Why Is My Gaming PC Lagging? 6 Things to Check First

Gaming lag is one of the most common and most misdiagnosed PC problems there is. People assume it’s their PC when it’s actually their network. Or they assume it’s their internet connection when the real issue is five metres away in their router settings. Before spending money on anything, here’s what’s actually worth checking.

1. Check whether it’s lag or stuttering (they’re different problems)

This matters because the fixes are completely different.

Lag (high ping) means there’s a delay between what you do and what happens in the game. It’s a network problem. You’ll see a high ms number in-game, disconnects, or rubber-banding.

Stuttering (low FPS or frame drops) means the game isn’t running smoothly, even if your connection is fine. This is a performance problem: hardware, drivers, or settings.

If you’re not sure which you have: most games have an option to display your ping and FPS on screen. Check both. High ping means network. Low or inconsistent FPS means PC performance.

2. Switch to a wired connection if you haven’t already

WiFi is the single most common cause of gaming lag, and it’s the easiest thing to eliminate. Even a strong WiFi signal can have inconsistent latency, especially if there are other devices competing for bandwidth, walls between you and the router, or interference from neighbouring networks.

An ethernet cable from your PC to your router will almost always reduce lag noticeably. If running a cable isn’t practical, a powerline adapter (which sends your connection through the house’s electrical wiring) is the next best option and works well in most homes.

3. Check what else is using your connection

Even with a fast internet connection, you can run into lag if something else is hammering your bandwidth at the same time. Common culprits:

• Windows Update downloading in the background
• A phone or tablet doing a large app update
• Someone else in the house streaming 4K video
• Cloud backup software (OneDrive, Google Drive) syncing large files

The quickest way to check on Windows: press Ctrl + Shift + Esc to open Task Manager, then click the Network column to sort by usage. If something is chewing through bandwidth while you’re trying to play, that’s likely your problem.

Some routers support QoS (Quality of Service) settings that let you prioritise gaming traffic. If yours does, it’s worth enabling.

4. Update your network drivers and check your adapter settings

Outdated or misconfigured network drivers can cause all kinds of instability. On Windows 11, the easiest way to check:

1. Right-click the Start button, then Device Manager
2. Expand Network Adapters
3. Right-click your network adapter, then Update driver

Also worth checking: if you’re on WiFi, open Device Manager > Network Adapters > [your WiFi adapter] > Properties > Advanced tab. Look for a setting called Roaming Aggressiveness or Power Management. Setting roaming aggressiveness to “Lowest” stops your adapter constantly hunting for a stronger signal, which can cause brief disconnects mid-game.

5. Check your router’s position and channel

If you’re on WiFi, where your router sits matters a lot. Routers work best in an open, central location, not tucked inside a cupboard, behind a television, or at floor level.

WiFi channels also matter. Most routers are set to automatically choose a channel, but if your neighbours are all on the same channel, you’ll get interference. Logging into your router’s settings (usually at 192.168.1.1 or 192.168.0.1 in a browser) and switching to a less congested channel can make a real difference. The 5GHz band is usually less congested than 2.4GHz if your router and PC both support it.

6. For stuttering: check your GPU drivers and in-game settings

If the problem is frame drops rather than lag, the most common causes are:

• Outdated GPU drivers: update through NVIDIA GeForce Experience, AMD Radeon Software, or Intel Arc Control depending on your graphics card
• Settings too high for your hardware: try dropping resolution or quality settings to see if performance improves
• Background processes: some programmes (especially other games platforms, recording software, or browser extensions) can interfere with game performance. Check Task Manager during a stutter to see if anything spikes
• Thermal throttling: if your PC is overheating, it’ll deliberately slow itself down to avoid damage. Download a tool like HWiNFO or MSI Afterburner to check temperatures while gaming. GPU temperatures above 90°C or CPU above 95°C during load suggest a cooling problem

---

If you’ve worked through this list and still can’t pin it down, or you’d rather have someone come and sort it properly, I help with gaming PC setup and troubleshooting across Falkirk and Central Scotland.

Find out more about gaming PC help in Falkirk, or call 07944 156 453 to describe what’s happening. No fix, no fee, 7 days a week.