Limited bandwidth available at 100Mbps over Gigabit LAN connection
Limited bandwidth available at 100Mbps over Gigabit LAN connection
I configured a home network to connect to my NAS. Two computers are hardwired to a TP-Link Gigabit switch, then to the Xfinity Gateway. The NAS is connected via the second Ethernet port on the Gateway, which also supports Gigabit speeds. All cables used are Cat6, with the longest being 50 feet, ensuring minimal signal loss. The NAS runs an Asus Z270 motherboard and an Intel i5 7600K processor, using its built-in Gigabit port. According to specs, the setup seems gigabit-capable. However, during a test transfer of media this morning, I only achieved about 100Mbps to the NAS. Could there be an issue with bandwidth or configuration? I’m hoping for sufficient speed for streaming 4K and music at the same time. Thanks!
Are you confirming the transfer is 100M bps instead of 100M bps?
When using mechanical hard drives, performance is constrained by their speed. To explore this, consider setting up a RAM disk or turning on memory caching on your NAS. You’ll likely notice performance spikes matching what your system can manage. TL;DR, the bottleneck is probably an HDD.
This observation is valid too—it becomes more problematic when handling several files simultaneously or copying numerous tiny files. In testing, I typically use one large video file of at least 1GB to assess performance.
I faced problems with my Buffalo device and the Seagate NAS, which was only transferring 15-25MB per second. After setting up a spare Windows machine with a shared drive, it overwhelmed my GB connection. Now I’m working on a custom ITX Freena box.
Examine the physical connectors closely and verify that the pins inside the jacks aren’t connected together. These internal pins tend to be flexible and seldom remain properly aligned, causing them to touch other pins within the same jack. Check your control panel for the network card status—ensure it’s operating at 100mbps or 1 gbps. Occasionally, transmission errors may trigger the card to revert to 100mbps until you manually adjust it to 1 gbps via Device Manager under Network Adapter settings. Occasionally, damaged cables or worn wires inside the Ethernet connectors can disrupt proper contact. For 100mbps, only four of the eight cable wires are required; for 1 gbps, all eight are necessary. Mechanical drives can exceed 100mbps, but 100mbps corresponds to roughly 12.5 MB/s. Many contemporary drives can handle over 125MB/s (1gbps), and today’s high-capacity drives may reach up to 260MB/s. When using Cat6 cables, some inexpensive options misrepresent the rating or substitute copper-clad aluminum wires (CCA) for standard copper—CCA wires are cheaper but have higher resistance, needing more power for long runs. A 50-foot run isn’t extremely far, but it’s still a concern. Some network cards come with “Energy saving” settings enabled by default, which lower transmission power. In rare instances, this can cause the receiving device to reduce its speed to 100mbps to maintain signal strength. You can turn these off in the Advanced settings of your network card or in Device Manager.
Thanks everyone for your feedback! It turns out I'm just as prone to forgetting things as my wife says. The last post highlighted the distinction between bps and Bps. I moved around 3TB of movies, with the smallest size being 800MB, and achieved speeds of roughly 110-120MBps—about 1Gbps. Wow! Appreciate all the help! Just two more copies left, and it's all done!