Get more out of your computer
Free PC calculators, practical guides, and Windows software, written and built from real-world IT experience.
Most popular tools
The calculators visitors reach for most often.
PSU Wattage Calculator
Find the right power supply size for your PC build, with headroom done properly.
OPEN CALCULATOR →CPU Bottleneck Calculator
See if your CPU is holding back your GPU performance before you upgrade.
OPEN CALCULATOR →PC Airflow Calculator
Plan fan intake and exhaust balance for cooler, quieter builds.
OPEN CALCULATOR →More than just hardware tools
Displays, networking, and developer utilities too. If you have a question about your computer, there's probably a free tool here to help.
PSU sizing, wattage and build-planning calculators for your next PC.
Bottleneck checks and performance estimates before you spend on upgrades.
Fan placement and airflow balance tools for cooler, quieter cases.
Resolution, PPI and viewing-distance helpers for choosing the right monitor.
Bandwidth, transfer-time and home-network tools that skip the jargon.
JSON and text converters, encoders and everyday developer helpers.
Learn about computers
Practical guides on hardware, software, and technology, written from real-world experience.
Parts of a Computer and Their Functions
Learn what each component inside a PC does and how they all work together.
PC Airflow Optimization: How to Cool Your Computer
Set up your case fans correctly to keep temperatures low and reduce dust buildup.
How to Check If a GPU Is Working Properly
Signs, tests and fixes: monitoring tools, benchmarking, and common GPU problems.
CIB PC Reporter
Hardware details, temperatures, drive health, and driver info, surfaced in one clean, exportable report. Free, no install wizard tricks.