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Rectangular ATX motherboard, dark PCB with silver heatsinks and black slots

ASRock

ASRock B850 Pro RS AMD motherboard

SKU CH-0PMF-7QTF7 MPN B850 Pro RS

AM5 ATX board with 14+2+1 power phases, DDR5 to 8000, PCIe 5.0 x16, one Gen5 M.2, two Gen4 M.2, four SATA, Dragon RTL8125BG LAN and 7.1 audio

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8000+(OC)
  • Maximum Memory Supported256GB

Option B850 Pro RS

Les versions barrées existent, mais ne sont pas disponibles ici.

  • Supports Ryzen 7000, 8000 and 9000 Series CPUs via AM5 socket
  • 14+2+1 phase power design with 80A Dr.MOS for stable CPU delivery
  • Four DDR5 slots up to 8000 MT/s (OC) with 256 GB maximum capacity
  • PCIe 5.0 x16 graphics slot plus one Blazing M.2 at 128 Gb/s
  • Realtek ALC897 7.1-channel audio with Nahimic enhancement

AM5 Socket B850 Motherboard

The ASRock B850 Pro RS is an ATX motherboard built for AMD Ryzen 7000, 8000 and 9000 series processors. It uses the B850 chipset and delivers a 14+2+1 phase power design with 80A Dr.MOS. Four DDR5 slots support up to 256GB of memory at speeds up to 8000+(OC) with AMD EXPO and Intel XMP 3.0 profiles.

Builders needing PCIe 5.0 graphics and Gen5 M.2

This board suits users who want a single PCIe 5.0 x16 slot for current and future GPUs and a CPU-attached Blazing M.2 socket running at Gen5x4 128 Gb/s. It also provides two chipset Hyper M.2 sockets at Gen4x4 and one Ultra M.2 at Gen3x4. Builders requiring multiple PCIe 5.0 x16 slots or more than four M.2 sockets should look at higher-tier chipsets.

PCIe 5.0 x16 slot runs at Gen5x16 with 9000 and

The primary graphics slot operates at PCIe 5.0 x16 when paired with Ryzen 9000 or 7000 series processors. With Ryzen 8000 Phoenix 1 series it drops to Gen4x8, and with Phoenix 2 series to Gen4x4. This single specification determines whether your chosen CPU can saturate the graphics bandwidth.

Points forts

  • Supports Ryzen 7000, 8000 and 9000 Series CPUs via AM5 socket
  • 14+2+1 phase power design with 80A Dr.MOS for stable CPU delivery
  • Four DDR5 slots up to 8000 MT/s (OC) with 256 GB maximum capacity
  • PCIe 5.0 x16 graphics slot plus one Blazing M.2 at 128 Gb/s
  • Realtek ALC897 7.1-channel audio with Nahimic enhancement

Caractéristiques

BrandASRock
ModelB850 PRO RS
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to 8000+(OC)
Maximum Memory Supported256GB
Channel SupportedDual Channel
Memory Performance ProfileAMD EXPO / Intel XMP 3.0
ECC SupportedYes
Buffer SupportedUn-buffered
PCI Express 5.0 x161 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
* 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
- 15µ Gold Contact in VGA PCIe Slot (PCIE1)
PCI Express 4.0 x161 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode*
Serial ATA (SATA)4 x SATA 6Gb/s
M.2CPU:
- 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*
* 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
SATA RAIDSupports RAID 0 and RAID 1 for SATA storage devices
Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Audio ChipsetRealtek ALC897
Audio Channels7.1 Channels
LAN ChipsetDragon RTL8125BG
Max LAN Speed2.5Gbps
Back I/O Ports2 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
Onboard USB2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)
Other Connectors1 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 Front Panel Audio Connector
* 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 aut
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24 pin ATX Power Connector
2 x 8 pin 12V Power Connectors (Hi-Density Power Connector)
BIOS Feature256Mb AMI UEFI Legal BIOS with GUI support
SoftwareSoftware
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC
* These utilities can be downloaded from ASRock Live Update & APP Shop.
UEFI
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash
Windows 11Windows OS 10 64-bit / 11 64-bit
FeaturesSuperb Productivity
- PCIe Gen5 (Graphics, M.2)
- Dual Channel DDR5
Rock-Solid Durability
- 14+2+1 Power Phase, 80A Dr.MOS for VCore+SOC+MISC with Enlarged
Heatsink Armor
- Flexible Integrated I/O Shield
Ultrafast Connectivity
- 2.5G LAN
EZ Update
- BIOS Flashback Button
- ASRock Auto Driver Installer
EZ Troubleshooter
- ASRock Post Status Checker
Package Contents2 x SATA Data Cables
1 x Screw for M.2 Socket
Poids d’expédition1.81 kg
Dimensions du colis356 × 279 × 76 mm

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Questions sur cet article

Which DDR5 memory speed and capacity must I already own to use the board's 8000+(OC) EXPO profile?

You need DDR5 modules rated for 8000 MT/s or higher that carry an AMD EXPO profile; the board supports up to 256 GB across four 288-pin slots in dual-channel mode.

If I keep a Ryzen 8000 series CPU, what PCIe 5.0 x16 lane width will the primary graphics slot provide?

With an 8000 series processor the PCIE1 slot runs at Gen4 x8 instead of the full Gen5 x16 available with 7000 or 9000 series chips.

How can I verify the Realtek ALC897 7.1-channel audio is active after installing the board?

Open Windows Sound settings or Realtek Audio Console and confirm 7.1 surround is listed as the default format for the ALC897 device.

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