I have installed Samsung 750 Evo 120 GB SSD on my old pc with below config.
Core 2 Duo E4500 2.2 ghz
Avertek G41 -775 MoBo
4 GB Ram
I have also connected 320 GB Internal harddisk as my secondary disk.
Now, when I run Samsung Magician under OS Optimization it shows -
"AHCI is disabled for one...