Go to the advanced tab. Then jumperfree config, then ai overclocking and set it to manual. Click enter on dram frequency and change it to ddr2-800MHz. Click F10 and save, then that ram will do like Forest Gump and run. I set my system to look just like yours so you will see how it should look. My cpu runs a lot cooler at your speed too, just might keep it there (small difference in performance). Oh, and you might want to go and set your timings up manually also, they may default to something less desirable.
I saw your system you posted pics. Your cpu temp looks a little high for being water cooled. Was it under a load or 50c at idle? Just asking because mine is on air and max load it hits 55c.