Speed in both directions
Download and upload are measured against Cloudflare in Mbps. Download helps games and patches arrive; upload helps when you stream or send clips.
Gamer Speed Test
Internet speed test for gaming, with ping, jitter and bufferbloat
SysCubes is a free Windows app with a Gamer Speed Test widget. Run it between matches to see download and upload speed, ping, jitter, probe loss, p99 latency and a bufferbloat grade, then open Full Results for the route to the test server.
Free Windows AppNo Account Needed100% Virus-Free (Overwolf Verified)
- Windows 11 & 10
- 7 measurements in one run
- Desktop & in-game widget
More than download speed
Seven readings that shape an online match
A fast line can still feel laggy. Gamer Speed Test puts speed, steadiness and latency under load in one result, so you can see which part of the connection needs attention.
Stability, not only speed
Ping and jitter show how fast and how steady replies are. Probe loss counts probes that got no reply, and p99 latency reveals spikes an average can hide.
Latency under load, graded
The bufferbloat grade shows how much latency rises while the connection is busy downloading or uploading, from A+ to F. A smaller increase means a more responsive connection under load.
Between matches
Run a test from your dashboard
Run the test from the same dashboard as your other widgets. Choose where ping is measured, start the test and read the results without opening a browser.
Add the Gamer Speed Test widget
Install SysCubes for Windows, open your dashboard and add the Gamer Speed Test widget.
Choose a probe server, if you want one
Speed transfers always use Cloudflare. For ping, probe loss and the route check, keep the default server or enter a game server's public IPv4 address. Some game servers don't answer probes.
Select Run Test between matches
The test uses data and may affect a game in progress, so run it between matches. Select Cancel to stop it early, or Full Results when it finishes.
New to SysCubes? The first dashboard guide shows how to pick and arrange widgets, or download SysCubes for Windows.
Read the numbers
What each result tells you
Each reading answers a different question about your connection. Lower is better for every latency reading.
| Reading | What it measures | Better when |
|---|---|---|
| Download / Upload | How quickly data reaches this PC from Cloudflare, and how quickly this PC sends data back, in Mbps. | Higher |
| Ping | The typical time for a probe to reach the selected server and return. | Lower |
| Jitter | How much latency changes from one probe to the next. | Lower: a steadier connection |
| Probe loss | The share of ICMP probes that got no reply. Some servers filter probes. | Lower |
| p99 latency | 99% of successful idle probes were this fast or faster. Needs at least 100 successful samples. | Lower: fewer spikes |
| Bufferbloat | The extra delay while downloading or uploading, compared with idle latency to Cloudflare. | A+ is below 5 ms |
Full Results adds a download and upload chart, the route hops to the probe server and an explanation of each measurement. Use Lines to add ping, jitter, probe loss, p99 latency or bufferbloat to the chart, and download the measurements and route hops as a JSON report.
Keep it where you look
On the desktop, a second monitor or in a supported game
Keep the full widget on your desktop or a second screen, or place a compact version in a supported game's overlay to check the last result between rounds.
For a live latency reading while you play, add the Network / Ping widget. If a game stutters while the connection looks steady, compare CPU, GPU and RAM in the FPS overlay and hardware monitor.
Your questions, answered
Gamer Speed Test FAQ
How do I test my internet speed for gaming?
Use a test that measures more than download speed. The SysCubes Gamer Speed Test widget measures download, upload, ping, jitter, probe loss, p99 latency and bufferbloat in one run. Run it between matches, because the test uses data and may affect games.
What is a good bufferbloat grade?
SysCubes grades how much latency rises while the connection is busy: A+ below 5 ms, A below 15 ms, B below 30 ms, C below 60 ms, D below 100 ms, otherwise F. A smaller increase means the connection stays more responsive under load.
Can I test ping to my game server?
Yes, when the server answers probes. Enter a game server's public IPv4 address as the probe server, and SysCubes uses it for ping, probe loss and the route check. Speed transfers always use Cloudflare.
What does probe loss measure?
The share of ICMP probes to the selected server that got no reply. Lower is better. Some servers filter probes, so read it together with jitter and p99 latency rather than as your game's own packet loss.
Is the SysCubes speed test free?
Yes. SysCubes for Windows is free to download via Overwolf, with no subscription fee and no account required. Gamer Speed Test is one of its widgets.
Your PC. In your hands.
Check your connection before the next match.
Download SysCubes free for Windows and keep the Gamer Speed Test beside your FPS, temperatures and audio controls.
Download SysCubes for Windows
Free • No credit card or account needed • Instant 1-minute setup • Windows 10/11