Improving Comcast modem signal

@steakster is right.

I misread and answered your question thinking you had an issue with your home router. For a cable modem, it has to be compatible with Comcast and that its mac address must be registered with them.

I had done the same thing with an Arris modem I had, before I switched over to business service with Comcast. It is more expensive but business service gets higher priority and better customer service over normal residential service.

@classdstreamer 

It is extremely unlikely that a PC, even one of the fastest ones, will ever outperform a well designed modem/router.  Those devices employ special purpose hardware which utilize TCAM lookups at hardware speeds and encrypt/decrypt hardware, which no PC is ever likely to match, unless the said PCs also have them, which i have not seen any of yet. 

@chungjh 

That may actually be your best option. 

@classdstreamer

I understand where you are coming from. Regardless, in most enterprise level (and hi end) home routers and switches, CPU speed does not matter that much. CPU maintains the ’control plane’ and programs the specialized switching hardware. Once that is done, CPU is not even involved in the switching. İt gets out of the way and lets the hw do the packet forwarding. So the CPU speed by itself is not that significant.

The speed limits you are experiencing are 99% of the time, the limitations of your service provider and not due to your home router. İt is extremely unlikely that your PC will saturate a hi end home router, especially if you are using a wired connection  

I had a 600 mbit residential service which i upgraded to a 200 mbit business service and i now get much better performance. It had nothing to do with my home router but all due to the change in service by Comcast.

I am not sure where you are located, but where i live in Silicon  Valley, Comcast service is excellent.  On average, it went offline only for about 4 hours in one year.  And since i converted to their business service about two years ago, it never went offline. 

@chungjh 

Where are you located ?