hi guys i have an asus k556u its new but no garanty so i have problem with mechanics hdd, when it work with ssd hdd its ok but when it work with mechanic hdd it work very slowly i change hdd with new one but almost it work very slowly...

SSD fastests contra HDD.

sure but its very very slow for open the window it take 1min...

Depend of operating system version. Check mode of hdd controller - IDE or AHCI. Maybe need to clean hdd from old data or(and) defragment it. For best performance turn off video effect"s and use for background only clean colors without pictures, photos, etc.

I TRYED BY 3 HDD ONE OF THEM WAS NEW AND DIFRENT OPERATION SYSTEM, ONE MORE THING IN SETTUP IT JUST HAVE AHCI MODE...

Try this https://www.asus.com/us/support/FAQ/1034608/
https://remontka.pro/disk-usage-100-percent-windows-10/

thanx for answer, i try it but noting change.... :(

You can improve disk performance(+33%) by change HDD model from 5400 rpm to 7200 rpm, but best performance - change HDD to SSD for system disk.

one more thing i check sata0 its directly related to pch. Could there be a problem with pch?

(sorry for my bad english)

If the root of problem is pch - your work with ssd will be slowly too.
Can you set up optibay instead of your DVD-RW drive, use mechanical HDD in optibay and SSD in HDD slot? With this, you can use big space of HDD with fast speed of SSD; and of cource you can test speed of your HDD under installed OS.

tanx for answer, realy i test many way, i used CADI for HDD for tsst SATA1 (DVD Slot)
but in all way with mechanic HDD speed is very very slow but with ssd no problem.