Frequently Asked Questions

Questions about the Killer Wireless-AC 1550


Questions about the Killer Wireless-AC 1550

Some users have had questions about the Killer Wireless-AC 1550. This list will be updated frequently, but feel free to contact support at if your question isn't addressed here:

Q: Where can I buy the Killer Wireless-AC 1550?
A: The Killer Wireless-AC 1550 is available as an integrated Wi-Fi adapter in Alienware, MSI, and many other high-end gaming laptops and other machines. You can also purchase the 1550 directly from Amazon at this link: - though availability will be somewhat limited. 

Q: I do not live in the USA. Where can I buy the Killer Wireless-AC 1550?
A: We are currently working toward making the 1550 available for purchase outside of the United States through that same Amazon link. Expected availability currently includes at least the UK. Other availability will be explored at a later time.

Q: Will the Killer Wireless-AC 1550 fit in my machine?
A: The 1550 will fit in any machine that has an M.2 slot that is keyed for a Wi-Fi adapter. However, some machine manufacturers do use a BIOS whitelist to allow only certain hardware to be installed in their machines - usually the same hardware that was an option when the machine was released. Please check with your machine's manufacturer to make sure that your machine will recognize the 1550.

Q: How do I install the Killer Wireless-AC 1550?
A: Installation will be highly dependent on your particular machine. Please refer to your machine's specific service or teardown manual.

Q: Will my machine's antenna work with the Killer Wireless-AC 1550?
A: The 1550 has two antenna connectors - one labeled MAIN and one labeled AUX. These are IPEX-MHF4 receptacles. As these can be fragile, we (and I-PEX) highly recommend using an IPEX MHF4L 90609-0001 tool to remove the antenna connectors from your old wireless adapter, and push the connectors onto your new adapter. This will avoid the nightmare scenario of the connectors breaking off of your old wireless adapter and getting stuck in your antenna leads. It also makes the whole job significantly simpler. If you are unable to obtain such a tool, be sure you pull the antenna leads straight up off of the connectors, to avoid breaking the connectors off of the card. 

Q: My machine has 3 antenna leads while the 1550 only has 2 connectors. Will it work?
A: This will depend on what each of the 3 antenna leads for your specific machine are connected to. You will need to refer to your specific machine's service or teardown manual for that information.

Q: Are there Windows 7 or 8.1 drivers for the 1550?
A: No. The Killer Wireless-AC 1550 requires Windows 10.

Q: The Killer Wireless-AC 1535 advertises 5 GHz range extending. The 1550 does not. Does this mean that the 1535 has better range on 5 GHz than the 1535? 
A: In some cases, this is possible! The 1550 is a 160 MHz card, while the 1535 is an 80 MHz card, so if the wireless access point is a 160 MHz radio, the 1550 will definitely outperform the 1535. However, in 2018, there are still very few 160 MHz access points, so it is possible that the 1535 will have better range due to its range extending amplifiers. 



Do I Need To Configure The Killer Control Center?


Do I Need To Configure The Killer Control Center?

Other than running the speed test, which should be done whenever the user is able to minimize other network activity, the Killer Control Center runs very well as a background application with no user input whatosever. Note that the Killer Control Center will ask for a new speed test for each new network connection. This is normal, and it will save the results for each individual network until the Killer Control Center is updated. The reason for this behavior is to get an accurate reading for the maximum allowable bandwidth from each network, as each network will have different limits. 

The Killer Control Center will run in the background and prioritize latency-sensitive applications, and throttle bulk downloads when you are at your maximum bandwidth on its own, without user interaction. It does this based upon a set of predetermined rules, which we update from time to time. The rules do not automatically update, but unless the user plays a lot of very cutting-edge games, or uses many newly released applications, these priorities do not fluctuate often.

The user can update these rules by updating the suite itself from the website, or by clicking ​Download Latest App Priorities​ in the Settings window in the Killer Control Center. However, we update the Killer Control Center often enough that it's probably best to just grab the latest suite from here -​ - so that the user also has all of the latest drivers, as well as adjustments for any Windows Updates. The user can also manually change the priorities in the Killer Control Center at any time. 

How Do I Use The Killer Prioritization Engine In The WRT32X?


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In order to use the Killer Prioritization Engine, you must be using a PC with a Killer network adapter installed, running the latest Killer Control Center. Killer network adapters come preinstalled in many gaming laptops and mainboards, and are not available for sale separately. 

Consoles cannot make use of the Killer Prioritization Engine, or the Killer Control Center, but they can be prioritized in the router's interface. 

For further support on other features of the WRT32X, please contact Linksys support. 

Killer Network Adapters and KRACK Exploit


Killer Network Adapters and KRACK Exploit

We are aware of the current concern involving the KRACK vulnerabilities in WPA2-PSK Wi-Fi encryption.

