ACHI drivers for W8.1 with amd

Posted by LeiNaD_87 on Super User See other posts from Super User or by LeiNaD_87
Published on 2014-06-08T16:57:09Z Indexed on 2014/06/08 21:29 UTC
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Filed under:

drivers

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ssd

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windows-8.1

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ahci

I hope you can help me...

I just installed a SSD (Samsung EVO 840) and windows 8.1 pro in my pc with M5A99X EVO ( chipset AMD 990X/SB950 ) motherboard.

The SSD is installed in sata3 socket using a sata3 wire. The AHCI mode is ON in the bios. I configured the ahci controller and now device administrator looks like this:

Device administrator

All works, but the speed of the SDD is very slow (like a HDD). Samsung magician doesn't recognize the sata mode neither the ahci. I tried to install more drivers but the system broke and I need to reinstall windows :(

I tried many things from the web, but any works:

Modify windows registy
Use compatibility mode
Modify the amd drivers and install it unsigned

Thank you for your time!!

EDIT to add a CrystalDiskMark benchmark enter image description here

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