ASROCK Z370 Killer SLI/AC Review

The Asrock Z370 Killer SLI/AC is a mid-range motherboard that offers a lot of high-end features at an affordable price.

We discuss a number of features in our review, from its impressive overclocking capabilities to the inclusion of SLI.  

ASROCK Z370 Killer SLIAC Review

This review will cover everything you need to know before making a final decision.

Have a look at our “Common asked questions” if you are still uncertain.

ASROCK Z370 Killer SLI/AC (Our Review)

Overall Assessment

Hardware and Storage

The ASROCK Z370 Killer SLI/AC is equipped with four DDR4 DIMM slots supporting a maximum of 64GB RAM capacity.

It has an LGA 1151 CPU socket that is designed to support the 8th generation CPUs from Intel, which is a let-down to anyone that is using the 6th and 7th generation CPUs as they are not supported with this motherboard.

The ASROCK Z370 Killer SLI/AC has a total of six PCIe slots, two of which are reinforced and support two-way SLI and Crossfire.

This means you can run two GTX cards simultaneously which is a massive benefit to gamers who prioritize the highest settings when playing games. The reinforcement of these slots also increases its rigidity and allows for heavier graphics cards.

The motherboard also has two M.2 slots allowing you to make use of SSD storage options. Using SSDs results in faster data transfers compared to slower HDD speeds.

We appreciated the placement of these slots as they aren’t located beneath the graphics card slot and are instead strategically placed away from it. This eliminates any issues of the SSDs experiencing heat.

Whilst other boards like the  ASRock B450 Pro4 have an extra CPU fan, the Z370 Killer SLI/AC has enough headers to make use of a good cooling system for your rig.

Rear I/O

Whilst having a variety of ports, the rear I/O is left feeling empty due to the lack of Clear CMOS or BIOS Flashback buttons. There is also a lack of a 2nd generation USB 3.1 port.

The ports that are present include five audio jacks with a S/PDIF Output, a dual connecter PS/2 port for mouse and keyboard, an Intel Gigabit LAN port, four USB 3.0 ports, support for USB Type C, and a DVI and HDMI port.


The Z370 Killer SLI/AC has a Realtek ALC890 chipset with 7.1 HD audio support.

When compared to the ASRock Z270 Extreme 4’s Purity Sound4 audio codec, the ALC890 chipset is seen as inferior and outdated. Where the former eliminates noise interference, the latter unfortunately still has that issue.


This motherboard, unlike the ASRock X370 Killer SLI/AC, doesn’t have the K-series branding. It instead goes for a sleek black and grey color scheme that should complement any build you desire.

The ASRock Z370 Killer SLI/AC also supports RGB lighting for those who wish to add more color to their rig.  The colors and lighting modes can be set using ASRock’s Aura RGB LED software.

BIOS and Overclocking

The ASRock Z370 Killer SLI/ac has a UEFI BIOS with a blue interface. It gives you the option to switch between an EZ and Advanced mode.

EZ mode gives you a general overview of your PC’s hardware with functions including turning on RAID support.

The Advanced mode is where the overclocking magic happens. This is where you can adjust the voltage and clock speeds of your separate hardware components to create overclocking profiles.

In terms of overclocking, the motherboard has a ten-phase power design with a maximum memory overclock of 4266Mhz. Despite this being a weaker power design than the ASRock Z390 Taichi or ASRock Z390 Pro4, it is more than capable of overclocking the K-series chips up to the 8700k.

The ASRock Z370 Killer SLI/AC maintained a stable 4.8GHz when overclocking an I7-8700k CPU.


  • Built-in Wi-Fi
  • Good overclocking capabilities
  • Affordable
  • Reinforced PCIe slots


  • Outdated Audio system
  • Not enough Rear I/O ports

Common Questions about ASRock Z370 Killer SLI/AC

Is this an ATX form factor motherboard?

The ASRock Z370 Killer SLI/AC is not a standard-sized ATX form factor and is instead a ¾ width board. This means that you should purchase a smaller tower if you want this motherboard to fit comfortably.

What is the maximum speed of the Wi-Fi?

The Wi-Fi on the ASRock Z370 Killer SLI/AC can support wireless connections at high speeds up to 433 Mbps.

Are there any buttons present on the board?

This motherboard, unfortunately, has no onboard or rear I/O buttons but makes up for it by having integrated Wi-Fi and Bluetooth functionality.

Customer Reviews

“This is a very impressive motherboard with an amazing BIOS. I managed to boot Windows 10 off one of the M.2’s while the other I used as a storage drive using an HDD. I also duplicated my boot drive onto an SSD should my M.2 fail to boot up. The only improvements I could think of would be to add more fan headers and another USB 3.0 connection.”


5/5 stars

“This motherboard has a good Bios and a very clean black and grey aesthetic. In terms of price, I would say that you get what you pay for. Overclocking proved to be a problem as the VRM heatsinks aren’t very effective and are the worst feature this board has to offer.  It also throttled my 8700k CPU. The motherboard is also much narrower than a standard ATX board. Lastly, this motherboard needs more fan headers. It’s not a bad board, but it doesn’t come without its issues.”

Newegg user

3/5 stars

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