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Zoom (or Team) slows down internet speed by 30 times

Forum|Forum|2 years ago
June 6, 2023
17 replies
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Oct. 11, 2023

Seeing more responses on the issue, I updated my original message to make it more useful.

Problem:

On my Windows 11 laptop (Lenovo ThinkPad, E495, ethernet wired connection), when I start Zoom (even without signing in, same with Microsoft Team), the internet speed test shows a 30-times drop, from 450 Mbps to ~10 Mbps.

Temporary remedy:

After your Zoom session, QUIT Zoom (or Team) COMPLETELY so your internet speed is back to normal. You make sure this by clicking the "Show hidden icons" arrow at the bottom-right of your screen to see all the applications running and exit Zoom if it is still there.

Attempted fix. It worked briefly for an earlier version of Zoom, but does not work anymore (after Zoom version evolution) as of Oct. 11, 2023 :

1.) Search for the "Control Panel" and open this up.

2.) In the window that comes up, click on the "Network and Internet" link

3.) In there, there will be a link that says "Internet Options", click on that to get another pop-up window

4.) In that pop-up window, towards the top, look for the tab that says "Advanced" and click on that

5.) Scroll to the bottom of that window, look for where it lists "Use TLS", check "Use TLS 1.3", and uncheck "Use TLS 1.2".

Also tried Google Meet. Although the network speed test shows no issue, all applications become slow and lagging. It is worse than Zoom -- even the slowdown-plagued version.

Best answer by gweeks

Like many on this thread, I performed this "fix" (among many others) to address this issue. It worked initially but the problem returned. However, I found one more thing that's worth trying for those with a Lenovo that seems to have worked (fingers crossed). I have a Thinkpad X1 Carbon Gen 8.

Open the Lenovo Vantage app
Under Device Settings, select "Performance Boost" (Zoom was listed as one of the "Apps to boost")
Turn off Performance Boost

I hope this helps some folks. This has been the most frustrating computer issue I've faced.

D

debdaufeldt

Newcomer

I have this exact same problem! It started about 2-weeks ago. Unfortunately, this "fix" did not work on my Windows 11 ThinkPad. I've invested countless hours and tried everything I can think of. My ISP, Xfinity, says it must be a Zoom problem. Please, please, please, I'm on Zoom all day for work. Does anyone have a fix? Thanks!

G

GuipingAuthor

Newcomer

Microsoft Team also caused a slowdown, so it may be a common module that video calls all use. The fix I posted worked for me -- occasionally, the slowdown comes back, then I restart the Windows to get the speed back.

M

Marinus

Newcomer

Thanks, this seems to work for me as well in teams as well. My internet was dropping from 500mbps to 300mbps as soon as I load teams or zoom

D

Danielhn

Newcomer

Does anyone have any updates on this? Every time I even open the Zoom app, my connection goes from 250mbps to like 8mbps.

G

GuipingAuthor

Newcomer

Unfortunately, no. The slowdown remains.

I have come back to using Zoom -- even with the slowdown, it is better than Google Meet.

F

Flyfisherman

Newcomer

I have the same issue. Its been haunting me for 4 months now. (right after my warranty expired from Lenovo). The internet speed drops when I use wireless and wired ethernet for just this PC. I drop from 900+MBPS to 7 or 8MBPS. Only restart enables higher connectivity speeds. The common thread starts with my zoom meetings and then speed drops afterwards. I also get DCOM warnings and Errors, but don't know what to do with them. HELP!

G

GuipingAuthor

Newcomer

Sorry, I gave up trying to resolve it.

This may be helpful: After using Zoom or Team, I make sure to exit them completely so my network speed is back to normal.

S

Sarah1S1

Newcomer

I am having the same problems - super fast internet of ~800mbps drops to about 5mbps. I tried the original solution, didn't help. Lenovo installed a new motherboard, didn't help. Multiple emails with Zoom support, no help.

Thanks to this recent comment I have tried QUITTING zoom after each call, and speed is restored immediately, so at least I'm no longer having to restart my computer. However, the problem persists on every call. Did try disconnecting computer audio, that didn't help.

I don't have a Dell, so that bandwidth option isn't available to me.

I sent this thread to the Zoom support ticket, we'll see if anything comes of it. So far they insist it's not their problem.

P

PixelManagement

Newcomer

I, too, have just found myself in the same boat, both Zoom and Teams are giving me the same issue: speed test results are way down at speedtest.net and fast.com after connecting to a meeting.

I did find something interesting while using my personal room for troubleshooting:

Disconnecting computer audio from a zoom meeting restores my normal internet speed.

(zoom menu bar -> mute (up arrow) -> Leave Computer Audio)

The results from that action are immediate.

Normal speed (700 Mbps+)

Connected to Zoom (12 Mbps)

Leave Computer Audio while still connected to the call (700 Mbps+)

I am on Windows 10.