All of our current line of network adapters are fully supported only on the current versions of Windows operating systems (Windows 10, 8.1, and 7). As this is a GTK Key exploit, our users are largely safe, as Microsoft has already patched these operating systems to address the issue (, and the operating system is the primary key handling layer.

Ad-Hoc and Hotspot Functionality with Killer Adapters in Windows 10


Ad-Hoc and Hotspot Functionality with Killer Adapters in Windows 10

You may wish to create an Ad-Hoc or Hotspot network with your Killer Adapter on your Windows 10 machine.

With Windows 10, all Ad-Hoc and Hotspot functionality has been officially moved away from the drivers, and into the operating system itself.

If you would like to create a Hotspot or Ad-Hoc network with Windows 10, you simply need to click Start, type Hotspot, and press Enter. All of the relevant settings for your Hotspot network will be on that page.

Hotspot Settings
With Windows 10, this is the current official limit of Hotspot or Ad-Hoc functionality.

The Windows 10 version of our driver does not support the "Hosted Network" feature because Microsoft's own WDI driver does not have support for this. Microsoft is having all wireless vendors move to the WDI model, thus this feature will not work on Windows 10 drivers until after (and if) Microsoft expands support for SoftAP/Wi-Fi Direct.

In the meantime, if you need this feature back for certain older applications that made use of their own Hotspot or Ad-Hoc features, you can load the Windows 8.1 drivers via Device Manager from our INF download. We have verified that this works, and have had confirmation from other users as well.

However, we cannot guarantee that Windows Update will not automatically update these drivers, or that they will work flawlessly with Windows 10, as they are, after all, Windows 8.1 drivers. Use Windows 8.1 drivers in Windows 10 at your own risk.

Buying and Installing Killer Network Adapters


Buying and Installing Killer Network Adapters

Unfortunately, our current line of network adapters are currently only integrated into motherboards and laptops of various manufacturers and not sold as individual units. This is due to different regulatory and system calibration requirements. We apologize for the inconvenience.

You may find that our wireless adapters do show up online for sale from time to time. These are not authorized for resale by us, or any authorized manufacturer, but are being sold as components removed from other machines. Be sure to keep that in mind when purchasing. We can only support adapters that are obtained in this fashion in a very limited capacity.

Also note that many laptop manufacturers use hardware IDs to lock out non-authorized Wi-Fi adapters, so swapping in another adapter may not be as simple as it seems.


Will the Killer Prioritization Engine in the WRT32X Help Consoles?


Will the Killer Prioritization Engine in the Linksys WRT32X Help Consoles?

No, but it won’t hinder them, either. The Linksys WRT32X is an otherwise fully featured router, which also includes the ability to work with the Killer Control Center’s network prioritization features, and thus requires that any machine using this feature use a Killer Network Adapter. The router also features the ability to prioritize non-Killer devices using three levels – default, low priority, and high priority.

You can learn more about the router on Linksys’s website here -


Can the E2500/E2400/E2200 Be Used Wirelessly?


Can the E2500/E2400/E2200 Be Used Wirelessly?

Users have asked if the E2500, E2400, and E2200 can be used wirelessly. These are Ethernet adapters, so they cannot be used wirelessly. They require an Ethernet cable to be connected to your machine, and to an Internet gateway, such as a modem or router.

Your machine may also come with a wireless adapter, which may or may not be a Killer Networking adapter. If the wireless adapter is not a Killer Networking adapter, the Killer Control Center will report "No Killer Network Interfaces Connected" when you are connected to the Internet with only the non-Killer adapter. This is normal, as the Killer Control Center can only be used with Killer Networking adapters. 

The Killer Control Center versus The Killer Network Manager


The Killer Control Center versus The Killer Network Manager

The Killer Network Manager is our older, outgoing network prioritization suite.

The Killer Control Center is much more optimized for current builds of Windows 10, and even some security changes to older versions of Windows, and will be the only performance suite that will be updated going forward.

As Microsoft continues to make changes to their operating system, the Killer Network Manager will become less usable. We recommend all users switch to the Killer Control Center as soon as possible, regardless of which software their machine originally shipped. The best course of action is to download the latest Killer Control Center, found here - - then, in your Apps and Features menu, uninstall any Killer Drivers or Killer Performance Suite entries that you see, restart your machine, and then run the installer for the Killer Control Center. If you encounter any issues, you can contact support at


Do I Need The Killer Control Center?


Do I Need the Killer Control Center?

The Killer Control Center is the program that examines your applications, and sets priority so that your most speed-critical applications get first access to your bandwidth. Without it, every application that uses your Internet connection gets equal treatment, which can cause noticeably slower speeds.

