Are u getting all x's when u put the cube into overclock? If so, u prob have one bad board. try taking all the boards out and add back one by one in overclock mode until u find the bad board. make sure to shut down before adding each board.
Yep , all X's when its in overclock mode. Ill try them one by one . Thanks for the advice !
EDIT: You were right. Seems like 1 of the 6 boards is faulty as you said. 5/6 are working on high clock , when i plug the 6th one ill get all X's again , i guess i will have to contact someone for replacement then.
Thanks a lot for the advice again. At least i know where is the problem now.