1st rule:
never use a neo2 with a booster. (it will eventually die because the board uses crappy power components. huge flux in volts...etc.)
2nd rule:
never use a neo2 period.
3rd rule:
use a high cfm fan over the dimms and booster. heat is a huge factor when overclocking UTT and booster if using one must be kept cool at all times.
4th rule:
burn them in! not everyone is going to boot into 260 2-2-2 the first time. You should find the max mhz and max volts (try 3.2v first and work your way up .1v at a time, if you get more errors, or no gain in overclock, just roll the volts back to the last best stable setting) and then roll back a few mhz and loop memtest overnight while you sleep.
it's good to keep a log of memtest86 and all the settings you change in the bios. you can make an excel spread sheet and just keep track of your used settings. like volts, mhz, 1t/2t, vcore, chipset volts, drive strength, timings, etc....run test 5 to start out and loop a few times then roll on to some other tests, but usually test 5 is quick indication if it's stable or not.
make sure you are cooling the ram well while you do this. keep the case door open. then use your computer at the highest stable overclock and use your computer like you normally would for a week or so, then go back in a week or two and try to overlock them a bit more. in most cases they will reach higher a few more mhz. / also you will probably be able to oc the same speed but you will need less volts from burning in, this may contribute to higher speed since they are using less volts thus in turn will run cooler.
sorry for the long story, but i hope it might help some of you.