Reboot loop is from not changing the setting in windows. I installed Win7 in IDE mode, changed a value in the registry, booted to the bios and THEN flipped from IDE to AHCI. It has nothing to do with if you have IDE ports on the board, but how windows "talks" to the drive. SSDs work best in "native" ports (Meaning those attached to the CPU, doesn't matter if Intel or AMD.) and in AHCI mode. They will work in IDE mode, but because IDE doesn't support newer things like garbage collection or hot swap, it's not as good. I haven't looked up your board, but if it only supports 2 SATA3 ports like someone said earlier, then they might be through a secondary chip and in which case your 425MBps read probably is the best you can get. When I plugged my 840pro into the wrong SATA3 port it couldn't break 350MBps. Considering you are using a 760 it's probably time for a new setup.
For those of you who did, watch the language. I don't care if you use *** to edit them out, don't use them.