Steam Download — Fast Then Slow [better]
When you start a download, Steam fills your RAM and your storage drive's high-speed "cache" with these compressed chunks.
If you notice the green line (disk usage) in your Steam download graph hitting a plateau or dropping to zero, your local hardware is the culprit. Steam downloads start fast then slow down : r/techsupport steam download fast then slow
Steam does not just download raw files; it downloads and encrypted data chunks to save bandwidth. When you start a download, Steam fills your
Once that initial buffer is full, your CPU must unpack the data while your storage drive writes the final files. If your drive (especially an HDD or a budget SSD) cannot write the files as fast as your internet downloads them, Steam will automatically throttle the download speed to let your hardware "catch up". Hardware Bottlenecks to Check Once that initial buffer is full, your CPU