My download speeds aren't what they used to be!

A few days ago my Netgear router stopped working. So, I purchased a new one. It is the Netgear WNDR3400v3. My laptop is hardwired to the router. After setting everything up and running a speed test, I noticed that the download speed was only 70 Mb per second. Typically I get over 100 Mb per second.

My router is connected to a cable modem which was provided by my ISP (Spectrum). If I connect my laptop directly to the modem, the download speed exceeds 100 Mb per second.

I've seen information on the Internet suggesting that my router does not support download speeds that high. Netgear recommended changing the MTU. That didn't work. Yet another post I read recommended disabling IPv6. I haven't figured out how to do that on my router.

The fact that I can get full download speeds when connected directly to the modem implies that the router is the problem. I have opened a support ticket with Netgear, but I was just wondering whether anyone in the Experts community had any ideas.
babyb00merAsked:
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masnrockCommented:
Your old router is better than your new one. The 3400 isn't gigabit (whereas the 3700 is), so that's an automatic loss in speed you're going to experience right there. Return the 3400 and buy a router that's better than the 3700 you had before. I don't know your budget, but I'd consider one of the Nighthawk units, such as the R6700.
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JohnBusiness Consultant (Owner)Commented:
I cannot find out what the internal throughput is for this router. I need 800 - 900 mbits/second internal throughput to get full speed on a 100 mbits/second connection. Ask Netgear support if this router supports the high modem speed you get.
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JohnBusiness Consultant (Owner)Commented:
On this page:  http://netgear.support/n-routers/

they talk about throughput speeds of 500 mbits/sec for a WNDR3700v1 which I think is a faster router than you have.
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RaminTechnical AdvisorCommented:
What is the distance between your modem and the router ?
Did you try with another cable ?
Is it a good quality cable?
Try with 1 to 2 meter cable and retest.
Try to factory rest your modem and retest,
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David FavorLinux/LXD/WordPress/Hosting SavantCommented:
http://www.downloads.netgear.com/files/GDC/WNDR3400V3/WNDR3400v3_UM_19June2014.pdf says your modem supports 802.11n + 802.11g via WiFi.

You said you did a direct connect to your Netgear router. Clarify what this means.

Normally I think of a direct connect as an Ethernet cable, which should provide you with same speed as connecting to your modem Ethernet connection.

For me, if I acquired a router which dropped speed over a direct connect (Ethernet cable), I'd return the router.

Take Ramin's suggestion too. Try a different cable + if your speed jumps up, cut the cable in half + toss it.

Bad cables are an ugly matter.
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babyb00merAuthor Commented:
they talk about throughput speeds of 500 mbits/sec for a WNDR3700v1 which I think is a faster router than you have.

Yes, it's unfortunate. It was a 3700 that I'm replacing with 3400. I should have checked to see what the differences were.
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JohnBusiness Consultant (Owner)Commented:
The one that stopped working is just over half as fast as what I have now.

Ask Netgear Support if there is a firmware upgrade that may help a bit.

Otherwise you may need to get another router which is faster.
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babyb00merAuthor Commented:

You said you did a direct connect to your Netgear router. Clarify what this means.

Normally I think of a direct connect as an Ethernet cable, which should provide you with same speed as connecting to your modem Ethernet connection.


Not correct! What I said was that my laptop is hardwired to the router. My use of the term, hardwired, was intended to imply the use of an ethernet cable. In the paragraph that followed I explained that my router is connected to the cable modem provided by my ISP. So, the laptop is connected to the router with a cable, which in turn is connected to the modem with a cable, etc. The cable modem does not incorporate Wi-Fi support, so the only way I can connect the laptop to it is with an ethernet cable. Nothing I've described in this discussion has anything to do with the router's Wi-Fi performance – although that's less than stellar as well.

I agree that, ultimately, I will have to replace the router. I don't believe it's a setup issue. Instead, I should have reviewed its specifications more carefully. It's just that in 2017 it didn't occur to me that it was possible to buy a router that wouldn't support the latest standards.
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Olgierd UngehojerSenior Network AdministratorCommented:
Connect your computer to modem and check what speed you have without router. If speed is ok connect your computer by the router and login to configuration panel. On the second tab check speed again, then disable firewall and check speed. if you will have better speed without firewall it is mean that your CPU in your router use 100% and you will have maximum speed around your result because router cannot handle more speed.  If you will have no difference in speed that's mean that your computer has problem or speed test server what you choose is slower than your connection.
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babyb00merAuthor Commented:

Your old router is better than your new one. The 3400 isn't gigabit (whereas the 3700 is), so that's an automatic loss in speed you're going to experience right there. Return the 3400 and buy a router that's better than the 3700 you had before. I don't know your budget, but I'd consider one of the Nighthawk units, such as the R6700.

I'm afraid you are right. It was an impulse purchase. I was in a hurry to replace the defective router. Shame on me for not exercising due diligence! I'm going to take this one on the chin, because I can no longer return the new router.
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babyb00merAuthor Commented:
I've found a Linksys – Max-Stream AC1750 at Best Buy for $110 (marked down from $130). It's advertised as a gigabit router.
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JohnBusiness Consultant (Owner)Commented:
I saw a comparison table for that group of routers and the internal speed was 300 mbira/second. Probably not fast enough. What about the. Netgear 3700 that you had and said was fast enough ?
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babyb00merAuthor Commented:
Eventually, Netgear admitted that the modem I purchased (WNDR3400v3) is not a gigabit router and cannot keep up with my cable modem. In other words, it's not fast enough to support download speeds at or above 100 Mb per second.

Just for the record, I did not ignore recommendations from the other experts. All of the tests and/or configurations they suggested had been tried prior to posting this question.
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JohnBusiness Consultant (Owner)Commented:
Thanks for the update.
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babyb00merAuthor Commented:
Ultimately I went with a Linksys model EA6350, which is an AC1200+ dual-band Smart Wi-Fi gigabit router. I found it for under $100 at Fry's Electronics. My guess is that any gigabit router would have solved my problem, but I found this one at the right price.

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