ASROCK ATX motherboard B850 PRO RS AM5 DSP0000042099

ASRock B850 Pro RS motherboard features
The ASRock B850 Pro RS is an ATX motherboard for AMD Ryzen™ processors with an AM5 socket, designed for building modern, high-performance systems. It combines PCIe 5.0 compatibility, up to 256 GB of DDR5 memory, 2.5 Gigabit networking and four M.2 slots, providing a well-balanced platform for gaming, productivity, content creation and advanced configurations.
AMD Ryzen™ processor and chipset compatibility B850
Equipped with the AMD B850 chipset, this motherboard is compatible with AMD Ryzen™ 9000, 8000 and 7000 Series processors. Its AM5 socket enables the creation of a modern platform with extensive expansion options, although the operation of certain PCIe and M.2 slots may vary depending on the installed processor.

Socket AMD AM5
Compatible with AMD Ryzen™ 9000, 8000 series and 7000
Chipset AMD B850
Compatibility with NVMe drives as boot disks

Stable power delivery for high-performance systems
Its 14+2+1-phase power design with 80 A Dr.MOS provides stable power delivery to the processor, SoC and other essential components. The enlarged heatsink cover helps control the temperature of the power delivery area under intensive loads.

14+2+1-phase power design
80 A Dr.MOS for VCore, SOC and MISC
Larger heatsink cover
24-pin ATX connector
2 high-density 8-pin 12 V power connectors
8-layer PCB

DDR5 memory up to 256 GB
The ASRock B850 Pro RS features four dual-channel DDR5 DIMM slots, with a maximum capacity of 256 GB. It supports both buffered and unbuffered ECC and non-ECC modules, as well as XMP and AMD EXPO profiles for easy configuration of high-performance memory.

DDR5 Dual Channel memory technology
4 slots DIMM DDR5
Frequencies of up to 8000+ MHz via overclocking
Maximum capacity of 256 GB
Compatible with buffered and unbuffered ECC and non-ECC memory
Support for Intel XMP and AMD EXPO profiles

PCIe 5.0 for graphics cards
The primary PCIe slot is designed to support PCIe 5.0 graphics cards with compatible processors. It also features 15 µ gold contacts in the primary slot to improve connection reliability.

1 PCIe slot 5.0 x16, PCIE1
Gen5 x16 operation with Ryzen™ 9000 series processors and 7000
Gen4 x8 operation with Ryzen™ 8000 Phoeni processors x 1
Gen4 x4 operation with Ryzen™ 8000 Phoeni processors x 2
1 PCIe 4.0 x16 slot, PCIE2, with electrical operation x4
15 µ gold contacts in the main PCIe slot
The PCIE2 slot is disabled when M2_3 is occupied

Four M.2 slots and SATA storage
The storage system offers four M.2 slots for NVMe drives, including a PCIe 5.0 x4 connection of up to 128 Gb/s. It also features four SATA3 connectors for SSDs and conventional hard drives.

1 Blazing M.2 M2_1, type 2280, PCIe Gen5 x4, up to 128 Gb/s
1 Hyper M.2 M2_2, type 2280, PCIe Gen4 x4, up to 64 Gb/s
1 Hyper M.2 M2_3 for 2230, 2242, 2260 and 2280 formats, PCIe Gen4 x4, up to 64 Gb/s
1 Ultra M.2 M2_4, type 2280, PCIe Gen3 x4, up to 32 Gb/s
2 SATA3 6 Gb/s connectors managed by the chipset
2 6 Gb/s SATA3 connectors via ASMedia controller ASM1061
Compatibility with NVMe drives as boot disks

The M2_1 slot takes priority for installing M.2 drives. It operates at Gen5 x4 with Ryzen™ 9000 and 7000 series processors, and at Gen4 x4 with Ryzen™ 8000 Phoenix 1 and Phoenix 2 processors.

M2_2 operates at Gen4 x4 with Ryzen™ 9000 processors and 7000
M2_2 operates at Gen4 x4 with Ryzen™ 8000 Phoeni x 1
M2_2 operates at Gen4 x2 with Ryzen™ 8000 Phoeni x 2
Using M2_3 disables the slot PCIE2
If SATA3_1 or SATA3_2 are occupied, M2_4 reduces its operation to Gen 3 x2

RAID configuration support
The motherboard supports RAID configurations for SATA and M.2 NVMe drives, making it easy to combine multiple drives to improve performance or data redundancy.

RAID 0 and RAID 1 for SATA devices
RAID 0, RAID 1 and RAID 10 for M.2 NVMe drives

2.5 Gigabit network connectivity
The Dragon RTL8125BG 2.5 Gigabit controller offers network speeds of up to 2500 Mb/s. Dragon software lets you manage priorities, control bandwidth and apply optimized settings for gaming, browsing and streaming.

10/100/1000/2500 Mb/s Ethernet network
Dragon controller RTL8125BG
Intelligent, automatic bandwidth control
Visual interface for viewing network usage
Optimized profiles for gaming, browsing and streaming
Custom priority control

HDMI and DisplayPort video outputs via USB-C
Processors with integrated AMD RDNA™ graphics can use the HDMI 2.1 and DisplayPort video outputs via USB-C. This allows high-resolution monitors to be connected without a dedicated graphics card, provided the installed CPU includes compatible graphics.

