure signal stability
✔ Make sure heavy graphics cards to be well-installed.
✔ Extra anchor points
✔ Stronger latch
✔ Ensure signal stability
✔ Make sure heavy graphics cards to be well-installed.
![Reinforced Steel Slot [PCIe 5.0 Version]](https://www.asrock.com/mb/features/Reinforced%20Steel%20Slot5-Refresh.jpg)
EZ Setting
No need to worry about lack of disk drive! Asrock preinstall LAN driver to ensure that you are able to install all drivers needed in an easier way than using SCD.
step1 : Install Auto Driver Installer
step1 : Install Auto Driver Installer
step2 : Update drivers needed
step3 : Done!
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B850 Pro-A
- Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
- 14+2+1 Phase Power Design, 80A Dr.MOS for VCore+SOC+MISC
- 4 x DDR5 DIMMs
- Supports Dual Channel, up to 8000+ (OC)
- 1 PCIe 5.0 x16, 1 PCIe 4.0 x16, 1 M.2 Key E for WiFi
- Graphics Output Options: 1 HDMI, 1 USB Type-C (DP-alt)
- Realtek ALC897 7.1 CH HD Audio Codec
- 1 Blazing M.2 (PCIe Gen5x4)
2 Hyper M.2 (PCIe Gen4x4)
1 Ultra M.2 (PCIe Gen3x4)
4 SATA3 - 1 USB 3.2 Gen2x2 Type-C (Front)
1 USB 3.2 Gen2 Type-C (Rear)
1 USB 3.2 Gen1 Type-C (Rear)
6 USB 3.2 Gen1 (4 Rear, 2 Front)
9 USB 2.0 (6 Rear, 3 Front) - Realtek 2.5G LAN
- Supports BIOS Flashback
This model may not be sold worldwide. Please contact your local dealer for the availability of this model in your region.
The terms HDMI and HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.
The specification is subject to change without notice in advance. The brand and product names are trademarks of their respective companies. Any configuration other than original product specification is not guaranteed.
The above user interface picture is a sample for reference. The actual user interface may vary with the updated software version.
Additional information
| Weight | 2 kg |
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Specification
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Unique FeatureSuperb Productivity
– PCIe Gen5 (Graphics, M.2)
– Dual Channel DDR5
Rock-Solid Durability
– 14+2+1 Power Phase, 80A Dr.MOS for VCore+SOC+MISC
Ultrafast Connectivity
– 2.5G LAN
EZ Update
– BIOS Flashback Button
– ASRock Auto Driver Installer
EZ Troubleshooter
– ASRock Post Status Checker -
CPU– Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors** The availability of expansion slots may vary by CPU. Please refer to PCIe/M.2 Bandwidth Table for details.
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Chipset– AMD B850
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Memory– Dual Channel DDR5 Memory Technology
– 4 x DDR5 DIMM Slots
– Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC)
– Max. capacity of system memory: 256GB
– Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules -
BIOS– 256Mb AMI UEFI Legal BIOS with GUI support
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GraphicsIntegrated AMD RDNA™ graphics (Actual support may vary by CPU)
– 1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3 and max. resolution up to 4K 120Hz
– 1 x USB 3.2 Gen1 Type-C, supports DP 1.4 HBR3 and max. resolution up to 4K 60Hz (DP-alt mode supports DP1.4a) -
Audio– 7.1 CH HD Audio (Realtek ALC897 Audio Codec)
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LAN– 2.5 Gigabit LAN 10/100/1000/2500 Mb/s
– Dragon RTL8125BG
– Supports Dragon 2.5G LAN Software
– Smart Auto Adjust Bandwidth Control
– Visual User Friendly UI
– Visual Network Usage Statistics
– Optimized Default Setting for Game, Browser, and Streaming Modes
– User Customized Priority Control -
SlotsCPU:
– 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
Chipset:
– 1 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode*
– 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
– 15μ Gold Contact in VGA PCIe Slot (PCIE1)* PCIE1 will run at Gen5x16 with 9000 and 7000 series processors, Gen4x8 with 8000 (Phoenix 1) series processors and Gen4x4 with 8000 (Phoenix 2) series processors.