Here's are some of the troubleshooting steps I've taken so far:

1. Switch audio drivers

2. Run zoom in admin mode

3. Set zoom to use high-performance mode in the Graphics Settings in the Settings app

4. Tried two different 1Gb NICs, one 10Gb nic, and wifi

5. Changed DNS server

6. Tried the original suggestion provided by Guiping

7. Disabled the Windows Auto-tuning feature

I know I've done more but I am in the middle of (still) troubleshooting. This is an annoying bug.

Has anyone else tried anything not listed above?

P

PixelManagement

Newcomer

OMG!! Think I just found the issue on my PC.

Anyone using a Dell? I am.

I found a setting in the Dell Optimizer app that is the cause of the bandwidth throttling.

Toggling this setting during an active speed test affects the bandwidth in real time.

Wow.

I hope this helps someone else!

S

Sw4rsw4r

Newcomer

Great work! It works for me! Thank you so so so much!

G

gsandeep2023

Newcomer

Hi All .. I am facing the same issue and haven't found any solution yet. I see comments from community but I don't see any solution or posts from Zoom.

Zoom, please respond and help. This is a big issue and unacceptable silence from Zoom.

HELP!!!

P

PixelManagement

Newcomer

Hi gsandeep2023,

Are you using a Dell, by chance?

Does your speed return to normal if you disconnect computer audio in the zoom room?

G

gsandeep2023

Newcomer

Hello ... thank you for the response. I just find out about this thread today only and will try that option today. I have this issue for last 4-5 months and I thought its something on my computer but it always happens on Zoom screen share and video share.

G

gsandeep2023

Newcomer

Hello .. thank you for responding. I am on IBM Lenovo. I came to know about that setting today only so I will try that. I will also try the suggestion of TLS 1.2 vs TLS 1.3. But I have this issue for past 4-5 months and I tried moving my laptop all over the place, even next to modem and it still gives me issues. It only happens when I am on zoom sharing the screen and video. After few minutes on the call, my internet speed drops from over 400/400 to 15/16 and I start seeing major lags between screen sharing and video feeds .. like 3-4 second lag

I will check all those suggestions but wondering if Zoom have a comment on that

F

Flyfisherman

Newcomer

I have the same problem on Lenovo and same timeframe for problem. Internet connection speed goes from 900+MBPS to 7-8MBPS until restart. It happens in both wireless network and ethernet connections. Did you find anything else? Its driving me crazy.

G

gsandeep2023

Newcomer

nope, no luck so far .. now what I do is restart Zoom after every meeting, get rid of dual monitor option, reduce the number of current processes, don't go on video if not required and pray that the issue doesn't pop up in the middle of my sharing. I am on the latest version of zoom also so its up to date from my side. I thought of using the mesh wi-fi system but I dropped that idea because I still see the issue when I sitting right next to my latest eero modem 😞

F

Flyfisherman

Newcomer

Some additional details. I performed Speed test before, during and after a zoom meeting. Before and During Speed Tests showed ~940+MBPS Down and 40MBPS Up.

AFTER zoom meeting ends, I did a Speed Test and Got the usual drop to: 8.57MBPS Down and 5.15MBPS Up.

SO, this has been occurring for months.

I have updated drivers, changed zoom configurations, used wireless and wired ethernet options and still get the same results. Windows 11 Pro, Lenovo Yoga ThinkPad, Intel Graphics.

THEN, I restart windows and get the 940+MPBS down and 40MBPS Up until I conduct a zoom meeting again.

Any other suggestions? Do I need to do a Windows Restart?

F

Flyfisherman

Newcomer

More Updates and DEtails on this PROBLEM, but no Fix:

1. Made Zoom Phone call and Same Drop in Speed problem occurs! 900+MBPS to 5-7MBPS in addition to zoom video meetings.

2. Physical Network Speeds stay HIGH at 1GBPS Ethernet (wired) or ~750MBPS Wireless to Router while PC Speed test shows 5-7MBPS Down and ~3-4MBPS Up.

3. QUIT Zoom and Speed reverts back to High numbers for PC (900MBPS+). At least that is better than restarting entire pc.

4. Yesterday the quality of two zoom calls were untenable. Audio drops, video lags, etc. That just started happening (problem is worsening not improving).

5. Conducted an overseas What's App Phone call and Video today without a problem. Performed speed tests before, during and afterwards and no problems. Also, quality was very good.

6. Clarity: Using Zoom Client and Outlook Plugin. Windows 11 Pro. All Drivers up to date. All Windows updates completed.

7. Created Trouble Ticket with Zoom today... awaiting a reply.

S

Sarah1S1

Newcomer

You wrote: "2. Physical Network Speeds stay HIGH at 1GBPS Ethernet (wired) or ~750MBPS Wireless to Router while PC Speed test shows 5-7MBPS Down and ~3-4MBPS Up."
What is the difference between the two - how did you measure your "physical network speeds?" My speed TEST speed is very fast before Zoom, same as yours like ~750, then drops to ~5 with Zoom. Is the "physical network speed" different that the tested speed with a speed test?

F

Flyfisherman

Newcomer

This page provided several ways to check the physical speed of your connection. I have used this to check link/speed (speed between PC and Router) on my wireless and wired network adapters: https://www.makeuseof.com/windows-check-network-adapter-speed/

Hope this helps.

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