Question 1

Do all four Ethernet ports on this modem output the same amount of bandwidth or are there only certain ports that operate at maximum capacity?

Accepted Answer

The Motorola MB8600 cable modem I received in May of 2022 does not have four ethernet ports, only one.  I'm disappointed as having an extra port is really nice for troubleshooting with a directly connected laptop, bypassing the separate router between the MB8600 and the rest of the network.

Question 2

Does this use the now-notorious Intel Puma 6 chipset?

Accepted Answer

Model MB8600 and all Motorola products use Broadcom chipsets and do not have the problem associated with the Puma 6 chipset.

Question 3

I also need wifi, what do you recommend?

Accepted Answer

The MB8600 modem will work with any WiFi router.  Given the speed of the MB8600, you should be using at least an AC1900 router and given the other devices in your network, you might be able to take advantage of a wireless speed even faster than AC1900.The Ethernet port on the MB8600 simply plugs into the WiFi router of your choice.  The router should be current enough to have a Gigabit WAN port (10/100/1000 Ethernet port), since you will need that  for the speeds that the MB8600 can deliver.  And for now, 1 Gbps service is the fastest cable service Comcast is providing in the US.  When Comcast or other cable Internet  service providers begin providing service speeds over 1Gbps, the MB8600 has the bonded Ethernet ports which will allow the MB8600 to deliver speeds above 1 Gbps.  We are not aware of a consumer-home/small office router that does Ethernet port bonding today, but they are coming.  Ethernet port bonding is available on Enterprise level routers (routers used in large organizations), but we can't recommend that class of product for a consumer at this point.  They are more complicated than you need and more expensive.   Bonded Ethernet ports for consumers will appear by the time Comcast is ready to begin delivering speeds above 1Gbps and the MB8600 will be ready to deliver those speeds.In summary:                 Use at least an AC1900 wireless router                 Be sure the router you choose has a Gigabit Ethernet WAN port.

Question 4

What chipset is the mb7621 utilizing?  intel or broadcom or other?

Accepted Answer

Model MB7621 and all Motorola modems utilize the Broadcom modem chipset.

ASIN	B0723599RQ
Best Sellers Rank	#1,427 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #12 in Computer Networking Modems
Brand	Motorola
Color	Black
Compatible Devices	Personal Computer
Connectivity Technology	Cable
Customer Reviews	4.5 4.5 out of 5 stars (10,114)
Data Transfer Rate	6 gigabits_per_second
Internet Service Provider	cox, optimum, spectrum, xfinity
Item Dimensions L x W x H	7.25"L x 2.25"W x 7.88"H
Item Weight	31 g
Manufacturer	MTRLC LLC
Maximum Downstream Data Transfer Rate	686 megabits_per_second
Maximum Upstream Data Transfer Rate	1 gigabits_per_second
Mfr Part Number	MB8600-10
Model Number	MB8600
Modem Type	DSL
Number of Ethernet Ports	2
Number of Items	1
Number of Ports	6
UPC	042822162221 042822163204 855631006170
Unit Count	1 Count
Warranty Description	2 YEAR MANUFACTURER

Motorola MB8600 DOCSIS 3.1 Gigabit Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum | for Cable Plans Up to 1000 Mbps | 1 Gbps Ethernet Port

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