“Tachycardia” is a sign. “Palpitations” or “heart racing” are symptoms. Signs are the objective things that can be measured and recorded as hard data. Symptoms are what the patient reports feeling that are not measurable. In taking a history and physical, the symptoms tell the physician what signs to look for.
(To be fair, I did manage to run Half Life: Alyx and Beat Saber on a 1060)