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ATX motherboard, black PCB with silver heatsinks and rear I/O shield

ASRock

ASRock B850 Live Mixer WiFi AMD motherboard AM5 256 GB DDR5

SKU CH-DPFS-ZGMJ8 MPN B850 Live Mixer WiFi

Socket AM5 board with 14-phase power, DDR5 to 8000 OC, PCIe 5.0 x16, two Gen4 M.2, two SATA ports, 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
  • Supports Ryzen 7000, 8000 and 9000 series CPUs on AM5 socket
  • 14+2+1 phase power design with 80A Dr.MOS for stable delivery
  • Four DDR5 slots reach 8000+ MT/s OC with 256 GB maximum capacity
  • One PCIe 5.0 x16 slot plus two PCIe 4.0 x16 slots for graphics and add-in cards
  • Realtek ALC1220 7.1-channel audio with Nahimic enhancement for clear sound

AM5 DDR5 motherboard for Ryzen 7000 8000 9000

The ASRock B850 Live Mixer WiFi is an ATX motherboard built around the AMD B850 chipset and the AM5 socket. It accepts Ryzen 7000 8000 and 9000 series processors and provides four DDR5 DIMM slots. The board targets builders who want a full-size platform with extensive rear and front USB connectivity.

256 GB DDR5 capacity and 8000 OC headroom

Four 288-pin slots support up to 256 GB of un-buffered DDR5 running in dual-channel mode. AMD EXPO and Intel XMP 3.0 profiles are supported for speeds up to 8000 MT/s overclocked. ECC memory is accepted for workloads that require error correction. The memory subsystem scales with the installed CPU generation and cooling.

PCIe 5.0 graphics slot and multiple M.2 sockets

One PCIe 5.0 x16 slot runs at Gen 5 x16 with Ryzen 9000 and 7000 chips and at reduced widths with Ryzen 8000 series parts. Two additional PCIe 4.0 x16 slots operate at x4. The CPU provides one Gen 5 M.2 and one Gen 4 M.2 while the chipset adds another Gen 4 M.2. Two SATA 6 Gb/s ports and RAID 0 1 10 support round out storage options.

Highlights

  • Supports Ryzen 7000, 8000 and 9000 series CPUs on AM5 socket
  • 14+2+1 phase power design with 80A Dr.MOS for stable delivery
  • Four DDR5 slots reach 8000+ MT/s OC with 256 GB maximum capacity
  • One PCIe 5.0 x16 slot plus two PCIe 4.0 x16 slots for graphics and add-in cards
  • Realtek ALC1220 7.1-channel audio with Nahimic enhancement for clear sound

Specifications

BrandASRock
ModelB850 Live Mixer WiFi
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, PCIE3 will be disabled.
* Supports NVMe SSD as boot disks
- 15µ Gold Contact in VGA PCIe Slot (PCIE1)
PCI Express 4.0 x162 x PCIe 4.0 x16 Slots (PCIE2 and PCIE3), support x4 mode*
Serial ATA (SATA)2 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*
* 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
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*
* Requires additional M.2 NVMe expansion cards to support RAID 10
Audio ChipsetRealtek ALC1220
Audio Channels7.1 Channels
LAN ChipsetDragon RTL8125BG
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x Optical SPDIF Out Port
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
4 x USB 3.2 Gen1 Type-A Ports*
8 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
1 x Line Out Jack (Gold Audio Jack)
1 x Microphone Input Jack (Gold Audio Jack)
* USB32_12 are Lightning Gaming Ports. USB32_34 support Ultra USB Power
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 Thermistor Cable 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)***
3 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_FAN1~3 and AIO_PUMP support the fan power up to 3A (36W).
*** CPU_FAN2, CHA
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
1 x 4 pin 12V Power Connector (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
- 20K Long-lasting Black Caps (high quality and conductive polymer capacitors)
for VCore
Ultrafast Connectivity
- 2.5G LAN, 802.11be Wi-Fi 7 Module
- ASRock Lightning Gaming Ports
EZ Update
- BIOS Flashback Button
- ASRock Auto Driver Installer
EZ Troubleshooter
- ASRock Post Status Checker
Shipping weight2.02 kg
Package size356 × 292 × 83 mm

Questions about this item

Will my existing DDR5 memory modules fit the four 288-pin slots and run at their rated speeds?

The board has four 288-pin DDR5 slots supporting dual-channel operation up to 256 GB. Memory performance profiles include AMD EXPO and Intel XMP 3.0, with speeds up to 8000+(OC) depending on the modules installed.

How can I verify the PCIe 5.0 x16 slot is running at Gen5 x16 after installing a Ryzen 9000 series processor?

With a Ryzen 9000 series CPU the primary PCIe 5.0 x16 slot (PCIE1) operates at Gen5 x16. Confirm the link width and generation in the BIOS hardware monitor or via a system information utility such as GPU-Z once the system posts.

Which cables and accessories are included in the open-box package, and what must I source separately?

Open-box units typically include the motherboard and I/O shield only. You will need to provide DDR5 memory, an AM5 CPU cooler, SATA cables for the two 6 Gb/s ports, M.2 mounting screws for the three Key-M sockets, and a case with front-panel USB headers for the 3.2 Gen2x2 Type-C and Gen1 connectors.

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