Customer Ratings & Reviews
See more imagesj5create - USB-C® to 2.5 Gigabit Ethernet Adapter, with 3.93" cable - Space Gray
- Model:
- JCE145C
- SKU:
- 6640675
Highly rated by customers for:
Customer reviews
Top Mentions
- Rated 5 out of 5 stars
want help go to BestBuy treat you like family .
cnote Posted
I'm a senior citizen with limited computer knowledge, wasn't aware of this part! I was ready to buy several cords I was told by store rep, that this was all I need to buy everything worked great problem solved!!
I would recommend this to a friend - Rated 5 out of 5 stars
Excellent product
Inuyasha783 Posted
Works great perfect for my desktop whos network card fried
I would recommend this to a friend - Rated 5 out of 5 stars
Great product
Visionmedia Posted
This little guy works like a champ and got me out of a lot of jams.
I would recommend this to a friend - Rated 5 out of 5 stars
Adapter worked great.
Keith Posted
I was able to plug it into my laptop and my switch to update my laptop when the wifi wasn't acting right.
I would recommend this to a friend - Rated 5 out of 5 stars
2.5 Gigabit Eithernet
PaulS Posted
Great device to get full internet speed on the computer
I would recommend this to a friend - Rated 5 out of 5 stars
Quality Product
CWL22 Posted
This is a quality product, functions as described and reduced time updates required. I would purchase again if needed.
I would recommend this to a friend - Rated 4 out of 5 stars
adapter
catharineh Posted
pleased with purchase. Thanks to the Best Buy sales agent, he recommended
I would recommend this to a friend - Rated 1 out of 5 stars
Only Kind of Worked for 2 Months!
AdamH Posted
I would not recommend this product. It worked okay the first couple of months of use, albeit would not allow upload speeds higher than 500 Mbps. Recently it became a bottleneck and would not allow download speeds higher than 125 Mbps. I was also noticing lagging and dropped internet connections, all because of this device. Unfortunately, Best Buy will not take back because it is past the return period. Waiting for j5 to get back to me.
No, I would not recommend this to a friendBrand response from J5create Team
Posted
If you are experiencing slow speeds, connection drops, or instability, please try the following.
1. Check the USB-C Port.
Ensure the adapter is connected directly to a full-function USB-C port on the computer.
Avoid using USB hubs, docks, or adapters during testing, as they can limit bandwidth.
2. Use a Certified Ethernet Cable.
Use a Cat5e or Cat6 Ethernet cable (required for speeds above 1 Gbps).
Try a different Ethernet cable to rule out cable issues.
3. Test Network Equipment.
Confirm your router, modem, and switch ports support 2.5 GbE.
If connected to a 1 GbE port, speeds will be capped around 940 Mbps.
4. Update Drivers & OS.
Make sure your operating system is fully up to date.
For Windows.
Check Device Manager > Network Adapters.
Update the Ethernet driver if available.
For macOS.
Ensure you are running the latest macOS version supported by your system.
5. Disable Power Saving Features (Windows).
Go to Device Manager > Network Adapter > Power Management.
Uncheck: “Allow the computer to turn off this device to save power”.
This can prevent random disconnects or throttling.
6. Try a Different USB-C Port or Computer
Test the adapter on another USB-C port or a different computer to determine whether the issue is device-specific.
7. Check Network Settings.
Verify the adapter is negotiating at the correct speed.
Windows: Network Status > Adapter Properties.
macOS: System Settings > Network > Ethernet.
If it shows 100 Mbps or 1 Gbps, the connection may be limited by hardware or cabling.