Speed & Lag

📓 Frames per second

Video and games are many still pictures shown quickly — like a flip-book. FPS means frames per second. More frames look smoother; 30 is okay, 60 is smooth.

⚡ Two kinds of slow

There are two different problems. Low FPS means the computer is struggling to draw fast enough. High ping/latency means the connection to a far-away server is slow. A faster computer cannot fix slow internet, and vice versa.

📡 Ping and latency

Ping (latency) is how long a message takes to reach a server and come back, measured in milliseconds (ms). Low ping feels instant; high ping makes online things feel delayed.

🖥️ Screen refresh (Hz)

A screen refreshes a set number of times each second, measured in Hz. A 60 Hz screen can show up to 60 frames a second. More frames than the screen can show won't look smoother on it.

⚖️ Find the bottleneck

When something is slow, ask: is the computer busy (high CPU/GPU use = upgrade or lower settings) or is the internet slow (high ping = a network problem)? Naming the real cause saves time.

Key points

• Video and games are many pictures shown quickly, like a flip-book.
• FPS means frames per second — more frames look smoother.
• There are two kinds of slow: low FPS, and high ping.
• Low FPS means the computer is struggling to draw fast enough.
• High ping means the connection to a far server is slow.
• A fast computer can't fix slow internet, and the other way round.
• When something lags, ask which one it is. That's how experts fix it.

Try it for real: Lag detective

• Open Command Prompt/Terminal and type: ping google.com — note the time in ms.
• Try an online video; does it buffer (internet) or stutter while the device is busy (computer)?
• Decide: was a recent slow moment an FPS problem or a ping problem?