Why is my PSU efficiency is too low for a platinum certified one ?

[Abdallah_1]

I've just bought the Corsair HX750I PSU and yesterday i've connected the Corsair link cable and installed Corsair link software, After that i opened the software and recognized that my efficiency is 80%-82% not even near 90%, Now i'm confused about it 'cause i'm not getting what i've paid for 🙁, any help ?
This is my rig: http://pcpartpicker.com/p/fPPfTW

 

[pasow]

PSU efficiency is dependent on the load you put on it. if your both low and high on your draw, efficiency will be less than at its optimal.

https://www.techpowerup.com/reviews/Corsair/HX750i/6.html

 

[fisbuar]

remember these values they operate with are spesified out of a certain value basis, the manufacturer operates in LAB conditions.
There are many conditions which could change the effective efficiency.
Your power outlet voltage and stability.
room temperature.
Air fan exhaust obstruction.
Cabinet/chassis current temperature.
Now remember that these manufacturers operate with "best possible value achievable" which means, under OPTIMAL circumstance, you will have that efficiency.
Now your overall conditions, gives you a rough loss of 10% efficiency.
This also includes how much stress is put on the PSU, from your system.

 

[Abdallah_1]

PSU efficiency is dependent on the load you put on it. if your both low and high on your draw, efficiency will be less than at its optimal.

https://www.techpowerup.com/reviews/Corsair/HX750i/6.html

alright now what am i supposed to do ?

 

[pasow]

PSU efficiency is dependent on the load you put on it. if your both low and high on your draw, efficiency will be less than at its optimal.

https://www.techpowerup.com/reviews/Corsair/HX750i/6.html

alright now what am i supposed to do ?

Figure out how much power draw you’re pulling and see if you’re close to the reported efficiency graph for the PSU. if your significantly off, then, you’re probably looking at a lemon and can get it replaced. However I do not know how this is calculated on the PSU it’s self, so this may or may not be good advice. The link I dropped above is a review of your PSU on Tech Powerup which includes a graph of its efficiency across a wide range of draws.

in all likely hood, your just checking it when your out side of its optimal operating load.

 

[fisbuar]

Or deal with the fact that we dont live in a perfect world, suck it up.
I tried to explain why these things vary, not always down to known numbers.
I'm sorry you didnt get what you expected, but its probably never going to happen either.
Even if u got a brand new one it'll do exactly the same.