I just upgraded from 100mbps to 500 mbps internet. All three of my Roku's have always tested at 85-95 mbps previously. Since upbrading my internet the tested speed on the Roku's has not changed, still between 85-95. Testing my speed on my pc's is 460+ mbps and wireless is at 300+ mbps. Although I dont have a streaming problem with the Roku I'm just wondering if this is a Roku hardware limitation or something else.
Your suspicion is correct. Roku uses "Fast Ethernet" 10/100 Mbps ports, not "Gigabit Ethernet" 10/100/1000 Mbps ports. High 80's/Low 90's is about all you can squeeze out of a 100 Mbps connection. This is more than adequate for streaming a single stream at a time over the internet.
The Roku devices (when wired/using ethernet) are capable of Fast Ethernet. (max transmission rates 100 mbps).
If you connect wirelessly/wifi to your Ultra and other ethernet capable Roku devices, you should see the higher speeds of your new internet reflected. (Settings/Network/Check Connection)
----
As a sidenote, assuming you meant Premiere+ (4630), rather than Premium+.
We’re upgrading Roku Community to bring you a faster, more mobile-friendly experience. You may notice limited functionality or read-only access during this time. You will not be able to log in or post new comments or kudos during this time. Read more here.
Planned Downtime:
Community will be unavailable for up to 24–48 hours during the upgrade window during the week of May 12 and you may notice reduced functionality.
In the meantime, for additional assistance, visit our Support Site.
Thanks for your patience — we’re excited to share what’s next!