SQM
Bufferbloat explained: how to reduce lag while gaming
How to test for bufferbloat, how SQM fixes it, how to set the speed limits, and what no queue setting can fix.
Topic
Gaming and low-latency networks
Lag is mostly about delay and its spikes, not bandwidth. Here's what your home network controls and what it can't.
Your ping is mostly set outside your home: the distance to the game server and your provider's network. What your home network decides is whether that ping stays steady. Spikes usually come from queues filling up when someone else uploads or downloads (bufferbloat), from Wi-Fi contention and interference, or from two routers in a row breaking inbound connections.
The decisions that matter
- 1 Fix bufferbloat with SQM Smart Queue Management keeps queues short when the line is busy. It targets the most common cause of lag spikes under load that you can fix at home; we list every router whose maker documents it. Check the maker's speed guidance: Ubiquiti, for example, doesn't recommend its Smart Queues on connections of 300 Mbps or more.
- 2 Wire the console or PC Ethernet removes Wi-Fi contention entirely. Where cable can't reach, a mesh unit with wired backhaul nearby is the next best option.
- 3 Check for double NAT Two routers in a row can cause moderate or strict NAT types and break hosting and voice chat. Bridge mode or IP passthrough on the provider's gateway fixes it where the provider supports it.
- 4 Use 6 GHz where you can't wire The 6 GHz band (Wi-Fi 6E and 7) is less crowded, which helps consistency at short range.
From the catalog
Documented SQM in our catalog
22 current routers and mesh systems document Smart Queue Management. The lowest-priced:
| Model | Type | Manufacturer price |
|---|---|---|
| MikroTik hAP be lite (A42G-HbeP) | Router | $79 |
| MikroTik hAP ax S (E62iUGS-2axD5axT) | Router | $79 |
| eero 6 | Mesh, 1-pack | $89.99 |
| MikroTik hAP ax² (C52iG-5HaxD2HaxD-TC) | Router | $99 |
| MikroTik hAP ax³ (C53UiG+5HPaxD2HPaxD) | Router | $139 |
| eero 6+ | Mesh, 1-pack | $139.99 |
| eero 7 | Mesh, 1-pack | $169.99 |
| GL.iNet Flint 2 (GL-MT6000) | Router | $169.99 |
Articles
Troubleshooting
Double NAT: how to tell and how to fix it
How to spot two routers in a row, what it breaks, and the fix for each kind of setup.
Gaming
Ethernet vs Wi-Fi 7 for PC and console gaming
The mechanism behind Wi-Fi lag spikes, what published measurements show, console Wi-Fi specs, and a decision guide for wiring.
Gaming
Gaming latency and jitter: a 10-minute fix for low-lag Wi-Fi
Latency vs. jitter in plain English, plus the 10-minute router fix for lag spikes: SQM, placement, 6 GHz and wiring.
Gaming
Gaming router vs standard router: what actually matters
Each gaming-router feature mapped to what its maker documents, and what matters more for lag.
Being researched
Planned for this topic. Each article is published only after it has been fact-checked and approved.
- Gaming Router vs Standard Router: What Actually Matters
- NAT Types Explained: Open, Moderate, Strict and PlayStation Type 1–3
- Ethernet vs Wi-Fi 7 for PC and Console Gaming
- PS5 Network Setup: Wired, Wi-Fi, NAT and Download Speed
- Xbox Series X|S Network Setup: NAT, Teredo and IPv6
- Fiber vs Cable vs 5G vs Satellite for Gaming: What the FCC Data Shows