Datacenter Power

U = R * I

With :

• U the tension
• R the electrical resistance
• I the intensity

P = U * I = R * I * I

With :

• P the power

P_kW = S_kVA * PF

With:

• PF the Power Factor
• P_kW the Real power
• S_kVA the apparent power

For recent servers (with recent PSU): 1 > PF > 0.98 at full load. Value varies depending of load.