How fast is your drive really? Fast Disk Benchmark gives you the answer in under a minute — with the industry-standard tests trusted by hardware reviewers worldwide. Whether you just installed a new NVMe SSD, want to verify your external drive delivers its advertised speeds, or need to diagnose why your PC feels slow, Fast Disk Benchmark measures true disk performance with professional accuracy. REAL NUMBERS, NOT CACHE ILLUSIONS Fast Disk Benchmark is built on a purpose-built native engine written in pure C. It bypasses the Windows file cache entirely using unbuffered, write-through I/O — so the numbers you see reflect what your hardware actually delivers, not what memory caching pretends it does. Test data is fully incompressible, so drives with compression tricks cannot inflate their scores. THE FOUR TESTS THAT MATTER • SEQ1M Q8T1 — Sequential 1 MiB blocks at queue depth 8. The headline speed for large file copies and video editing. • SEQ1M Q1T1 — Sequential at queue depth 1. Real-world single-stream transfer speed. • RND4K Q32T1 — Random 4 KiB at queue depth 32. The metric that determines how snappy Windows and your applications feel. • RND4K Q1T1 — Random 4 KiB at queue depth 1. The toughest test — true storage latency exposed. Each test reports throughput in MB/s and IOPS, measured for both read and write. SIMPLE, SAFE, FLEXIBLE Pick any drive from the dropdown or browse to a specific folder — internal SSDs, hard drives, USB sticks, external drives, even network shares. Choose your test file size from 256 MiB up to 4 GiB. Watch live speed readings as each test runs, with a clear progress bar. The temporary test file is automatically deleted when the benchmark completes — your drive is left exactly as it was. No administrator rights required. No drivers installed. No risk to your data. BEAUTIFUL, READABLE RESULTS Results appear in a clean, color-coded grid — read speeds in green, write speeds in amber — with big, clear numbers you can screenshot and share. Compare drives, verify upgrades, catch failing hardware before it fails you. Perfect for PC builders, hardware enthusiasts, IT professionals, gamers, and anyone who wants to know the truth about their storage. Download Fast Disk Benchmark and put your drives to the test today.