sry double post!
I got up this smorning with high hopes, i tried 10*300, tried lower, tried ram timings, tried voltages, failed. did the same with 11*~270, failed again. so i went back to my 12*244 and messed around for about 45 mins, even 1mhz faster (245) had problems
so it looks like im at the 'limit' of my cpu