If M2_3 is occupied, PCIE2 will be disabled.
Supports NVMe SSD as boot disks -
StorageCPU:
– 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode*
– 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode*
Chipset:
– 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2230/2242/2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
– 1 x Ultra M.2 Socket (M2_4, Key M), supports type 2280 PCIe Gen3x4 (32 Gb/s) mode*
– 2 x SATA3 6.0 Gb/s Connectors
ASMedia ASM1061:
– 2 x SATA3 6.0 Gb/s Connectors* Supports NVMe SSD as boot disks
M2_1 is the first priority for M.2 installation.
M2_1 will run at Gen5x4 with 9000 and 7000 series processors and Gen4x4 with 8000 (Phoenix 1 and Phoenix 2) series processors.
M2_2 will run at Gen4x4 with 9000 and 7000 series processors, Gen4x4 with 8000 (Phoenix 1) series processors and Gen4x2 with 8000 (Phoenix 2) series processors.
If M2_3 is occupied, PCIE2 will be disabled.
If SATA3_1 or SATA3_2 is occupied, M2_4 will downgrade to Gen3x2 mode. -
RAID– Supports RAID 0 and RAID 1 for SATA storage devices
– Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices -
USBCPU:
– 1 x USB 3.2 Gen2 Type-C (Rear)
– 1 x USB 3.2 Gen1 Type-C (Rear)
– 2 x USB 3.2 Gen1 Type-A (Rear (USB32_1 and USB32_2)) Chipset:
– 1 x USB 3.2 Gen2x2 Type-C (Front)
– 4 x USB 3.2 Gen1 Type-A (2 Rear (USB32_3 and USB32_4), 2 Front)
– 9 x USB 2.0 (6 Rear, 3 Front)* All USB ports support ESD Protection -
Connector– 1 x SPI TPM Header
– 1 x Power LED and Speaker Header
– 1 x RGB LED Header*
– 3 x Addressable LED Headers**
– 2 x CPU Fan Connectors (4-pin) (Smart Fan Speed Control)***
– 4 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)***
– 1 x AIO Pump Fan Connector (4-pin) (Smart Fan Speed Control)***
– 1 x 24 pin ATX Power Connector
– 2 x 8 pin 12V Power Connectors (Hi-Density Power Connector)
– 1 x Front Panel Audio Connector
– 2 x USB 2.0 Headers (Support 3 USB 2.0 ports)
– 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
– 1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)* Supports in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip
*** CPU_FAN1 supports the fan power up to 1A (12W).
CPU_FAN2, CHA_FAN1~4 and AIO_PUMP support the fan power up to 3A (36W).
CPU_FAN2, CHA_FAN1~4 and AIO_PUMP can auto detect if 3-pin or 4-pin fan is in use. -
Rear Panel I/O– 2 x Antenna Mounting Points
– 1 x HDMI Port
– 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
– 1 x USB 3.2 Gen1 Type-C Port (DP-alt mode supports DP1.4a)
– 4 x USB 3.2 Gen1 Type-A Ports
– 6 x USB 2.0 Ports
– 1 x RJ-45 LAN Port
– 1 x BIOS Flashback Button
– HD Audio Jacks: Line in / Front Speaker / Microphone -
Software and UEFISoftware
– ASRock Motherboard Utility (A-Tuning)
– ASRock Dragon 2.5G LAN Software
– ASRock Polychrome SYNC*
UEFI
– ASRock EZ Mode
– ASRock Full HD UEFI
– ASRock Auto Driver Installer
– ASRock Instant Flash*These utilities can be downloaded from ASRock Live Update & APP Shop. -
Accessories– 1 x I/O Shield
– 2 x SATA Data Cables
– 1 x Screw for M.2 Socket -
Form Factor– ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
– 8 Layer PCB -
OS– Microsoft Windows® 10 64-bit / 11 64-bit
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Certifications– FCC, CE
– ErP/EuP ready (ErP/EuP ready power supply is required)
The terms HDMI and HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.
The specification is subject to change without notice in advance. The brand and product names are trademarks of their respective companies. Any configuration other than original product specification is not guaranteed.
The above user interface picture is a sample for reference. The actual user interface may vary with the updated software version.
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