The "fastest" DNS server typically depends on your location but these are the safest and most reliable options for most gamers:
1. Google Public DNS: Primary: 8.8.8.8, Secondary: 8.8.4.4
2. Cloudflare DNS: Primary: 1.1.1.1, Secondary: 1.0.0.1
3. OpenDNS: Primary: 208.67.222.222, Secondary: 208.67.220.220