Lag isn't always your ISP's fault — a 500 Mbps connection can still spike to 200ms mid-fight, or a stream can still buffer even when the upload speed should cover it. Usually it's the setup, not the connection itself.
Most of these issues can be fixed without calling your ISP. This walks through the common problems and fixes, from simple (use Ethernet) to more involved (DNS, QoS, bufferbloat).
Table of Contents
- Diagnose Your Problem First
- Fix #1: Switch to Wired (Ethernet)
- Fix #2: Optimise Your DNS Settings
- Fix #3: Enable QoS (Quality of Service)
- Fix #4: Fix Bufferbloat
- Fix #5: Update Router Firmware
- Fix #6: Eliminate Bandwidth Hogs
- Fix #7: Change Your ISP (Last Resort)
- Advanced Troubleshooting
- FAQ
Diagnose Your Problem First
Before fixing anything, you need to know what's actually broken. Run these tests:
Step 1: Test Your Connection
Run a speed test on GameSpeedHub
Look for these red flags:
- High ping (>50ms): ISP routing issue or distance to server
- High jitter (>10ms): Network instability (usually Wi-Fi or bufferbloat)
- Packet loss (>0%): Connection quality issue (cable, router, or ISP)
- Low download/upload: Not getting what you pay for
Step 2: Test In-Game
Open your game's network stats (usually in Settings → Display → Network):
- Ping: Should match your speed test (±5ms)
- Packet loss: Should be 0%
- Jitter: Should be <5ms
Step 3: Identify the Pattern
- Lag only at night (7-11 PM)? → ISP congestion
- Lag only on Wi-Fi? → Interference or weak signal
- Lag in all games? → Your connection
- Lag in one game only? → Game server issue
- Long load screens, but smooth once you're in? → Not your connection at all
That last one catches people out. If matches play fine but you're staring at load screens for 60 seconds while everyone else has already dropped, no amount of DNS tweaking will help — you're waiting on your drive, not the network. Our sister site has tested which SSDs actually cut load times at UK prices. Everything below assumes your problem is genuinely the connection.
Fix #1: Switch to Wired (Ethernet)
Impact: Massive | Difficulty: Easy | Cost: £10-25
This is the single biggest improvement you can make.
Why Wi-Fi Sucks for Gaming
| Issue | Wi-Fi | Ethernet |
|---|---|---|
| Latency | 2-5ms added | <1ms |
| Jitter | 1-10ms | <0.5ms |
| Packet Loss | 0.1-2% | 0% |
| Interference | Neighbours, microwaves, walls | None |
| Consistency | Varies by time of day | Rock solid |
Real-world example:
- Wi-Fi: 25ms ping, 8ms jitter, 0.5% packet loss
- Ethernet: 22ms ping, 0.3ms jitter, 0% packet loss
That 8ms jitter is the difference between smooth gameplay and stuttering.
How to Switch to Wired
If your device has an Ethernet port:
- Buy a Cat6 Ethernet cable (Amazon, £8-15)
- Plug one end into your router, one into your PC/console
- Done
If your device doesn't have an Ethernet port (laptop, Steam Deck):
- Get a USB to Ethernet adapter (£15-40)
- Plug it in
- Done
Can't run a cable to your room?
Use a Powerline adapter (£35-70). It sends Ethernet through your electrical wiring. Not as good as a direct cable, but way better than Wi-Fi.
Fix #2: Optimise Your DNS Settings
Impact: Moderate | Difficulty: Easy | Cost: Free
Your DNS (Domain Name System) translates "valorant.com" into an IP address. A slow DNS adds 10-50ms to your initial connection.
Best DNS for Gaming (2026)
| DNS Provider | Primary | Secondary | Avg Latency |
|---|---|---|---|
| Cloudflare | 1.1.1.1 | 1.0.0.1 | 10-15ms |
| 8.8.8.8 | 8.8.4.4 | 15-20ms | |
| Quad9 | 9.9.9.9 | 149.112.112.112 | 15-25ms |
| Your ISP | Auto | Auto | 20-50ms |
Recommendation: Use Cloudflare 1.1.1.1. It's the fastest and has built-in malware blocking.
