I don't know why my SSD performs not very good with my AMD SB750. I am running Windows 7 64 Bit and using AHCI with AMD Catalyst AHCI driver 9.10 and my benchmark results are very bad, especially the 4k Performance which should be good. There was no improvement in changing cables, SATA slots, using Microsoft driver, updating firmware. I don't know whats wrong. I also tried the Intel Toolbox with Microsoft driver but no increase in performance.