Integrated AMD RDNA™ graphics, depending on the processor
1 HDMI 2.1 TMDS/FRL output compatible with 8G
HDR support and HDCP 2.3
Maximum resolution via HDMI: 4K at 120 Hz
1 USB 3.2 Gen1 Type-C with DisplayPort Alternate Mode
Support for DisplayPort 1.4 HBR3 and DP 1.4a
Maximum resolution via USB-C: 4K at 60 Hz

7.1-channel HD audio with Nahimic
The Realtek ALC897 codec provides 7.1-channel HD audio for gaming, multimedia content and communications. Nahimic Audio technology complements the system with sound processing and optimization options.

7.1-channel HD audio
Realtek codec ALC897
Nahimic Audio technology
Rear connectors for line-in, front speaker and microphone
Internal audio connector for the front panel

Extensive USB connectivity
The ASRock B850 Pro RS offers a comprehensive selection of USB connections on the rear panel and via internal headers. The front USB 3.2 Gen2x2 Type-C connector, with speeds of up to 20 Gb/s, stands out and is designed for compatible cases and high-speed devices.

1 rear USB 3.2 Gen2 Type-C, up to 10 Gb/s
1 rear USB 3.2 Gen1 Type-C with DisplayPort Alternate Mode
4 rear USB 3.2 Gen1 Type-A ports
6 rear USB 2.0 ports
1 front USB 3.2 Gen2x2 Type-C header, up to 20 Gb/s
2 USB 3.2 Gen1 headers for up to 4 front ports
2 USB 2.0 headers for up to 4 front ports
ESD protection on all USB ports

Smart Fan cooling and control
The motherboard has seven connectors for fans and liquid cooling, all with Smart Fan control. The case, secondary CPU and AIO pump connectors automatically detect three- or four-pin fans.

2 4-pin processor fan connectors
4 4-pin case fan connectors
1 4-pin AIO pump connector
Smart Fan speed control
CPU_FAN1 supports up to 1 A and 12 W
CPU_FAN2, CHA_FAN1 to CHA_FAN4 and AIO_PUMP support up to 3 A and 36 W
Automatic detection of 3- and 4-pin fans on compatible connectors

RGB lighting and customization
The integrated connectors allow conventional and addressable RGB LED strips to be added. ASRock Polychrome SYNC lets you coordinate the lighting of compatible components.

1 12 V RGB LED header, up to 3 A
Maximum power of 36 W for RGB strips
3 5 V addressable LED headers, up to 3 A
Maximum power of 15 W for addressable LED strips
Compatible with ASRock Polychrome SYNC

UEFI BIOS and update tools
The 256 Mb AMI UEFI BIOS with graphical interface makes system configuration easy. The BIOS Flashback button allows you to update the BIOS conveniently, while ASRock Instant Flash and the automatic driver installer simplify setup.

256 Mb AMI UEFI BIOS with graphical support
ASRock EZ Mode
ASRock Full HD UEFI interface
BIOS Flashback button on the rear panel
ASRock Instant Flash
ASRock automatic driver installer
ASRock Post Status Checker for easier diagnostics

Integrated rear I/O panel
The integrated rear I/O panel makes installation easier and protects the port area. It includes video, network, audio and USB connectivity, as well as the BIOS Flashback button and antenna mounting points.

2 antenna mounting points
1 HDMI port
1 USB 3.2 Gen2 Type-C, 10 Gb/s
1 USB 3.2 Gen1 Type-C with DisplayPort 1.4a mode
4 USB 3.2 Gen1 Type-A ports
6 ports USB 2.0
1 2.5 Gigabit RJ-45 port
1 BIOS Flashback switch
HD audio connectors for line-in, front speaker and microphone

Additional internal connectors
The motherboard features internal connectors for security, the front panel, lighting and USB expansion, allowing it to be adapted to a wide variety of cases and configurations.

1 SPI TPM header
1 power LED and speaker header
1 front panel audio connector
2 headers USB 2.0
2 USB 3.2 Gen1 headers
1 front USB 3.2 Gen2x2 Type-C header
1 RGB LED header
3 addressable LED headers

Included software and ASRock utilities
ASRock tools let you monitor, configure and customise your system from Windows. Some utilities can be downloaded via ASRock Live Update & APP Shop.

ASRock Motherboard Utility, A-Tuning
ASRock Dragon 2.5G LAN Software
ASRock Polychrome Sync
ASRock Auto Driver Installer

ATX form factor, compatibility and accessories
With an ATX form factor of 30,5 x 24,4 cm, this motherboard is designed for cases compatible with ATX motherboards. It includes the accessories needed to get started with installation and is compatible with 64-bit Windows operating systems.

ATX form factor
Dimensions: 12.0 x 9.6 inches
Dimensions: 30,5 x 24,4 cm
Compatible with 64-bit Microsoft Windows® 10
Compatible with 64-bit Microsoft Windows® 11
Includes 2 SATA data cables
Includes 1 slot screw M.2
FCC and CE certifications
ErP/EuP ready with a compatible power supply
Volume (m ³): 0.0091