B450 II SERIES MOTHERBOARDS

EXPERTLY TUNED AND COOLED

Comprehensive Cooling

Cooler through Refinements

New alloy chokes with higher power conversion, lower power dissipation and better temperature control offer more efficient performance. ASUS B450 II series motherboards also feature high-quality thermal pads to effectively transfer heat from the VRM array to a large, high-surface-area heatsink.


*Select models only

Fan Xpert

Fan Expert 4 provides comprehensive control over fans, water pumps and all-in-one (AIO) coolers. Control is also possible via the award-winning ASUS UEFI. Whether you're cooling with air or water, Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode, which reduces all fan speeds to below the default minimum — keeping your system whisper-quiet when performing light tasks.


Build Smart

BIOS FlashBack™

To easily update the UEFI (BIOS), users can plug a FAT32-formatted USB drive with the new BIOS file into the USB BIOS FlashBack port and simply press a button. Updates can be made even if memory and a processor aren’t present.

Media-Acclaimed UEFI BIOS

The renowned ASUS UEFI (BIOS) provides everything needed to configure, tweak and tune builds. It offers simplified options for newcomers to PC DIY, as well as comprehensive features for seasoned builders. ASUS B450 II series includes 256 MB BIOS Flash ROM for future-proof compatibility.

AI NOISE-CANCELING

MICROPHONE

AI noise-canceling microphone software is exclusively featured on ASUS motherboards and supports 3.5 mm*, USB, or Bluetooth headsets. The utility leverages a massive deep-learning database to preserve the sound of your voice while eliminating distracting keyboard clatter, mouse clicks, and other forms of environmental noise. And it only places a slight load on the CPU, ensuring minimal impact on gaming performance.

*An audio splitter (3.5 mm audio jack Y-cable) is necessary when using a 3.5 mm headset.

Download Setup Guide

3DMark - FPS (2560x1440)
*Testing configuration: CPU: AMD Ryzen 5 3600x; Motherboard: ROG Strix B450-F Gaming II; Graphics card: NVIDIA RTX 2060-O6G; DRAM: Hynix 2666 16GB; Power: Seasonic 430W; HDD: Seagate M.2 NVME 2TB; Cooling: Enermax T.B.APOLLISH; Voice Communication App: Discord (In-app noise canceling effects disabled) ; Background noise: Keyboard typing, mouse clicking, people talking, and music playing
*Actual performance varies by configuration

HEAR THE DIFFERENCE

AI OFF
AI ON

Background noise

Other human voice

Human speech

CHOOSE YOUR B450 MOTHERBOARD

ROG Strix B450-F Gaming II

  • ATX

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

  • 8+4 Power Stages

  • High-quality thermal pad & backplate

  • M.2 Heatsink

  • AI Noise-Canceling Microphone, AI Networking

LEARN MORE

TUF Gaming B450-PLUS II

  • ATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

  • USB 3.2 Gen 2 Type-A & Type-C

LEARN MORE

TUF Gaming B450M Pro-S

  • mATX

  • AI Noise-Canceling Microphone

  • 2.5Gb Ethernet

  • USB 3.2 Gen 2 Type-A & Type-C

  • Onboard VRM and M.2 Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

TUF Gaming B450M-PRO II

  • mATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A & Type-C

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

TUF Gaming B450M-PLUS II

  • mATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A, USB 3.2 Gen 1 Type-C

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

Prime B450M-A II

  • mATX

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

Prime B450M-K II

  • mATX

  • 1Gb Ethernet

  • USB 3.2 Gen 1 Type-A

  • Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

ROG Strix B450-F Gaming II

  • ATX

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

  • 8+4 Power Stages

  • High-quality thermal pad & backplate

  • M.2 Heatsink

  • AI Noise-Canceling Microphone, AI Networking

LEARN MORE

TUF Gaming B450-PLUS II

  • ATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

  • USB 3.2 Gen 2 Type-A & Type-C

LEARN MORE

TUF Gaming B450M Pro-S

  • mATX

  • AI Noise-Canceling Microphone

  • 2.5Gb Ethernet

  • USB 3.2 Gen 2 Type-A & Type-C

  • Onboard VRM and M.2 Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

TUF Gaming B450M-PRO II

  • mATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A & Type-C

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

TUF Gaming B450M-PLUS II

  • mATX

  • AI Noise-Canceling Microphone

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A, USB 3.2 Gen 1 Type-C

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

Prime B450M-A II

  • mATX

  • 1Gb Ethernet

  • USB 3.2 Gen 2 Type-A

  • Onboard VRM / Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

Prime B450M-K II

  • mATX

  • 1Gb Ethernet

  • USB 3.2 Gen 1 Type-A

  • Chipset Heatsink

  • BIOS FlashBack™ (BIOS Flash ROM 256Mb)