How to Change DNS (Windows)
- Open Settings → Network & Internet → Ethernet (or Wi-Fi)
- Click Edit next to "DNS server assignment"
- Select Manual
- Turn on IPv4
- Enter:
- Preferred DNS: 1.1.1.1
- Alternate DNS: 1.0.0.1
- Click Save
How to Change DNS (Mac)
- Open System Preferences → Network
- Select your connection → Advanced
- Go to DNS tab
- Click + and add:
- 1.1.1.1
- 1.0.0.1
- Click OK → Apply
How to Change DNS (Router-Wide)
- Open your router's admin page (usually 192.168.1.1 or 192.168.0.1)
- Log in (check the sticker on your router for password)
- Find DNS Settings (usually under WAN or Internet)
- Enter:
- Primary DNS: 1.1.1.1
- Secondary DNS: 1.0.0.1
- Save and reboot router
Fix #3: Enable QoS (Quality of Service)
Impact: High (if you share your network) | Difficulty: Medium | Cost: Free
QoS prioritises gaming traffic over Netflix, YouTube, and downloads. Without it, someone watching 4K Netflix can spike your ping by 50-100ms.
How QoS Works
Your router has limited upload/download bandwidth. QoS tells it:
- Gaming traffic: Priority 1 (always goes first)
- Video calls: Priority 2
- Streaming: Priority 3
- Downloads: Priority 4 (gets whatever's left)
How to Enable QoS
Note: Every router is different. Here's the general process:
- Open your router's admin page (192.168.1.1 or 192.168.0.1)
- Find QoS Settings (might be under Advanced → Traffic Control)
- Enable QoS
- Set your upload and download speeds (use 80% of your actual speed)
- Add your gaming device's IP address to the "High Priority" list
- Save and reboot
Can't find QoS settings?
Your router might not support it. Consider upgrading to a gaming router (see our Gaming Routers 2026 guide).
Fix #4: Fix Bufferbloat
Impact: Massive (if you have it) | Difficulty: Hard | Cost: Free or £150+
Bufferbloat is when your router's buffer gets overloaded, causing massive ping spikes (100-500ms) during uploads/downloads.
How to Test for Bufferbloat
- Go to Waveform Bufferbloat Test
- Run the test
- Check your grade:
- A/B: You're fine
- C/D: Moderate bufferbloat
- F: Severe bufferbloat (fix this ASAP)
How to Fix Bufferbloat
Option 1: Enable SQM (Smart Queue Management) in Your Router
- Only works if your router supports it (most don't)
- Look for "SQM," "Cake," or "fq_codel" in router settings
- If you have it, enable it and set your upload/download speeds to 90% of actual
Option 2: Upgrade to a Router with SQM
- Budget: TP-Link Archer AX55 (£80) - has basic SQM
- Mid-Range: ASUS RT-AX86U (£180) - excellent SQM implementation
- Enthusiast: Ubiquiti Dream Machine (£350+) - enterprise-grade SQM
Option 3: Use a Third-Party Firmware
- Flash your router with OpenWrt or DD-WRT (advanced users only)
- These firmwares have built-in SQM
Fix #5: Update Router Firmware
Impact: Low to Moderate | Difficulty: Easy | Cost: Free
Router manufacturers release firmware updates to fix bugs and improve performance. Most people never update.
How to Update Router Firmware
- Open your router's admin page
- Find Firmware Update (usually under Administration or System)
- Click Check for Updates
- If available, click Update and wait (don't unplug during this!)
- Router will reboot automatically
Pro Tip: Enable automatic updates if your router supports it.
