Asus Sabertooth 990FX review

Does this AMD 990FX-based motherboard have the teeth to defeat Intel's Z68 chipset?

Asus Sabertooth 990FX
For a 95-quid board, this is a feature-rich, overclocker's paradise

TechRadar Verdict

Excellent build quality and BIOS make this another great Asus offering.


  • +

    Sturdy build

  • +

    Feature-rich Bios

  • +



  • -

    We've seen better performers in CPU tasks

Why you can trust TechRadar We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

The top-of-the-range AMD 990FX chipset in the Asus Sabertooth 990FX motherboard is all about adding support for AMD's formidably titled and mysterious Bulldozer CPUs.

Those eight-core, quad-mod Bulldozer chips should at the very least match the Intel i7 2600K pace for pace. Intel's chip is a four core, eight-threaded affair, while the Bulldozer chip will have eight actual cores.

All that processing magic will appear on store shelves in Zambezi quad-mod chips before you'll be digging your winter coat out, but for existing AMD CPU customers, the Bulldozer-ready Asus Sabertooth 990FX still has features to offer right now.

First, there's a landmark moment for AMD boards and multi-GPU. It's SLI and it's available across a range of the 9-series boards. Gigabyte's GA-990FXA-UD7 will actually support 4-way SLI or CrossFireX setups, while this Sabertooth can hack three-way support.

This is quite a big selling point for loyal AMD gamers – these are the first motherboards to support Nvidia's multi-GPU tech, and the very fact it's included suggests Bulldozer has the grunt to match SLI'd GPUs.

Sabertooth comes without that TUF thermal armour that gives its P67 iteration that odd look, but still sports the rugged design and heatsinks painted in ubiquitous military tones.

There's plenty of space to fit a cooler, the side mounted SATA ports are out of your GPU's way, and it's compact enough to fit in most cases despite supporting three GPUs.

TechRadar Labs

tech labs

AMD 9-Series

CPU video encoding performance
X246 v4: Frames per second: Higher is better
ASRock Fatal1ty 990FX: 33
Asus M5A99X EVO: 33
Asus RoG Crosshair V: 33
Asus Sabertooth 990FX: 32
Gigabyte 970A-UD3: 33
Gigabyte H67MA-UD2H: 33
Gigabyte 990FXA-UD7: 33
MSI 970A-G45: 33

CPU rendering performance
Cinebench 11.5: Index score: Higher is better
ASRock Fatal1ty 990FX: 5.86
Asus M5A99X EVO: 5.86
Asus RoG Crosshair V: 5.86
Asus Sabertooth 990FX: 5.72
Gigabyte 970A-UD3: 5.78
Gigabyte H67MA-UD2H: 5.83
Gigabyte 990FXA-UD7: 5.74
MSI 970A-G45: 5.71


It's not the beast performing motherboard we've seen, but the military stylings betray the serious overclocking performance you can get out of the Sabertooth.

Ultimately, the excellent build quality and Bios make this motherboard another great Asus offering.

Follow TechRadar Reviews on Twitter: