ASRock

ASRock AMD 990FX Extreme9 AMD 3-Way CrossFirex

Name: ASRock AMD 990FX Extreme9 AMD 3-Way CrossFirex
Brand: ASRock
SKU: B00B7AN51I

Status: ASRock AMD 990FX Extreme9 AMD 3-Way CrossFirex: Unavailable on Amazon as of 2026-10-21 04:19 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The ASRock AMD 990FX Extreme9 AMD 3-Way CrossFirex: Four PCIe 2.0 x16 slots support Quad CrossFireX and Quad SLI on one AM3+ board; main trade-off: socket AM3+/AM3 only, so no upgrade path to Ryzen or any modern AMD CPU.

Unavailable on Amazon as of 2026-10-21 04:19 UTC

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-21

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Four PCIe 2.0 x16 slots support Quad CrossFireX and Quad SLI on one AM3+ board
✓ 64GB max across 4 DDR3 DIMMs, with DDR3-2450 overclock support
✓ PS/2 keyboard and mouse ports keep vintage peripherals working natively
✓ Coaxial and optical S/PDIF plus IEEE 1394 cover legacy audio and video capture

Cons

✗ Socket AM3+/AM3 only, so no upgrade path to Ryzen or any modern AMD CPU
✗ PCIe 2.0 halves the per-lane bandwidth of PCIe 3.0 and later graphics cards
✗ Second x16 slot drops to x4, limiting real four-card scaling
✗ DDR3-only memory means reusing or sourcing out-of-production RAM

Manufacturer description

ASRock 990FX EXTREME9 Socket AM3+/ AMD 990FX/ Quad CrossFireX & Quad SLI/ SATA3&USB3.0/ A&GbE/ ATX Motherboard

SpecPicks Verdict

SpecPicks scored ASRock AMD 990FX Extreme9 AMD 3-Way CrossFirex using a rating × review-volume × price-fit model applied to published specs and reviews across the motherboards category. ASRock's motherboards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

CPU: Socket AM3+/AM3
Memory: 4x DDR3-2450(OC)/ 2100(OC)/ 1600/ 1333/ 1066 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 64GB
Slots: 4x PCI-Express 2.0 x16 Slots (one runs at x16, one runs at x4, others - single run at x16/x8 or dual run at x8/x8), 1x PCI-Express 2.0 x1 Slot, 1x PCI Slot
SATA: 8x SATA3 Ports, Six Support RAID 0, 1, 0+1, 5, JBOD
Ports: 8x USB 3.0 Ports (4 rear, 4 via headers), 8x USB 2.0 Ports (4 rear, 4 via headers), 1x PS/2 Mouse Port, 1x PS/2 Keyboard Port, 2x eSATA3 Ports, 1x Coaxial S/PDIF Out, 1x Optical S/PDIF Out, 1x IEEE 1394 Port, 1x RJ45 LAN Port, Audio I/O Jacks
Form Factor: ATX

Full Specifications

CPU	Socket AM3+/AM3
SATA	8x SATA3 Ports, Six Support RAID 0, 1, 0+1, 5, JBOD
Brand	ASRock
Memory	4x DDR3-2450(OC)/ 2100(OC)/ 1600/ 1333/ 1066 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 64GB
USB 2.0	4
Platform	Windows 8.1
CPU Socket	AMD - AM3+
Model Name	Extreme9
Unit Count	1 Count
Form Factor	ATX
Chipset Type	AMD 990FX
Connectivity	USB
Model Number	990FX EXTREME9
Chipset Family	AMD 990FX
Mfr Part Number	990FX EXTREME9
Number of Items	1
Number of Ports	22
Total Usb Ports	10
Processor Socket	AMD - AM3+
Total PCIe Ports	5

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