Because of physical damage or electric signal interference, your Ethernet cable can cause poor internet speed. The cable may be damaged at the connector or somewhere in between, causing a lot of failures. These are some of the best ways to control ping spiking for WiFi or Ethernet connections on your Windows PC. If your WiFi or Ethernet ping spike is extremely severe, please consider contacting your ISP for resolution. ISP can check network issues responsible for causing the ping spikes and guide you in improving your connection quality.