Image Credit: Steam Step 2: Change Download Region to Fix Slow Download Speed on Steam Check if the download speed has improved. Steam will flush the download cache and restart. Click on the bar that says ‘Clear Download Cache’ and select ‘Yes’ in the prompt that appears.
Outdated network adapter driver or faulty connections cables (if you are hardwired to the router).However, there can be a number of other reasons for slow download speed on Steam including but not limited to: More often than not, it’s a background task using all of your disk that can cause writing issues with downloaded items resulting in throttled download speed. There can be a number of reasons as to why you are getting slow download speed on Steam.