3.3V Rail going out of spec

Who do i blame for 3.3V line going out of spec

Corsair or Gigabyte?

My 3.3v line is going out of spec if the pc is fully loaded

From my understanding there is an allowance for it to go upto 5% off 3.3v (is it 3.3v or 3.33?)

Anyway my Corsair HX1200i is always at 3.297 flickering to 3.285 at idle (readings from the psu lower readings from the motherboard)

My old Corsair HX750 was always around 3.310 to 3.330v on the same pc (readings from the motherboard)

When the pc is fully loaded the HX1200i says that its putting out 3.266v

The motherboard Z390 M Gaming with i9-9900KS says that the 3.3v rail is 3.127v

To stay in spec is has to be above 3.135v at all times

yes i know its not much out of spec

but my old HX750 managed to keep it above 3.25v at all times even fully loaded

so why is my HX1200i unable to do it

the psu was upgraded to give ensure there was plenty of headroom

but i have ended up with much worse voltages

see image when the cpu and gpu is loaded below

oh and the gpu is only slightly loaded with a 118w load

the gpu pulls over 350w when gaming

which causes the 3.3v rail to drop even more than i am showing in the image

I am pulling only 498w from the psu

I have actually seen it pull 854w before whist stress testing both cpu and gpu in a game

(prime 95 whist gaming)

The ATX standard allows for a +/- 10% on the voltages. We allow for a +/- 5%. Based on those standards your unit is still well within the normal operating spec for the 3.3v rail.

ok thanks but its still a bit of a joke to pay £240 for a new psu only for it to perform worse than my 5 year old HX750