@RogerH 

Hi Roger,

it really depends.  1st cables need to be rated at 10/100/1000 or Gigabit.  The cable between the modem form your provider to the base unit espcially.  if its rated lower you of course will not get gigabit speeds.  With you listing 450 and 650 i do not think that is an issue.  he Theoretical maximum of the 5GHz in this router is 867 Mbps and for 2.4GHz it is 400 Mbps.  This is where the AC1300 comes from.  So on wireless even if you are in a prefect enviroment you will not see Gigabit speeds.  The speed is dependent on the adapter in the device connecting to the network.  Like our Deco, each adapter has a maximum theoretical connection rate.  In testing we saw an average of 600-700 mbps on 5GHz.  on 2.4GHz about 150-200 Mbps.  A good rule of thumb with wireless is cut the connection rate in 1/2 to get your internet speed rate.  If your connection rate is 1000 Mbps then network speeds will be around 500 Mbps.  While you are likely to see a bit more than half, depending on the device you should at the very least get the 50%.  This is true with any router, as connection rates always depend on the capablities of the router and of the client device. 

Wired should absolutely get 1 Gbps though.

Best Regards 

@RogerH 

Ok, I missed that in the frist message, sorry about that.  I would start with removing the switch.  Any time there is a device added to the chain it can create a potential lag point.  with in that device or the cable that connect it to the next on in the chaing.  After that another thing to look at is cable legnth.  If you for instance are using a 10-foot cable but only need a 3-foot cable you are bassically sending your data through 7-feet of unneeded cable.  This can also be a potential lag point for your data.  

Best Regards 

@starmanj 

Actually yes there. and cable legnths and extra devices can cause potential issues.  You are correct in a theoretical sense the use a 3-foot and 10-foot cable should be the same, I used those legnths as an example by the way as we do not know the legnth that Roger is using.  However the longer data travels the more susceptible it is to external interference sources, such as lamps, TVs and other major appliances.  Also the longer a cable the more likely you to have damage which can also affect performance.  

As for the switch it can absolutely cause network performance issues.  Any time you route data through another device it takes longer for the data to reach your client device or the router and the internet.  you are also adding additonal cable segments which as already described above have potential to cause issues.  The frist rule in networking is to always check the phyiscal frist.  So check the cables remove the switch and move on from there.