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Asus ROG Zenith II Extreme Alpha Review: More Overkill?

Still Premium, Still Pricey

Asus ROG Zenith II Extreme Alpha
Editor's Choice
(Image: © Asus)

Our Verdict

With the best overclocking features in its price class, the ROG Zenith II Extreme Alpha earns our vote for Threadripper-based extreme performance builds.


  • 28% greater maximum power output than its predecessor
  • Excellent overclocking capabilities
  • Consistent overclocking options with few missed boots and no lost settings
  • Buttons and switches ease recovery from failed overclocks
  • OLED status display helps diagnose boot failures


  • Single 10Gb/s Ethernet where competitor has twin ports
  • $850 is still a whole lot for a motherboard

Asus’ original Zenith II Extreme seemed like one of the best TRX40 models when we tested it, but it was tough to justify its price. And now that we’ve tested the only other $850 TRX40 motherboard on the market (Gigabyte's TRX40 Aorus Xtreme), we might be ready to finally make our decision. Asus sent a new board just in time to take a second bite of the apple.


ChipsetAMD TRX40
Form FactorEATX (10.9"-deep)
Voltage Regulator16 Phases
Video Ports
USB Ports20Gb/s: (1) Type-C 2x2; 5Gb/s: (4) Type A, 10Gb/s: (6) Type A, (1) Type-C
Network Jacks10GbE, Gigabit Ethernet, (2) Wi-Fi Antenna
Audio Jacks(5) Analog, (1) Digital Out
Legacy Ports/Jacks
Other Ports/JackBIOS Flashback, CLR_CMOS buttons
PCIe x16(4) v4.0 (x16/x8/x16/x8*) (*four lanes shared with M.2-2)
PCIe x8
PCIe x4
PCIe x1
CrossFire/SLI4x / 3x
DIMM slots(8) DDR4
M.2 slots(1) PCIe 4.0 x4* / SATA, (2) PCIe 4.0 x4^, (Takes 4 lanes from *PCIe 4, ^SATA E1-4)
U.2 Ports
SATA Ports(8) SATA 6Gb/s (four shared)
USB Headers(2) v3.x Gen2, (2) v3.x Gen1, (2) v2.0
Fan Headers(6) 4-Pin (plus 6 on expander card)
Legacy InterfacesSystem (Beep-code) Speaker
Other InterfacesFP-Audio, TPM, (2) ARGB LED, (2) RGB LED, Asus Node, Water In/Out/Flow, (2) Thermistor
Diagnostics PanelVerbose (Asus LiveDash)
Internal Button/SwitchPower, FlexKey, Safe Boot, Boot Retry, BIOS Switch / Slow Mode, M.2-3 Disable, FS Fan 
SATA Controllers(2) AMS1062 PCIe x2, Integrated (0/1/10)
Ethernet ControllersAQC107 PCIe, WGI211AT PCIe
Wi-Fi / BluetoothIntel AX200 802.11ax (2.4 Gb/s) / BT 5.0 Combo
USB ControllersASM3242 PCIe x4, (2) ASM1074 4-port USB 3.0 Hub
HD Audio CodecALC1220
DDL/DTS Connect
Warranty3 Years

We pored over the specs to see if anything changed, and even asked Asus PR, only to be given a vague description of the Zenith II Extreme Alpha being better-optimized for extreme overclocking. We looked for even the slightest alteration, and finally came across a tiny update: While the original Zenith II Extreme had sixteen 70A MOSFETs, the new one is fitted with Infineon TDA21490 90A parts.

(Image credit: Tom's Hardware)

Connected via a heat pipe, the second voltage regulator heatsink covers much of what gives the Zenith II Extreme Alpha its connectivity. This includes a Aquatia 10Gb/s Ethernet controller, Intel Gigabit Ethernet controller, ASMedia USB3.2 Gen 2x2 controller and a four-port USB3 Gen1 hub. 

(Image credit: Tom's Hardware)

Flipping the board, we found that the improved MOSFETs are driven by the same ASP1405I controller, which appears to be a rebranded Infineon IR35201. We can also see the shine of where the rear cover’s thermal pad contacts the board, directly beneath its CPU core power transistors. 

(Image credit: Tom's Hardware)

Audio is provided from two onboard USB adapters using Asus’s version of the ALC1220 codec and an ESS9018Q2C DAC. 

(Image credit: Tom's Hardware)

Like the audio and I/O controllers, every connector on the Zenith II Extreme Alpha appears to be carried over from its predecessor, from the USB BIOS Flashback and CLR_CMOS buttons as well asthe USB Type-C and Type-C 2.2 ports on the I/O panel, to the collection of advanced buttons and switches in the forward bottom corner described in our earlier review. Even the Live Dash OLED panel above the I/O ports, and the x16/x8/x16/x8 PCIe slot spacing that favors two triple-slot graphics cards, remain. 

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If you want to add M.2 drives to the Zenith II Extreme, you need to remove a large cover for both slots. It’s not connected to the fan shroud, however, so you can leave it off if your drives have their own heatsinks. 

(Image credit: Tom's Hardware)

Changes beyond the upgraded voltage regulator components weren’t found on the board, but within its installation kit. While we didn’t find the Asus-branded screwdriver in the Alpha kit, the Zenith II Extreme’s DIMM.2 two-drive M.2 riser card, six-port Fan Extender card, and USB flash drive loaded with drivers and applications remain. 

(Image credit: Tom's Hardware)

Zenith II Extreme Alpha buyers also get a printed manual, eight SATA cables of various shapes (including two with braided covers), RGB and ARGB extension cables, three thermistor cables, a dual-band Wi-Fi antenna, a sticker pack, a discount code for and a coaster. 

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Thomas Soderstrom
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.