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sssaksena
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DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I've been seeing this in quite a lot of threads on the internet, there is an issue with the wifi module (intel dual band wireless-AC 3165) that DELL is using in its new line of laptops.

I have Comcast's 250mbps internet connection at home. I have several other devices (phones, tablets, chromebook) that get at least 40-50mbps with wireless connection (checked using speedtest.net app) but the new DELL laptop 5570 that I bought in January 2018 from DELL's website is only getting 1-2mbps download and 3-4mbps upload speed. Can someone explain whats going on and help troubleshoot this problem. I've reset the modem, checked it's firmware and updated the DELL system with all new updates. Wifi module driver is also up to date. 

I'm using DLink DIR 850L router. I hope I provided enough info. Please help.

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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I have the exact same problem, only on my Dell Inspiron 15 5570 is the WiFi super slow compared to all other devices here. Everything is up-to-date and test results were good.
I'm getting desperate.. Only thing I can think of is that the network card is either super bad or they put in the wrong one..
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I found the solution! finally!!!
I turned off SmartByte and my internet speed doubled!
Don't know yet if it will stay stable, but I think it will.

Hope it works for you as well!

All the best!

sssaksena
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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wow. just wow. I uninstalled this Smart(dumb)Byte application from my laptop and I'm seeing great speeds!

Doesnt surprise me that one of the DELL crapware caused all the problems and headaches.

Its insane.

Shame on DELL, they will never own up to such things. always try to blame the firmware or anything else they can point fingers at.

Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I feel you.. Happy it worked at least!!

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jphughan
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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Glad it's solved, but about the Intel 3165, although it's a dual antenna card, it only uses 1 antenna for transmit and 1 for receive (aka 1x1) rather than being able to use both antennas for each function when that would help.  If you have 250 Mbps Internet, you may want to consider upgrading to the Intel 8265, which supports 2x2 as well as 802.11ac Wave 2 features like MU-MIMO, so you may find that you'll get higher and/or more reliable throughput, possibly at longer range.  As of this writing, the Intel 8265 is available for $21 on Amazon.

jphughan
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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Follow up to my recommendation above.  I just looked up the specs of the DLink router you mentioned and it's only an AC1200 model.  That means the router can do two spatial streams, so upgrading to the 8265 in order to gain support for doing that in each direction might still yield some improvement there, but that router doesn't support Wave 2 features like MU-MIMO since that's fairly new and AC1200 is still fairly old.  Still, $20 on Amazon isn't a bad deal, and the swap itself would be fairly simple.

sssaksena
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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dude! you are awesome. Thanks for this info. I will definitely consider upgrading to 8265, good to know.

any recommendations for upgrading the router I have to take full advantage of 250Mbps on 5GHz band?

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jphughan
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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I use an ASUS RT-AC88U, which is an 802.11ac Wave 2 router capable of MU-MIMO and even 4x4 transmission.  Practically no devices actually support 4x4 (in fact only a tiny group even support 3x3), but the additional capacity allows it to provide solid support to multiple clients simultaneously, even when they're in very different areas.  I have a 300 Mbps connection and I can get full bandwidth from a room that's 2 walls and about 50 feet away.  I suspect if I had a way to test LAN throughput I could get much higher, at leas that's what the reviews suggest.  I'm also just a fan of ASUS routers in general.  Their high-end models like this one tend to get great range (I can get a usable signal outside my house, for example), and then all of their products benefit from the way ASUS does things in general.  Their configuration interface is nicely laid out and has a solid feature set (AND they support third-party firmware if you want to go there), they provide frequent firmware updates and continue doing so for several years compared to other companies where you might get 2-3 in the first year and then it's tough luck, and most importantly for me, ASUS routers in my experience are rock solid.  With both this router and my previous RT-N66U, I never EVER had to reboot my router to resolve any WiFi or Internet connectivity issues.  The RT-AC87U (not the 88U) had some issues on its 5 GHz band when used with certain client chipsets, and that was a problem, but that's because that was the only product where ASUS tried a Qualcomm chipset.  For the 88U they returned to Broadcom and all is well.

All that said, if you have a larger house, you may want to consider a newer mesh system.  Netgear's Orbi seems to rule the roost in that category.

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Re: DELL Inspiron 15 5570 WIFI VERY SLOW - Frustrating

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I have a brand new Inspiron 7373.   I work in IT.  I went through **bleep** troubleshooting this.  Dell support, driver reinstalls, tweaking network card settings, tweaking router settings.

Symptom:  Wifi would remain connected, however internet would drop intermittently. WIN10 troubleshooter reported issues with "detecting proxy settings".  Intermittent drops occurred around high bandwidth (80/443) browsing.  Could restore Internet connection inconsistently with reset, or sometimes with wifi drop & connect, or ipconfig /renew.  Odd symptom was that I was unable to browse to the modem config page outside the subnet when Internet dropped, but fully able to browse to the router config page.  ICMP would often work to the internet, modem and router despite 80/443 browsing not working.  

Solution: Uninstall Smartbyte application and Smartbyte Drivers from your Win10 machine.

100% resolution of issues.