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We help you keep your PC cool and fast. Test your fan setup in 3D before you change a thing. Then use our tools to fix whatever is slowing you down.

Try the PC Airflow Simulator Explore PC calculators

9 PC calculators and tools Every PC calculator is free

PC Airflow Simulator

See where the air goes before you move a fan

Build your own fan layout in cases from Mini-ITX to full towers, or start from a ready-made one. See case pressure, the air reaching your graphics card, and how hot your graphics card and CPU get, then compare and share layouts.

Open the simulator

One case type is free as a preview. Every other case comes with Pro.

  1. 1

    Pick your case

    Choose the case you own, from Mini-ITX to a full tower.

  2. 2

    Set your fans

    Tap each fan spot and set it to blow in, blow out, or stay empty.

  3. 3

    Run the air

    Press Run and watch where the air goes, how much reaches your graphics card, and how warm it gets.

Plan and improve your PC

See the frame rate your parts should reach with our FPS calculator, choose which part to upgrade first, and test how well your parts work together. More tools help you tune the PC you already have, from airflow to RAM settings.

Free PC tools and calculators

PC Upgrade Checker

See which upgrade adds the most frames and whether it fits your board and power supply.

Open tool

PC Airflow Calculator

Compare intake and exhaust airflow and see which way your case leans.

Open tool

PC Bottleneck Calculator

Check CPU and GPU balance before you plan your next upgrade.

Open tool
Computer Info Bits Pro

Go further with Computer Info Bits Pro

One subscription gives you all 8 Pro features, plus every new premium tool we add.

See Pro plans What each Pro feature does

Everything, the simulator included, for Was US$10, nowUS$5US$10 a month. Cancel anytime.

  • 3D PC Airflow Simulator

    Every case and ready-made layout, with temperatures for the graphics card and CPU you pick. Save builds and compare two layouts side by side.

  • Calculator reports

    Print results from 4 of our calculators, or save them as PDFs. Add your notes, business name, and logo.

  • FPS Game Planner

    Add up to 12 games and a target frame rate, and see the best settings that hold it in each one. Add a second PC to see what an upgrade changes.

  • Bill Cutter

    Compare your internet plan with up to 3 offers over two years, including promo prices that end and rental fees. See the cheapest plan that still covers your home, and get a call script.

  • Multi-PC UPS Planner

    Size battery backup for several PCs, monitors, consoles, and network gear on one UPS or split across three, then print every unit in one report.

  • PC Reporter Pro

    Our free Windows app checks your hardware, temperatures, drives, and drivers. Pro finds what your repeat crashes, freezes, and restarts have in common, and puts your logo on reports.

  • RAM Optimizer Pro

    Our Windows app finds what's eating your memory, and its tray meter uses under 5 MB. Pro warns you before memory runs out, spots apps that leak, and keeps startup apps off.

  • ISP Watchdog

    Logs your internet outages, speed and lag around the clock, compares them with your plan, and writes the letter asking your provider for a credit.

Free Windows app

Find your PC information with CIB PC Reporter

Read hardware details, temperatures, drive health, and driver information in one clean, exportable report. It is free, with a standalone option that runs without installing.

  • Full hardware inventory at a glance
  • Live temperatures and drive health
  • One-click exportable report
Download free Windows 10 and 11

Find the weak spot in your airflow

Set up your own case, run the air through it, and see which parts run short of it.

Try the PC Airflow Simulator