I noticed a dramatic loss of iops when i updated from DXM04b0q to DXM05b0q on SSD 840 Pro 256G , and a small loss in write speed.
the SSD is attached to 6Gb SATA port of intel Z77 mobo.
The Z77 intel sata controler is shared between this SSD, and a mix of RAID0 and RAID1 (intel matrix storage) on two classic hard disk drives.
Actually looking for a solution, all i can say for now is :IF YOU READ THIS, DO NOT UPGRADE TO LATEST FIRMWARE!
Will keep posting if a solution is foundEdited by o2Xav - 6/4/13 at 6:22am