Is it happening that your PC is still experiencing slow internet connections even though you're using a 1 Gbps plan?
Is it happening that your PC is still experiencing slow internet connections even though you're using a 1 Gbps plan?
Hello everyone,
I'm facing a concerning problem with my PC's network performance. After upgrading to a 1 Gbps service tier from my ISP, I'm only achieving around 300 Mbps whether I'm connected via Ethernet or Wi-Fi. By comparison, a mobile device on the same network is getting approximately 800 Mbps over Wi-Fi.
Details:
Adapter Model: Realtek PCIe GbE Family Controller
Motherboard: Gigabyte B450M DS3H wifi
Operating System: Windows 10
Driver Version: 10.68.815.2023
Modem: ET2251
Router: SBE1v1k
Issue Description:
My PC's download speed remains consistently at about 300 Mbps on both Ethernet and Wi-Fi connections, while upload speeds are normal and match the expected performance.
Troubleshooting Steps:
- Updated drivers for the Ethernet adapter.
- Tested various Ethernet cables and ports.
- Reset network settings and verified adapter configurations in Device Manager.
- A technician from my ISP confirmed the modem is receiving the full 1 Gbps speed. They replaced the router, which was new, but performance didn't improve.
- Contacted Gigabyte support for the motherboard; attempted driver updates and disabled Windows auto-tuning without success.
- Tested the modem directly to the PC; speed remained slow.
- Changed speed & duplex settings to off Auto and set to 1.0 Gbps Full Duplex.
I reached out to Realtek, suspecting the issue might lie with the Ethernet adapter, but I'm seeking advice from others who might have similar experiences or suggestions.
Thank you in advance for your assistance!
The WiFi adapter operates at a maximum of 1x1 AC, restricting it to 433Mbps. Including overhead, 300Mbps is reasonable. The Ethernet issue requires further attention. It should support full speed. Is the Ethernet connected to a switch or directly to the modem? Are your Ethernet settings in Windows set to 1Gbps Full Duplex? Have you installed the latest Ethernet driver?
Thank you for your feedback! Based on the adapter's constraints, I understand the situation better now. I value your clarification on this matter. Concerning the Ethernet, I'm still working through why I'm not reaching full speeds. The connection path shows the cable runs directly from the modem to the router and then to the PC without any switches. I've adjusted the adapter settings in Windows to 1Gbps full duplex to prevent auto-negotiation to a lower speed, and I've updated the driver from Gigabyte's site. However, I'm still only seeing about 300Mbps, which is unexpected. Could there be any other Windows settings affecting Ethernet performance? I believe the hardware itself seems fine.
Probable issue with the modem. Could you share the exact brand and model of your modem?
Thank you for your reply! To be clear, the modem is successfully getting the full 1Gbps from the ISP. A technician from my internet service provider checked the connection at the modem and measured speeds around 1035 Mbps, which suggests the modem and incoming service are functioning properly. The issue doesn’t seem to lie with the modem or router.
The exact models I have are:
Modem Brand/Model: Spectrum ET2251
Router Model: Spectrum SBE1v1k
I attempted to connect my PC directly to the modem without using the router, but I still experienced slow speeds of about 300 Mbps. Also, when testing my phone’s network speed through the same router’s Wi-Fi, I got up to 800 Mbps. This indicates the problem is likely not with the modem or router itself, but rather with my PC.
It seems the motherboard includes cFosSpeed Internet Accelerator Software.
Check the support page at the provided link.
Remove it if installed and restart the system.
These accelerators often create issues.
Also, since it's a Realtek GBE adapter, it should work natively with Windows without needing Gigabyte drivers.
Thank you for your feedback regarding the cFosSpeed software. I verified my system, and it seems this program was never installed, so it isn’t contributing to the problem.
Here’s an update on the alternatives I’ve tried thus far:
Safe mode Network test: I performed a speed test in safe mode with networking to confirm minimal background processes were impacting the network, but speeds remained around 320Mbps, consistent with normal conditions.
System File Check: I ran an SFC scan which detected and repaired some corrupted Windows files, yet network speed did not improve after the repair and restart.
These actions suggest software conflicts or file corruption are unlikely causes. The steady speed around 300Mbps points to a possible hardware limitation or configuration issue that I haven’t identified yet.
Do you have any more ideas about what could be causing this, or would you like additional diagnostic steps?
Also cleared the network prior to the suggested reset, correct?