Before you start
- A router with QoS (most modern routers)
Method 1 Turn on QoS
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Step 1: Measure your speed
Run a speed test with a cable. Note download and upload.
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Step 2: Open QoS
In your router app/admin page, look for QoS, Bandwidth Control, Device Priority, Game Accelerator or Adaptive QoS.
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Step 3: Enter bandwidth
Enter about 85–95% of your measured speeds. This lets the router control the queue instead of your provider’s equipment.
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Step 4: Set priorities
Give your console, gaming PC or work laptop High priority, or choose “Gaming”/“Video calls” as the priority category.
Method 2 Use Smart Queue Management if available
SQM fairly shares bandwidth and keeps latency low for everyone, often working better than manual priority rules.
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Step 1: Find SQM
On routers with SQM (OpenWrt, some ASUS, Ubiquiti, eero, Firewalla, etc.), enable SQM or Cake.
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Step 2: Test
Run a bufferbloat test (e.g. Waveform) while someone downloads. Ping should stay low under load.
Troubleshooting
QoS made everything slower
The bandwidth values are too low. Set them closer to your measured speed, or turn QoS off on very fast connections where it isn’t needed.
The router has no QoS
Use device-level limits (e.g. download speed caps in Steam) or consider a router with modern QoS/SQM.
Frequently asked questions
Does QoS increase my speed?
No. It decides who gets bandwidth first when the line is busy, reducing lag.
Is QoS useful on a gigabit connection?
Less so. Very fast connections rarely get congested, but bufferbloat on upload can still benefit from SQM.
Summary
Turn on QoS, enter about 90% of your real speeds, and give your gaming or streaming device High priority. If your router has SQM, use it for the lowest lag.
