Why Test Speed on Your Desktop?
Your desktop computer is one of the best devices for checking your true internet speed. Unlike phones and tablets that rely on Wi-Fi, a desktop can connect directly to your router with an Ethernet cable. This removes wireless interference from the equation and gives you the most accurate results. Let's walk through exactly how to do it right.
Before You Test: Quick Setup Checklist
A speed test is only as good as your setup. If other devices are streaming Netflix or downloading updates in the background, your results won't reflect your actual connection. Here's what to do before you hit that "Start" button.
Close Background Apps
Apps like cloud backup services (Google Drive, Dropbox, OneDrive), game launchers (Steam, Epic), and even your browser tabs can eat up bandwidth. Open your Task Manager on Windows (Ctrl + Shift + Esc) or Activity Monitor on Mac and look for anything using the network. Close what you don't need.
Use a Wired Connection If Possible
Wi-Fi adds variables — distance from the router, wall thickness, interference from microwaves and other devices. Plugging in an Ethernet cable gives you a direct line to your router. If your desktop doesn't have an Ethernet port, a USB-to-Ethernet adapter costs about $10–$15 and is worth every penny for accurate testing.
Disconnect Other Devices
If your household has 5 phones, 3 tablets, and a smart TV all connected, they're sharing your bandwidth. For the most accurate test, ask everyone to disconnect temporarily, or at least stop streaming and downloading.
How to Run a Speed Test on Your Desktop
Once your setup is clean, running the actual test is straightforward. Head to Speedtest.now and click the start button. The test measures three main things: download speed, upload speed, and ping (also called latency).
What Each Metric Means
- Download speed — How fast data comes to your computer, measured in Mbps (megabits per second). This affects streaming, browsing, and downloading files.
- Upload speed — How fast data leaves your computer. This matters for video calls, uploading files, and live streaming. Learn more about what counts as a good upload speed.
- Ping — The time it takes for a small packet of data to travel to a server and back, measured in milliseconds (ms). Lower is better. A ping under 20 ms is excellent for gaming and video calls. Read our guide on what is good ping for more detail.
Run Multiple Tests
Don't rely on a single test. Speeds can fluctuate throughout the day. Run at least 3 tests at different times — morning, afternoon, and evening — to get a realistic picture. Peak hours (6 PM to 10 PM) usually show slower speeds because more people in your area are online.
Understanding Your Results
Once you have your numbers, you need context. Is 50 Mbps good? Is 200 ms ping terrible? Here's a table showing what different speed ranges are good for:
| Download Speed | What It Supports | Rating |
|---|---|---|
| 1–10 Mbps | Basic browsing, email, SD video | Slow |
| 10–50 Mbps | HD streaming, video calls, light gaming | Moderate |
| 50–100 Mbps | 4K streaming, multiple users, online gaming | Good |
| 100–300 Mbps | Large downloads, heavy multitasking, 4+ users | Fast |
| 300+ Mbps | Anything you throw at it, smart homes, 4K on multiple screens | Very Fast |
Compare Your Speed to Your Plan
Check your ISP bill or account page for the speed you're paying for. If you're paying for 200 Mbps but only getting 80 Mbps, something is wrong. It's normal to get 80–90% of your advertised speed, but anything below 70% is a red flag. If you're consistently falling short, check out why your speed might be lower than your plan.
Wired vs. Wi-Fi Results on the Same Desktop
Curious how much Wi-Fi affects things? Here's what typical tests show on a 300 Mbps plan:
| Connection Type | Avg. Download | Avg. Upload | Avg. Ping |
|---|---|---|---|
| Ethernet (wired) | 275–290 Mbps | 28–35 Mbps | 8–12 ms |
| Wi-Fi 6 (same room) | 200–250 Mbps | 22–30 Mbps | 12–18 ms |
| Wi-Fi 5 (two rooms away) | 80–150 Mbps | 10–20 Mbps | 20–40 ms |
As you can see, even Wi-Fi 6 in the same room drops your speed by about 15–30%. Move a couple rooms away on an older Wi-Fi standard, and you could lose half your bandwidth or more.
Go Beyond Basic Speed Tests
Download and upload speed tell part of the story. But if you're experiencing lag during video calls, choppy gaming, or weird buffering even with fast speeds, you might have other issues. Here are a few extra tests to try from your desktop:
- Jitter test — Run a jitter test to check if your connection is stable. Jitter measures the variation in your ping. Under 30 ms is fine for most uses; under 10 ms is ideal for gaming and calls.
- Packet loss test — Check for packet loss to see if data is getting dropped along the way. Even 1–2% packet loss can cause noticeable problems like frozen video or dropped voice calls.
- DNS test — Your DNS (Domain Name System) translates website names into IP addresses. A slow DNS server adds delay to every page you load. You can run a DNS test to see if your DNS is slowing things down. Switching to a faster DNS like Cloudflare (1.1.1.1) or Google (8.8.8.8) often shaves 20–50 ms off page load times.
What to Do If Your Speed Is Slow
If your test results are disappointing, don't panic. There are several things you can try before calling your ISP.
Quick Fixes
- Restart your router and modem. Unplug them for 30 seconds, then plug the modem in first. Wait for it to fully connect, then plug in the router. This clears out temporary glitches and is surprisingly effective.
- Update your network drivers. On Windows, open Device Manager, find your network adapter, right-click, and choose "Update driver." Outdated drivers can cap your speeds.
- Check your Ethernet cable. Old Cat5 cables max out at 100 Mbps. If you have a plan faster than that, you need at least a Cat5e cable (supports up to 1 Gbps) or Cat6 (supports up to 10 Gbps).
- Disable your VPN. VPNs route your traffic through extra servers, which almost always reduces speed by 10–30% and increases ping.
- Scan for malware. Malware can use your bandwidth in the background without you knowing.
When to Call Your ISP
If you've tried everything above and you're still getting less than 70% of your advertised speed on a wired connection, it's time to contact your provider. Have your speed test results ready — including timestamps and the server you tested against. Most ISPs take complaints more seriously when you show up with data.
For more detailed advice, check out our full guide on why your internet might be slow.
Quick Summary
Testing your desktop's network speed is simple, but doing it right takes a little prep. Close background apps, use an Ethernet cable, and disconnect other devices for the most accurate results. Run tests at different times of day to spot patterns. If your speeds fall below 70% of what you're paying for on a wired connection, troubleshoot with the steps above — and don't hesitate to call your ISP with your test data in hand. Head to Speedtest.now to get started right now.