Hi,
Just a quick update incase anyone is still following this thread.
I was still having cold boot issue when setting memory to correct settings for 1600. I had previously tried clearing the RTC jumper but it made no diffrence for me.
I finally think I have got it to work ok. I updated to beta BIOS 1053 then powered off and removed power cord, cleared RTC jumper and while jumper was in clear position I removed battery.
Left it like that for about a minute then changed jumper back to normal, re instered battery and booted back into BIOS and made the changes I needed.
Have done a few cold boots since and booted no problem and memory remains at 1600.
So looks like this does work. If your having any issues with this board then give this a try and see how it goes.