I just built a system on an Asus P8Z68 Deluxe motherboard that includes two Intel 510 256Gb drives. One is drive C and the other is drive D on ports 0 and 1 respectively of the Intel controller. I am not using the Marvell controller. I was dissapointed in the Primary Drive WEI score so I opened the Intel RST Management panel and noticed the C drive is reporting a SATA Transfer Rate of 3Gbs while the D drive is reporting a 6Gbs transfer rate. The only difference between the two drives is the C drive is running the PWG2 firmware while the other one is running the PWG4 firmware. Does anyone have any thoughts on what may be holding this drive back?
