ASRock

ASRock A55 PRO3 AMD-FM1 Motherboard

4.0 (6 reviews)
USB 2.0USB 3.0

ATX motherboard for AMD FM1 processors with CrossFireX multi-GPU support, SATA3, and USB 3.0 connectivity.

$75.99*
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*Price sourced from Amazon.com. Last updated:Jul 20, 2026.Price and availability are subject to change.

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Overview

The ASRock A55 PRO3 is an ATX motherboard built around the AMD A55 FCH chipset, designed for AMD's FM1 socket processors including the A-Series APUs and select Athlon II models. At the time of its release, the FM1 platform offered an appealing combination of integrated graphics performance and discrete GPU support, and the A55 PRO3 capitalized on this with AMD Quad CrossFireX capability for users who wanted to scale their graphics horsepower. The board supports DDR3 1333 memory, SATA3 storage interfaces for fast hard drive and SSD connectivity, and USB 3.0 ports for high-speed peripheral access — features that made it a well-rounded choice for budget to mid-range builds during its era.

Beyond the core specifications, the A55 PRO3 includes integrated Gigabit Ethernet and onboard audio, minimizing the need for additional expansion cards and keeping build costs down. The ATX form factor provides plenty of physical space and expansion slots for additional cards, storage controllers, or other peripherals. While the FM1 platform has long since been superseded by AMD's AM4 and AM5 sockets, the A55 PRO3 remains relevant for users maintaining existing systems, building retro or legacy-purpose machines, or replacing a failed motherboard in an FM1 rig. Its robust feature set relative to the platform ensures it can serve reliably in these roles.

Key Features

CPU: Socket FM1 Support AMD A8/A6/A4/E2/ Athlon/ Sempron Processors

Chipset: AMD A55 FCH (Hudson-D2)

Slots: 2x PCI-Express 2.0 x16 Slots(one run at x4; Supports AMD Quad CrossFireX/ CrossFireX); 1x PCI-Express 2.0 x1 Slot; 3x PCI Slots

SATA: 2x SATA3 Ports, 5x SATA2 Ports, Support RAID 0/ 1/ 10; 1x eSATA2 Port

Ports: 10x USB 2.0 Ports (4 rear, 6 by headers); 2x USB 3.0 Ports; 2x PS/2 Port; 1x VGA Port; 1x HDMI Port; 1x Optical SPDIF Out; 1x eSATA2 Port; 1x RJ45 LAN Port; Audio I/O Jacks

Power Connector: 1x 24pin main power, 1x 8pin CPU power

Form Factor: ATX

Memory: 4x DDR3-2400+(OC)/1866(OC)/1600(OC)/1333/1066/800 DIMMs

Specifications

Brand
ASRock
Model
A55 PRO3
Chipset
AMD A55 FCH
Form Factor
ATX
Socket
AMD FM1
Memory Type
DDR3 1333
Multi-GPU Support
AMD Quad CrossFireX
Storage Interface
SATA3
USB
USB 3.0
Audio
Integrated Audio
Networking
Gigabit Ethernet

Frequently Asked Questions

The A55 PRO3 supports AMD FM1 socket processors, including the A-Series APUs (such as the A8 and A6 series) and Athlon II X4 processors designed for the FM1 platform.
Yes, the board supports AMD Quad CrossFireX, allowing you to run multiple AMD Radeon graphics cards for improved gaming and compute performance, provided your power supply and case can accommodate the setup.
The A55 PRO3 uses DDR3 memory and supports configurations typical of the FM1 platform. Check ASRock's specification page for the exact maximum capacity and number of DIMM slots.
Yes, it features onboard audio and Gigabit Ethernet, so you do not need to purchase separate sound or network cards for standard use.