@Flick41611 

Frist thing to check would be your linkrate on the PC.  Additionally what is the type of Ethernet on the PC is it 10/100 or 10/100/1000?

  @Carl Thanks for the reply. I'm not sure I understand exactly what you are referring to by the link rate on the PC.

I believe I confirmed that the ethernet port is 10/100/1000. I did this by going to Network Connections > [Ethernet Port Name] > Properties > Configure [Ethernet Port Name] > Advanced > Property: Speed and Duplex > Value: [Confirmed it is set to Auto Negotiation, and options are in the list for 10mbps, 100mbps, and 1gbps].

  @Flick41611 

Open your PC's network and sharing center.  Click on Change Adapter Settings.  Right-click on Ethernet and click on Status.  The linkrate is listed as Linkrate or Speed.   

Note:  I am not using ethernet on my PC so Wireless is used as an example. 

  @Carl 

Got it, thanks. It is listed as "Speed" for me (same as your screenshot), so the terminology threw me off.

I am currently at work, and connected to my work's network. While here, my speed/linkrate is 1.0 gbps. Once I am home later and able to connect to my home network, I will double check and confirm the linkrate from there.

Question: is it possible for the linkrate and measured internet speed to be different? In other words, could I have a link rate of 300mbps, but a measured internet speedtest of 90 mbps? Or will those measurements generally be the same?

Also, I presume your line of questions was to confirm whether my computer is physically capable of handling a higher connection speed, and it appears that it is.

  @Flick41611 

On Ethernet, not likely.  Ethernet's link rate and internet speed are typically the same.  There isn't much that affects Ethernet speeds.

On Wireless yes, absolutely.  in fact, wireless internet speeds can be as much as 50% less than the link rate.   There is a lot that can affect internet speeds on wireless, such as band, distance, interference, and load.