ASUS Prime B850M-KASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B850M-K motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.CPUAMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors** Refer to https: www.asus.com support download-center for CPU support list.ChipsetAMD B850 ChipsetMemory2 x DIMM slots, max. 128GB, DDR5 Supports up to8200+MT s(OC) with Ryzen™ 9000 Series Processors,8400+MT s(OC) with Ryzen™ 8000 Series Processors,8000+MT s(OC) with Ryzen™ 7000 Series Processors,ECC and Non-ECC Un-buffered DIMM*Dual channel memory architectureSupports AMD Extended Profiles for Overclocking (EXPO™)ASUS Enhanced Memory Profile (AEMP)* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU Memory Support list under the Support tab of product information site or visit https: www.asus.com support download-center . Adjustments will be made based on the specifications of mass-produced memory products available on the market.* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.Graphics1 x DisplayPort**1 x HDMI™ port*** * Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.** Supports max. 8K@30Hz as specified in DisplayPort 1.4.*** Supports 4K@60Hz as specified in HDMI 2.1.Expansion SlotsAMD Ryzen™ 9000 & 7000 Series Desktop Processors*1 x PCIe 5.0 x16 slot (supports x16 mode)AMD Ryzen™ 8000 Series Desktop Processors1 x PCIe 4.0 x16 slot (supports x8 x4 mode)**AMD B850 Chipset1 x PCIe 4.0 x16 slot (support x4 mode)* Please check the PCIe bifurcation table on the support site (https: www.asus.com support FAQ 1037507 ).** Specifications vary by CPU types.- To ensure compatibility of the device installed, please refer to https: www.asus.com support download-center for the list of supportedStorageSupports 2 x M.2 slots and 4 x SATA 6Gb s portsAMD Ryzen™ 9000 & 7000 Series Desktop ProcessorsM.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)M.2_2 slot (Key M), type 2242 2260 2280 (supports PCIe 4.0 x4 mode)AMD Ryzen™ 8000 Series Desktop ProcessorsM.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)M.2_2 slot (Key M), type 2242 2260 2280 (supports PCIe 4.0 x4 x2 mode)*AMD B850 Chipset4 x SATA 6Gb s ports* Specifications vary by CPU types.AMD RAIDXpert2 TechnologyRyzen™ 9000 Series Processors: RAID 0 1 5 10Ryzen™ 8000 Series Processors: RAID 0 1Ryzen™ 7000 Series Processors: RAID 0 1 10Ethernet1 x Realtek 2.5Gb EthernetASUS LANGuardUSBRear USB (Total 8 ports)2 x USB 10Gbps ports (2 x Type-A)2 x USB 5Gbps ports (2 x Type-A)4 x USB 2.0 ports (4 x Type-A)Front USB (Total 7 ports)1 x USB 5Gbps connector (supports USB Type-C)1 x USB 5Gbps header supports 2 additional USB 5Gbps ports2 x USB 2.0 headers support 4 additional USB 2.0 ports* USB Type-C power delivery output: max. 5V 3AAudioRealtek 7.1 Surround Sound High Definition Audio CODEC*- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking- Supports up to 24-Bit 192 kHz playbackAudio Features- Audio Shielding- Premium audio capacitors- Dedicated audio PCB layers* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.Back Panel I O Ports2 x USB 10Gbps ports (2 x Type-A)2 x USB 5Gbps ports (2 x Type-A)4 x USB 2.0 ports (4 x Type-A)1 x DisplayPort1 x HDMI™ port1 x Realtek 2.5Gb Ethernet port3 x Audio jacks1 x BIOS FlashBack™ button1 x PS 2 Keyboard Mouse combo portInternal I O ConnectorsFan and Cooling Related1 x 4-pin CPU Fan header3 x 4-pin Chassis Fan headersPower Related1 x 24-pin Main Power connector1 x 8-pin +12V CPU Power connectorStorage Related2 x M.2 slots (Key M)4 x SATA 6Gb s portsUSB1 x USB 5Gbps connector (supports USB Type-C )1 x USB 5Gbps header supports 2 additional USB 5Gbps ports2 x USB 2.0 headers support 4 additional USB 2.0 portsMiscellaneous3 x Addressable RGB Gen 2 headers1 x Clear CMOS header1 x COM Port header1 x Front Panel Audio header (F_AUDIO)1 x S PDIF Out header1 x SPI TPM header (14-1 pin)1 x 10-1 pin System Panel headerSpecial FeaturesASUS 5X PROTECTION III- DIGI+ VRM- LANGuard- Overvoltage protection- SafeSlot- Stainless-steel back I OASUS Q-Design- Q-Dashboard- Q-DIMM- Q-LED Core- Q-SlotASUS Thermal Solution- M.2 heatsink- VRM heatsink designASUS EZ DIY- BIOS FlashBack™ button- BIOS FlashBack™ LED- SafeSlotAura Sync- Addressable RGB Gen 2 headersSoftware FeaturesASUS Exclusive SoftwareArmoury Crate- Aura Creator- Aura Sync- Fan Xpert 2+ASUS AI AdvisorASUS DriverHubTurboV CoreASUS CPU-ZAdobe Creative Cloud (Free Trial)Norton 360 Deluxe (60 Days Free Trial)WinRAR (40 Days Free Trial)UEFI BIOSASUS EZ DIY- ASUS CrashFree BIOS 3- ASUS EZ Flash 3- ASUS UEFI BIOS EZ Mode- ASUS MyHotkeyBIOS256 Mb Flash ROM, UEFI AMI BIOSManageabilityWOL by PME, PXEAccessoriesCables2 x SATA 6Gb s cablesMiscellaneous1 x I O Shield1 x M.2 rubber package1 x Screw package for M.2 SSDDocumentation1 x Quick start guideOperating SystemWindows 11, Windows 10 64-bitForm Factormicro-ATX Form Factor9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )