Router QoS vs SQM: Which Actually Fixes Lag Spikes Under Load?
If your game gets heavy when someone uploads or streams, that’s latency under load. Traditional QoS often prioritizes traffic but still leaves bloated queues. SQM is designed to control queues so latency stays stable under load.
The Practical Difference
- QoS: prioritizes traffic (can help, often misconfigured).
- SQM: controls queueing to keep latency stable under load.
- Gaming feel target: consistency, not peak speed.
Fix Order
- Test latency under real load.
- Reduce background uploads during play.
- Enable queue management / SQM if available.
- Only then consider hardware upgrades.
Rule: don’t optimize for speed. Optimize for low latency under load.
Related Guides
Queue ManagementStop bufferbloat spikes.
Ping vs Jitter vs BufferbloatWhat matters for feel.
Wi-Fi RulesEnvironment before hardware.
Ethernet FactsStability basics without myths.
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