Since many people using these systems with stock cooler  I shouldnt have bluescreen because of  cpu + stock fan? 50-70 C  shouldnt cause bluescreen at 'windows starting ' screen?   I am sorry  bugging you with nubbie questions but I need to find out where is problem  before pay for something :// 
Btw going to buy ; CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 sDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model TR3X6G1600C8D
 I hope these ones will work out. 
Ihave another question;
1- North bridge temps   under load = 70-75C    isnt it high without OC ?
2-  I   ' enable '   Base clock(BLCK)  control  but I leave  BLCK Frequency   '133'      isnt this same thing  with 'disable'?  But my cpu temps going  65C   idle  at 3.20 ghz.  not even OC there  yet :O