[SOLVED] Internet speeds are tanking as soon as I open a game, no matter the software company.

[Jon0917]

I've been having some issues with my internet. My internet speeds are at around 100 Mbps when I'm idling on my computer just watching a Twitch stream or a YouTube video. However, as soon as I open any video game on my PC, and this happens with any of the launchers, (Steam, Uplay, Epic Games, etc.) my speeds decline to around 2 Mbps which is really slow. In case it was a software issue, I've reset my PC but it hasn't solved anything.

PC Specifications:
GTX 1070
i7-7700k
AsRock Z270 Killer SLI/ac (which is what I use to connect to the Wi-Fi)
16 GB of Ram @ 2133
500 Watt power supply, EVGA Bronze
1 TB Western Digital
250 GB SSD

My modem is the Arris TG1682. I do not know the model of my router, but if it is necessary to solve this problem, I could go take a look at it.
So the AsRock Z270 Killer SLI/ac motherboard has two antennas on the back of it that allow me to connect to the Wi-Fi, and the speeds are great whenever I'm watching a Twitch stream, around 100 Mbps, but whenever I enter a Steam game, or Uplay game, or Epic game, and I run the internet speed test, I get around 2 Mbps download and the Twitch stream on my second monitor goes to 144p and buffers. As stated above, I have an EVGA 500 watt Bronze power supply. I'm running Windows 10 Pro 64 bit. My ISP is Spectrum internet. There are probably around 10 devices connected to the WiFi at the lowest and around 15 at max. I haven't been getting any error messages either.

 

[jsmithepa]

Rid of anything "killer."
Everybody knows their down speed, what is your up speed?

 

[Jon0917]

Rid of anything "killer."
Everybody knows their down speed, what is your up speed?

Could you explain what you mean by "Rid of anything 'killer'?"

My up speed is around 10 Mbps, and it has always been around 10 Mbps I believe. It's just the download speeds that have been dramatically changing. In fact, I did a test, and ran a game in offline mode. The speeds were still at around 2-3 Mbps, when I normally get 90 Mbps while idling on a Twitch stream. So I did another test. This time I ran the test while I was in a game, and I was getting around 2-3 Mbps, but then in the middle of the speedtest, I exited the game, and as soon as I did that, the speeds skyrocketed up to arounod 90 Mbps again. Any ideas what could be causing the issue?

 

[jsmithepa]

The Killer series of LAN adapters is a common complaint out on the Net, is a well known gripe. If you are not able to disable the NIC's Killer features, at least go into the Killer Control panel and play with the settings. Mine looks like it has some kind of bandwidth control. U may wanto Google this Killer thing, like I said a well known gripe.

Interactive gaming makes upload as important as download, if your upload pipe is congested, a big download pipe doesn't do u any good. So when this happens, look at upload pipe, is it maxed out? that would be a problem.

 

[bill001g]

I would test with a ethernet cable run over the floor if that is the only option. WiFi can cause all kinds of strange issues. The goal is to find out what needs fixing rather than spending time looking at the wrong thing. With games it can be really strange stuff like video driver settings that no other software uses. It just appears to be a network issue when it is not. Your first step is to isolate the problem as much as you can.

The killer drivers are known to cause very strange issue. They try to favor game traffic but seem to mess up their drivers all the time. It is completely worthless software because it can only prioritize between application on the machine itself it can do nothing about issues outside the machine and that is where almost all network issue occur.

Your problem may not be the killer stuff it just gets blamed because of its history of causing strange issues.