Internet Speed "Capped" at 100Mbps (Gigabit Port Issue)
4.5
You pay for 1Gbps, but your wired PC never goes above 95-100Mbps.
Symptoms
- Speed stuck at 100Mbps
- Slow downloads
- Gigabit not working
Possible Causes
- Cat5 cable (not Cat5e/6)
- Damaged Ethernet pin
- Old 10/100 switch
Step-by-Step Fix
1
Check Cable Label
Ensure your cable says "Cat5e" or "Cat6". Plain "Cat5" is limited to 100Mbps.
2
Inspect Ethernet Pins
If one of the 8 tiny wires in the plug is broken, it will fallback to 100Mbps.
3
Check Network Card Settings
Device Manager > Network Adapters > Properties > Advanced > Speed & Duplex > Set to "1.0 Gbps Full Duplex".
When to See a Technician
If your speed is exactly 94-98Mbps, you have a "Fast Ethernet" bottleneck somewhere in your hardware.
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