N600 - C3700 Speed issue

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dazechar wrote:

I have a Dell Inspiron 5000 series 15 5567 which has Ethernet 10/100 Mbps Ethernet controller integrated on system board Wireless.  The WiFi 802.11ac + Bluetooth 4.2 • WiFi 802.11b/g/n + Bluetooth 4.0.  The cable is a CAT6.

 

At my neighbors is was able to get a WIFI speed of 233 mbps on a Spectrum modem which is 200 mbps.

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A. we don't know what spectrum router your neighbor is using so you can't compare wireless speeds. You've got a AC wireless card in your laptop but you don't say which one, I'll go into more later. 

B. The N600 router isn't going to saturate a 200mbps connection. the rough rule of thumb (again, rough) is a 55% throughput speed in comparison to link rate. A N600 device is going to connect at maximum 300mbps/band. that's a max throughput of 165mbps. Again, roughly. And that's not saying the wifi card you're using is a 2x2 antenna card or 1x1. Intel has both with those specs. A chipset model would tell us but not the specs you posted. If you're a 1x1 antenna setup then your maximum wifi speed (roughly) is 83mbps over wireless on a N600 device. 

C. your ethernet controller is a fast controller which means its speeds are 10/100mbps. That's not going to max out your connection either. roughly 90-95mbps max.  

I'd try borrowing a laptop with a gigabit connection and seeing if the modem/router is getting full speeds. Your connections look good by the modem pages but the device you're testing with and the wireless technology in use is going to be the limiting factors.