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ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard — main product image
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard
ASRock

ASRock 90-MXGY00-A0UAYZ FATAL1TY 990FX Killer/3.1 Motherboard

★★★★★3.8 (14 reviews)

An AM3+ gaming motherboard with Quad CrossFireX, Quad SLI, USB 3.1, and M.2 for high-performance AMD builds.

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Overview

The ASRock FATAL1TY 990FX KILLER/3.1 is an ATX motherboard built around the AMD 990FX chipset, targeting gamers and enthusiasts who want to push the AM3+ platform to its limits. It stands out in the AM3+ category by offering both Quad CrossFireX and Quad SLI support, allowing users to run multi-GPU setups with either AMD or NVIDIA graphics cards. The inclusion of USB 3.1 and an M.2 slot brings more current high-speed connectivity options to the platform, addressing one of the common shortcomings of older AM3+ boards. Onboard audio and Gigabit Ethernet round out the feature set with gaming-grade components under the FATAL1TY branding.

As part of ASRock's gaming-oriented lineup, the board uses quality components including reinforced PCIe slots and robust power delivery designed to handle high-TDP AMD FX processors. SATA3 ports provide solid throughput for traditional storage, while the M.2 slot opens the door to faster solid-state options. The ATX layout gives builders room for multiple expansion cards and adequate airflow planning. While the AM3+ platform is no longer receiving new processors, this motherboard represents one of the most capable options for users maintaining, upgrading, or building a system around existing AMD FX hardware.

Key Features

Socket AM3+/AM3

Chipset: North Bridge AMD 990FX & South Bridge AMD SB950

Memory: 4x DDR3-2450(OC)/ 2100(OC)/ 1600/ 1333/ 1066 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 64GB

Slots: 3x PCI-Express 2.0 x16 Slots (two run at x16, one runs at x4), 2x PCI-Express 2.0 x1 Slots

LAN: Qualcomm Atheros Killer E2200 Series PCI-Express x1 Gigabit Ethernet Controller

Form Factor: ATX

Specifications

Brand
ASRock
Model
90-MXGY00-A0UAYZ
Form Factor
ATX
Processor Socket
AM3+
Chipset
AMD 990FX
Memory Type
DDR3 1066
Multi-GPU Support
Quad CrossFireX, Quad SLI
Storage Interface
SATA3, M.2
USB
USB 3.1
Networking
Gigabit Ethernet

Pros & Cons

👍 Pros

  • Supports both Quad CrossFireX and Quad SLI for flexible multi-GPU configurations
  • USB 3.1 and M.2 connectivity provide modern high-speed I/O on the AM3+ platform
  • AMD 990FX chipset delivers full PCIe lane allocation for demanding expansion setups
  • Gaming-optimized audio and Gigabit Ethernet built in
  • ATX form factor provides ample expansion slots and board real estate

👎 Cons

  • Limited to DDR3 memory which is slower and less available than DDR4
  • AM3+ socket is an end-of-life platform with no upgrade path to newer AMD processors
  • No integrated graphics means a dedicated GPU is required for any display output
  • BIOS and driver updates may be infrequent given the age of the platform
  • Power consumption runs higher than comparable modern chipset solutions

Frequently Asked Questions

The FATAL1TY 990FX KILLER/3.1 supports AMD AM3+ socket processors, including FX-series chips such as the FX-8350 and FX-9590.
Yes, it supports both Quad CrossFireX for AMD graphics cards and Quad SLI for NVIDIA graphics cards, giving you flexibility in multi-GPU setups.
The board supports DDR3 1066 memory. Refer to ASRock's qualified vendor list for specific module compatibility and maximum capacity per slot.
The M.2 slot provides high-speed storage connectivity. Check ASRock's specifications page for this model to confirm NVMe protocol support and supported drive lengths.
The FATAL1TY branding indicates it is part of ASRock's gaming-focused lineup, featuring enhanced audio, networking, and component quality tuned for gaming and high-performance workloads.

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