Anyone else having problems with these...

When I tested them at 1600 w/ my system default settings 9-9-9-24 (Memtest Passed), but when I use the manufactures recommended settings 7-7-7-24 w/ all other system settings on auto as indicated below (Memtest had tons of errors)...
Truthfully I would like to get a little more out of these… I expeceted more from OCZ, but I’ve also heard it’s difficult too OC anything over 2GB…
Current Bios Settings...