helping psu voltages

thery2003

Prominent
Aug 8, 2017
15
0
510
mobo asus H81M-E
Asus DVD RW
Corsair 4 GB DDR 3
Hard disk WD 500 GB
core i3
power supply enlight sniper 430 watt

when i check the Psu voltages everything is fine except +5V
Bios +5V =5.232 V to 5.256 V
Multimeter +5V= 5.18 to 5.20 V when pc is running the windows system(test to 4 pin molex)
Multimeter +5V= 5.33 V test using jumper
Multimeter +5V= 5.22 to 5.25 Usb port when pc is running....

could any one let me know which +5V the most accurate and why so different....?

thanks