Only 100 Mbps performance observed with CAT5E cable
Only 100 Mbps performance observed with CAT5E cable
Previously mentioned, if Gigabit isn't listed under Speed and Duplex, it's likely there isn't Gigabit Ethernet. The fact that ASUS refers to it as a "LAN Jack" instead of specifying the speed is quite confusing. Moreover, usually Realtek Gigabit NICs will actually label themselves as GbE or Gigabit in Device Manager. I’m aware my device is named Realtek PCIe GbE Family Controller. You might be able to determine the exact chipset by checking the Details section and searching for Hardware IDs in the Property list.
It looks like a fairly new laptop with gigabit connectivity. Could the cable be the issue? There are likely four pairs inside, though possibly only two. The colors are blue, brown, green, or orange. It might be a faulty unit as well. Is your modem a fiber optic one? The site mentions it supports a 1000Mbps connection.
It seems the device is actually the F600 model, matching the site description. The F600 supports a 1000Mbps connection as well. The modem listed here appears to be labeled as F660, but its features align more with F600.
The information provided indicates your system uses a specific PCI controller version. For optimal compatibility, check the manufacturer’s recommendations for your laptop model. If unsure, consider downloading the official driver from Asus or a verified source that matches your device type.
The Realtek 8136 functions as a Fast Ethernet (100Mbit) adapter, not a Gigabit one. The 'FE' in the name indicates this specification.