Review: ASUS MAXIMUS XI Extreme

Perfection Comes With a Price


The Z390 chipset has proven to be a perfect match for the 9th Generation of Intel CPUs with its extremely consistent performance from both the Strix-E and Strix ITX motherboards. For those who are more into the ROG’s original lineup, ASUS ROG MAXIMUS has always been the flagship of the mainstream Intel chipset range ever since the LGA 775 era. And we happened to have several of them here at Ideal Tech PC.

For starters, we wanted to take a look at the cream of the crop, the motherboard that managed to squeeze every possible technology onto a PCB, the (first in Malaysia?) ASUS ROG Z390 Maximus XI Extreme.

ASUS ROG Z390 Maximus XI Extreme

Unsurprisingly the Maximus XI Extreme has a plethora set of specifications. Like the Maximus XI Formula and the Maximus XI Hero before it, the Extreme is equipped with all the Intel Z390 features such as USB 3.1 Gen2 and 2×2 AC WiFi – whilst also having parts that puts the Maximus XI Extreme on its own level, compared to most of Z390 motherboards.

You get the LiveDash OLED display to keep an eye on your overclocking efforts, temperatures and the like. There is also a Aquantia AQC-111C 5G LAN for your high bandwidth networking fun and games.

Up Close

Previously, the ROG motherboard comes with its iconic red boxes. We’ve spent so long looking at the famous red boxes that seeing a black one with the word Maximus on it takes a little bit of adaptation. Inside you get all the accessories that you would expect from such a premium product, and lots of things to hang on your door or help identify your cables in a rush.

Some people are a huge fan of the motherboard armor, as do us. And it is indeed weird to see that it comes with the Maximus XI Formula, rather than the Extreme here.

Then again, Maximus XI Extreme is all about breaking records. It does make sense to not include it as hardcore overclockers tend to remove the armor for subzero-cooling and it is quite difficult to do so.

These are all the accessories that comes along with the motherboard, including with the ROG DIMM.2.

Test Setup

The test setup:

Intel Core i9 9900K, 16GB G.Skill TridentZ Royal 3600MHz, ASUS ROG M̶a̶t̶r̶i̶x̶ ̶P̶l̶a̶t̶i̶n̶u̶m̶ STRIX RTX 2080Ti & FSP Aurum 850W Platinum

Cooling: ASUS ROG Ryujin 360 AIO

The Maximus XI Extreme has 8+8 pin CPU 12V power inputs so that even the most

extreme user won’t run out of Amps to squeeze their 9th Generation Intel CPU.

The Extreme is supplied with the DIMM.2 heatsink that helps spread the temperature generated across a huge surface area whilst also, due to its positioning, putting it more in the airflow of your case when compared to the M.2 drive being tucked away at the bottom of your system below the GPU.

Also, notice the ASUS Mem OK II. An upgraded version of their existing Mem OK

to ensure even the most optimistic overclocking settings

or mismatched RAM is able to be booted back into the BIOS.

There’s also plenty of fan/pump and RGB header around the area as well.

Manual Overclocking

Overclocking the i9 9900K requires a huge amount of tweaking to ensure you can utilize its full potential on all of its 8 cores . Compared to a quad core processor, there are obviously twice as much of a chance for it to be problematic as well.

However, the i9-9900K we have here easily manages to reach a very impressive 5 GHz across all eight cores on the Maximus XI Extreme.

This particular motherboard also has the automatic overclocking features much like its other Z390 siblings and it works spectacularly.

Maximus XI Extreme + i9 9900K on default settings.

Maximus XI Extreme + i9 9900K on 5GHz OC

We conducted the stability test with Prime95 and CoreTemp running on the background. Check out the temperature we managed to get after 3 hours of torture.

  • Stock
  • 5GHz OC

Benchmarks: CPU

Benchmarks: dGPU – Games (Stock VS 5GHZ OC)

Lastly, the dGPU results. We actually love how well the Maximus XI Extreme overclocks and it is very pleasing.

3DMark Time Spy

3DMark Time Spy Extreme

Shadow Of The Tomb Raider


One thing for sure, the Maximus XI Extreme is absolutely gorgeous and ran absolutely AMAZING. We had no stability issues and we believe we can squeeze something more out of it especially if you are planning to build a custom watercooling setup. Or even more, with an LN2, which would be tad bit insane.

However, I have barely mentioned this previously, but the BIOS actually has a new AI overclocking function, basically, it’ll learn how to tweak the processor automatically. In our case it went up to 5.2 GHz. Alas, we had stability issues and after a reboot, it suddenly ran at 4.8~4.9-ish, thus much slower. For now, we tweaked manually. Overclocking wise, we managed to reach roughly 5.1~5.2 GHz on all eight cores 100% stable on our sample. You’ll likely see some CPUs hit at higher clockspeed but that would definitely need some high-end cooling system.

Nevertheless, the new refined aesthetics really caught our attention. Compared to its other siblings, the Maximus XI Extreme does not have the “armor” like the Formula counterpart but the PCB looks really clean albeit with massive sets of features.

If you wish to maximize your hardware performance without compromising looks and features, then the ASUS ROG Z390 Maximus XI Extreme is definitely a MUST in your dream gaming rig. Highly recommended.

You may get this motherboard from us for only RM2399.

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