For example, say you are playing a data-intensive game, also streaming a YouTube video, and downloading a large file. Without the Killer Control Center, your game might have issues as it has to share its bandwidth equally. With the Killer Control Center, the game will be given all the bandwidth it wants, while the video is slowed (which just means it'll likely buffer a bit more to start, and then work perfectly), and your download is the lowest priority.

Will the adapter work without the Control Center, running only the .INF version of the drivers? Certainly, but you are missing out on its most important features!

In summary, if you want to make the most of your Internet connection, you will want to use the Killer Control Center.

You can get the latest version of our driver, bundled with the Killer Control Center, here:


Do Killer Network Adapters Support Link Aggregation/NIC Teaming?


FAQ: Do Killer Network Adapters Support Link Aggregation/NIC Teaming?

Link Aggregation is not supported with any Windows consumer platform. In order to use Link Aggregation, you must be using an Enterprise grade router with this capability, and a Windows Server Operating System. However, the Killer Control Center is capable of using multiple Killer Network Adapters at one time with Doubleshot Pro and Doubleshot-X3 Pro which, for gaming, is even better than Link Aggregation, as the Killer Control Center can make use of Wi-Fi and Ethernet at the same time! You can read more about Killer Doubleshot Pro here - and Killer Doubleshot-X3 Pro here -


Resetting Your Network Stack: An Explanation

Some users have requested an explanation as to why they should reset their network stack. They want to know what the commands do, and that's great! We love users that want to understand how stuff works. Following is each command in the Windows stack reset, and an explanation of what it does. At the bottom of the article, you can find references for terminology, and further reading. 
netsh winsock reset resets the Winsock protocol, which is what Windows uses to interface with the TCP/IP stack. There are very few ways to manually configure this, yet it is possible for it to get corrupted, so resetting it is always a good first bet. This can solve issues that prevent a machine connecting to a router.
netsh int ip reset resets your machine's TCP/IP settings. TCP/IP is the standard your machine uses to connect to any other machine, locally or on the Internet. These settings are usually fairly generic, so resetting them is harmless, but if they are corrupted, it can cause problems, such as inability to connect to certain routers.
ipconfig /release tells your computer to release the IP (Internet Position Address) it is currently using, and also instructs the router to disassociate the IP with your machine. If the router has any hung resources connected to the IP, this can free them up. 
ipconfig /renew is necessary to regain an IP after the previous command. You could accomplish the same thing by restarting the machine, but some routers seem to prefer this method, and will not hand out an IP otherwise.
ipconfig /flushdns clears out your DNS cache. DNS = Domain Name Server. DNS is how computers turn names into numbers -- web addresses into IP addresses. When you type into your browser and press Enter, your computer actually accesses a sort of phone book (DNS server), looks up the IP address for, then navigates to that IP address. It will then cache this information so that it doesn't have to spend the time looking it up next time - it will just go straight to that IP address, without touching the DNS server. If, somehow, this information is wrong (websites move and cache files get corrupted) clearing this cache can be helpful. Worst case scenario, it runs microseconds slower because it has to look up and re-cache those DNS addresses again. In days past, this delay was far more noticeable than now. 
Terminology and further reading: (warning: these sites lead to external websites)

What Is A "Killer Enabled Device?"


What Is A "Killer Enabled Device?"

A "Killer Enabled Device" is any computer that is connected to the Internet using a currently supported Killer Networking adapter. These adapters can be found installed in gaming laptops, desktops, and mainboards, manufactured by various well-known and respected names in the computer industry. If you are looking for a Killer Enabled Device, then you are looking for a machine, or motherboard, with one of these network adapters. Currently supported adapters include:

  • All Killer Wireless-N Wi-Fi adapters
  • All Killer Wireless-AC Wi-Fi adapters
  • Killer E2200, E2400, and E2500 Gigabit Ethernet Adapters

If you have such a device, and you are connected to a router, such as the WRT32X, and it is not recognizing your adapter as a Killer Enabled Device, then you may need to update your Killer Control Center. You can find the latest version of hte Killer Control Center here - If you have any issues updating your suite, you can find troubleshooting steps here -

Why Does My Bluetooth Say 4.1 Instead Of 4.2?


Why Does My Bluetooth Say 4.1 Instead Of 4.2?

Some users have noted that, in Device Manager, the Bluetooth device is listed as Bluetooth 4.1 instead of Bluetooth 4.2, even though their Wi-Fi adapter supports Bluetooth 4.2. This is not an error. 

The hardware itself does support Bluetooth 4.2. However, Windows 10 does not. You can read here where Microsoft lists its Bluetooth support for Windows 10:

Have a question about your Killer product that isn't answered in our Knowledge Base?  Contact Us.