Home › Product Specifications › Motherboards › ASRock

ASRock B550 Phantom Gaming 4/ac

B550 · AM4 · ATX
ASRock B550 Phantom Gaming 4/ac product image

General

ChipsetB550
SocketAM4
Form FactorATX
Supported CPU FamiliesRyzen 3000, Ryzen 4000G, Ryzen 5000, Ryzen 5000G

Highlights

Memory4× DDR4 · max 128 GB · 4733 MT/s
M.2 Slots1×
GPU Slots2× x16 · PCIe 4.0
Fastest USBUSB 5 Gbps
NetworkLAN 1 Gbps · Wi-Fi 5 · Bluetooth 4.2
Power Stages3+2 phases · 55 A

Manufacturer Links

BIOS downloads ↗CPU support list ↗Driver downloads ↗Memory QVL ↗
Is this part compatible with your build?Analyze part compatibility together with PC Analysis.
Analyze in PC Builder

Memory

Memory TypeDDR4
Max RAM Speed4733 MT/s
Max RAM128 GB
DIMM Slots4
RAM Form FactorDIMM
ECC SupportYes

Expansion and Storage

PCIe Version4.0
PCIe x16 Slots2
PCIe x1 Slots2
PCIe Slot Modes
1× PCIe 4.0 x16
1× PCIe 3.0 x16 · electrical: x4
2× PCIe 3.0 x1
M.2 SlotsM.2_1: PCIe 4.0 x4
SATA Ports4
Highest USBUSB 5 Gbps
RAID0/1/10

Power Delivery (VRM)

Phase Layout3+2
CPU Phases3
SoC Phases2
Amps per Phase55 A
PWM ControlleruP9505 (max. 6 phases)
MOSFET12x 55A SM4337/SM4336 (High-/Low-Side)

Connectivity and Audio

Audio CodecRealtek ALC1200
LAN ChipRealtek RTL8111H (1Gb/s)
WirelessWi-Fi 5 · Bluetooth 4.2
Rear I/O
6× USB 5Gbps Type-A
1× HDMI
1× 1 Gbps LAN
2× Wi-Fi antenna connector
3× Audio jacks (3.5 mm)
1× PS/2
Front Panel Headers
4× USB 2.0
2× USB-A 5Gbps
HD Audio (front audio)
Case Fan Headers
1× 4-pin PWM fan
5× Pump (liquid cooling)
RGB Header
2× ARGB (5V 3-pin)
2× RGB (12V 4-pin)
TPM HeaderYes
BIOS Chip32 MB
Dual BIOSNo
Special Features
Audio+solid capacitors
Diagnostic LED (LED indicators)
White Build-compatible (PCB primarily black)
supports AMD 2-Way-CrossFireX (x16/x4)