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ASUS

ASUS PRIME B450M-K II AMD motherboard

SKU CH-D1KC-VFP3Q

Micro-ATX AMD B450 board with two DDR4 slots up to 64 GB, one PCIe 3.0 x16 slot, two PCIe 2.0 x1 slots, four SATA 6Gb/s ports, one M.2 socket supporting 2242, 2260 and 2280 drives.

  • CPU TypeSupports 3rd / 2nd / 1st Gen AMD Ryzen Processors Supports 2
  • ChipsetAMD B450
  • Number of Memory Slots2x288pin (DDR4)
  • Memory StandardDDR4 4400(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) /
  • Maximum Memory Supported64GB
  • Channel SupportedDual Channel
  • Supports Ryzen processors across three generations for broad compatibility
  • Dual-channel DDR4 memory up to 64GB for responsive multitasking
  • PCIe 3.0 x16 slot plus two PCIe 2.0 x1 slots for flexible expansion
  • Four SATA 6Gb/s ports and one M.2 socket for fast storage options
  • Realtek ALC887/897 audio with 7.1 channels for immersive sound

AM4 Ryzen platform

This Micro-ATX board uses the AMD B450 chipset and the AM4 socket. It accepts third, second and first-generation Ryzen CPUs as well as Ryzen and Athlon APUs with Radeon Vega graphics. Two DDR4 slots support up to 64 GB in dual-channel mode and a long list of overclocked speeds up to 4400 MT/s. One PCIe 3.0 x16 slot and two PCIe 2.0 x1 slots handle graphics and add-in cards.

Compact builds and basic upgrades

The small form factor suits compact cases and simple systems that need only one graphics card and two memory modules. Four SATA 6 Gb/s ports and a single M.2 socket covering 2242, 2260 and 2280 lengths provide enough storage connectivity for most mainstream users. Builders who want four memory slots, multiple M.2 sockets or additional PCIe lanes should consider a larger board.

Two DDR4 slots cap memory at 64 GB

Only two 288-pin slots are present, so the maximum supported capacity is 64 GB and expansion beyond that is impossible. If the planned workload needs more memory or four populated slots for bandwidth reasons, this motherboard will not fit the requirement.

Highlights

  • Supports Ryzen processors across three generations for broad compatibility
  • Dual-channel DDR4 memory up to 64GB for responsive multitasking
  • PCIe 3.0 x16 slot plus two PCIe 2.0 x1 slots for flexible expansion
  • Four SATA 6Gb/s ports and one M.2 socket for fast storage options
  • Realtek ALC887/897 audio with 7.1 channels for immersive sound

Specifications

BrandASUS
ModelPRIME B450M-K II (90MB1600-M0EAY0)
CPU TypeSupports 3rd / 2nd / 1st Gen AMD Ryzen Processors
Supports 2nd / 1st Gen AMD Ryzen with Radeon Vega Graphics Processors
Supports AMD Athlon with Radeon Vega Graphics Processors
* Refer to www.asus.com for CPU support list.
ChipsetAMD B450
Number of Memory Slots2x288pin (DDR4)
Memory StandardDDR4 4400(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3300(OC) / 3200(OC) / 3000(OC) / 2933(OC) / 2800(OC) / 2666 / 2400 / 2133*
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
* The maximum memory frequency supported varies by processor.
Maximum Memory Supported64GB
Channel SupportedDual Channel
ECC SupportedECC Memory (ECC mode) support varies by CPU.
Buffer SupportedUn-buffered
PCI Express 3.0 x161 x PCI Express 3.0 x16*
* Actual support may vary by CPU.
PCI Express x12 x PCIe 2.0 x1
Serial ATA (SATA)4 x SATA 6Gb/s
M.23rd / 2nd / 1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics:
1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x4 mode)
Athlon with Radeon Vega Graphics Processors:
1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA mode)
SATA RAID0/1/10
Onboard Video ChipsetSupported only by CPU with integrated graphic
Audio ChipsetRealtek ALC887/897
Audio Channels7.1 Channels
LAN ChipsetRealtek RTL8111H
Max LAN Speed1Gbps
Back I/O Ports1 x PS/2 keyboard/mouse combo port(s)
1 x DVI-D
1 x D-Sub
1 x HDMI
1 x LAN (RJ45) port(s)
4 x USB 3.2 Gen 1 (blue) Type-A
2 x USB 2.0
3 x Audio jack(s)
1 x BIOS FlashBack Button(s)
Onboard USB1 x USB 3.2 Gen 1 (up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) (19-pin)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
Other Connectors1 x CPU Fan connector(s) (1 x 4-pin)
1 x Chassis Fan connector(s) (1 x 4-pin)
1 x SPI TPM header
1 x COM port(s) connector(s)
1 x S/PDIF out header(s)
1 x Front panel audio connector(s) (AAFP)
1 x System panel(s)
1 x Clear CMOS jumper(s)
1 x COM port header
1 x Speaker connector
Form FactorMicro ATX
Dimensions (W x L)8.9" x 8.7"
Power Pin1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
FeaturesSoftware Features:
ASUS Exclusive Software
Armoury Crate
AI Suite 3
- Performance and Power Saving Utility
TurboV EVO
EPU
DIGI+ VRM
Fan Xpert
PC Cleaner
- EZ update
- System Information
ASUS CPU-Z
AI Charger
ASUS EZ Installer
DAEMON Tools
Norton Anti-virus software (Free Trial for 60 days)
WinRAR
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
ASUS Special Features:
ASUS 5X PROTECTION III
- ASUS DIGI+ VRM
- ASUS LANGuard
- ASUS Overvoltage Protection
- ASUS SafeSlot Core
- ASUS Stainless-Steel Back I/O
ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
Package ContentsAccessories:
User's manual
I/O Shield
2 x SATA 6Gb/s cable(s)
1 x M.2 Anchor
1 x Supporting DVD

Questions about this item

Will my Ryzen 5 3600 work without a BIOS update?

The board supports 3rd Gen Ryzen processors, so a Ryzen 5 3600 is compatible.

Can I install two 32 GB DDR4 sticks to reach the 64 GB limit?

Yes, the two 288-pin slots support up to 64 GB total in dual-channel mode.

Does the M.2 slot run at PCIe 3.0 x4 with a Ryzen 3000 CPU?

With a 3rd Gen Ryzen the M.2 socket operates at PCIe 3.0 x4 for both SATA and PCIe drives.

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