Why my write speed is lower than read or copy

[jetraw]

Hello every one. I have the issue of my write ram speed

I tried to bios update/downgrade, used singl/dual/quad channels, tried to used other version of AIDA64, but every time, i saw asymmetrically write speed.
I saw others tests in internet with 4930k and p9x79, where other people had symmetric result with 2400/2666 ram speed

Also i tried to use other RAM for test, and i saw asymmetrically result like this



But if i used RAM speed like 1333 or 1600 mhz, my tests have symmetric results like this

 

[EarthDog]

Cross posted forums for any who may want to see what has already been suggested...

https://www.techpowerup.com/forums/threads/after-oc-my-ram-write-speed-falled-down.234899/

 

[Woomack]

I will only add that to have higher writes you have to overclock CPU/cache. There are many variables that affect bandwidth, also memory ranks, timings and chipset frequency ( NB clock, don't remember how it was called in ASUS boards ).