LEARN MORE

SPECIFICATIONS

  ROG Strix TUF Prime
Model ROG Strix B450-F Gaming II ROG Strix B450-I Gaming TUF Gaming B450-PLUS II TUF Gaming B450M-PRO II TUF Gaming B450M-PLUS II Prime B450M-A II Prime B450M-K II
Form factor ATX Mini-ITX ATX mATX mATX mATX mATX
Power architecture 8+4 6+1 8+2 8+2 4+2 4+2 4+2
Memory # Slots, Maximum capacity 4 x DIMM, Max. 128GB 2 x DIMM, Max. 64GB 4 x DIMM, Max. 128GB 4 x DIMM, Max. 128GB 4 x DIMM, Max. 128GB 4 x DIMM, Max. 128GB 2 x DIMM, Max. 64GB
Memory speed (MHz) 4400MHz(O.C.) 4400MHz(O.C.) 4400MHz(O.C.) 4400MHz(O.C.) 4400MHz(O.C.) 4400MHz(O.C.) 4400MHz(O.C.)
Graphics output HDMI 2.0b / DP 1.2 HDMI 2.0b HDMI 2.0b / DP 1.2 HDMI 2.0b / DP 1.2 HDMI 2.0b / DVI-D HDMI 2.0b / DVI-D / D-Sub HDMI 2.0b / DVI-D / D-Sub
Multi-GPU support 3-way CFX - 2-way CFX 2-way CFX 2-way CFX - -
  PCIe 3.0 x16 2 x PCIe 3.0 x16
(@x16 or @x8/x4)		 1 x PCIe 3.0 x16
(@x16)		 1 x PCIe 3.0 x16
(@x16)		 1 x PCIe 3.0 x16
(@x16)		 1 x PCIe 3.0 x16
(@x16)		 1 x PCIe 3.0 x16
(@x16)		 1 x PCIe 3.0 x16
(@x16)
PCIe 2.0 x16 1 x PCIe 2.0 x16
(max. @x4)		 - 1 x PCIe 2.0 x16
(max. @x4)		 1 x PCIe 2.0 x16
(max. @x4)		 1 x PCIe 2.0 x16
(max. @x4)		 - -
PCIe x1 3 - 3 1 1 2 2
Storage & Connectivity SATA 6Gb/s 6 4 6 6 6 6 4
M.2 1*M.2 2280
(PCIe 3.0 x4 & SATA)
1*M.2 22110
(PCIe 3.0 x4)		 1*M.2 2280
(PCIe 3.0 x4 & SATA)
1*M.2 2280
(PCIe 3.0 x4)		 1*M.2 22110
(PCIe 3.0 x4 & SATA)
1*M.2 2280
(PCIe 2.0 x4)		 1*M.2 2280
(PCIe 3.0 x4 & SATA)
1*M.2 22110
(PCIe 3.0 x2 & SATA)		 1*M.2 22110
(PCIe 3.0 x4 & SATA)		 1*M.2 22110
(PCIe 3.0 x4 & SATA)		 1*M.2 2280
(PCIe 3.0 x4 & SATA)
USB 3.2 GEN 2 2(2A@B) 2(2A@B) 2(1A1C@B) 2(1A+1C@B) 1(1A@B) 2(2A@B) -
USB 3.2 GEN 1 6 (3A+1C@B, 2@F) 6 (4@B, 2@F) 5 (4@B, 1@F) 6 (4@B, 2@F) 5 (2A+1C@B, 2@F) 6 (4@B, 2@F) 6 (4@B, 2@F)
USB 2.0 4 (2@B,2@F) 2 (2@F) 6 (4@F, 2@B) 6 (2@B, 4@F) 6 (2@B, 4@F) 4 (4@F) 6 (2@B, 4@F)
Wireless M.2 E Key only Realtek 802.11 - - - - -
Networking Ethernet Intel® I211-AT 1Gb Intel® I211-AT 1Gb Realtek L8200A 1Gb Realtek RTL8111H 1Gb Realtek RTL8111H 1Gb Realtek RTL8111H 1Gb Realtek RTL8111H 1Gb
LANGuard V V V V V V V
Audio Audio codec SupremeFX S1220A SupremeFX S1220A Realtek ALC S1200A Realtek ALC S1200A Realtek ALC887 Realtek ALC887 Realtek ALC887
Impedence sense V V - - - - -
Audio AMP V V - - - - -
Audio cover V V V V V - -
Japanese capacitors V V V V V V V
Audio effects Sonic Studio III + Sonic Studio Virtual Mixer
Sonic Radar III		 Sonic Studio III + Sonic Studio Virtual Mixer
Sonic Radar III		 DTS Custom for GAMING Headsets DTS Custom for GAMING Headsets DTS Custom for GAMING Headsets - -
AI Noise-Canceling Microphone V - V V V - -
Cooling Onboard Fan headers 6 3 4 3 3 3 2
Heatsinked M.2 1 1 - - - - -
AI Networking (GameFirst VI) V GameFirst IV - - - - -
Aura Sync V V V V V V -
RGB header 1*ARGB, 2*RGB 1*ARGB, 1*RGB 2*RGB 2*RGB 1*RGB 1*RGB -
CPU power connector 8-pin 8-pin 8-pin 8-pin 8-pin 8-pin 8-pin