Fix #6: Eliminate Bandwidth Hogs
Impact: High (if applicable) | Difficulty: Easy | Cost: Free
Common bandwidth hogs:
- Windows Updates (can use 50+ Mbps in the background)
- Steam/Epic downloads (pause these while gaming)
- Cloud backups (Google Drive, Dropbox, OneDrive)
- Torrents (even "idle" torrents use upload bandwidth)
- Other people on your network (Netflix, YouTube, TikTok)
How to Find Bandwidth Hogs (Windows)
- Open Task Manager (Ctrl+Shift+Esc)
- Go to Performance tab → Ethernet (or Wi-Fi)
- Look at the graph—if it's maxed out, click Open Resource Monitor
- Go to Network tab to see which apps are using bandwidth
- Close the culprits
How to Pause Windows Updates
- Settings → Windows Update → Pause updates for 1 week
- Repeat weekly (annoying, but effective)
Fix #7: Change Your ISP (Last Resort)
Impact: Massive | Difficulty: Hard | Cost: Varies
If you've tried everything and your connection still sucks, the problem is your ISP.
Signs You Need to Switch ISPs
- Ping >100ms to nearby servers (ISP routing issue)
- Packet loss >1% consistently (infrastructure problem)
- Speeds drop 50%+ at night (oversold network)
- Frequent disconnects (unstable connection)
How to Choose a Better ISP
- Compare ISPs in your area
- Look for:
- Fibre (best) or Cable (good)
- Low ping (<30ms to game servers)
- No data caps (or at least 1TB+)
- Good reviews from gamers
- Call and ask about their "gaming performance" (if they don't know what that means, skip them)
Advanced Troubleshooting
Check for Malware
Malware can use your bandwidth in the background. Run a scan with Windows Defender or Malwarebytes.
Disable IPv6 (Temporary Test)
Some games have IPv6 routing issues. Disable it temporarily:
- Settings → Network & Internet → Ethernet → Edit
- Turn off IPv6
- Test your game
- If it doesn't help, turn it back on
Use a VPN (For Routing Issues Only)
If your ISP has terrible routing to game servers, a gaming VPN like ExitLag or WTFast can help. But it adds 5-10ms latency, so only use it if your ISP's routing is broken.
Check Your Ethernet Cable
A damaged Cat5 cable can cause packet loss. Upgrade to Cat6 or Cat6a (£10).
FAQ
Q: Will a better router fix my lag?
A: Only if your current router is the bottleneck (old, overheating, or doesn't support your internet speed). If you have a modern router, the problem is likely your ISP or setup.
Q: Does closing background apps help?
A: Yes, but only if they're using bandwidth. Closing Discord won't help, but pausing a Steam download will.
Q: Can I game on Wi-Fi 6 or Wi-Fi 7?
A: Yes, but wired is still better. Wi-Fi 6/7 reduces latency compared to Wi-Fi 5, but can't eliminate interference.
Q: Will upgrading my internet speed reduce lag?
A: Only if you're maxing out your current speed. Going from 100 Mbps to 500 Mbps won't reduce ping—it just gives you more headroom.
Q: What's the difference between ping and latency?
A: They're the same thing. Ping is the time it takes for data to travel from your PC to the server and back.
Q: Can I fix lag on a mobile hotspot?
A: Unlikely. Mobile hotspots have high latency (50-100ms) and unstable connections. Only viable for turn-based games.
The Bottom Line
Here's the priority order for fixing lag:
- Switch to Ethernet (biggest impact, easiest fix)
- Change DNS to 1.1.1.1 (free, takes 2 minutes)
- Enable QoS (if you share your network)
- Fix bufferbloat (if you have it)
- Update router firmware (low effort, might help)
- Eliminate bandwidth hogs (check Task Manager)
- Switch ISPs (last resort, but sometimes necessary)
Still experiencing lag?
Test your connection and see if your ISP is the problem.
Looking for a better ISP?
Compare providers in your area based on real gamer reviews.
Last updated: February 6, 2026