Ok,Dark Mantis.Thanks a lot.
I went through BIOS, again. I didn't modified nothing, just wrote on the paper, to explain to you.
So, first step : in M.I.T and then System Memory Multiplier ( SPD ) it's set to AUTO.
I can change to : 6.0 / 8.0 / 10.0 / 12.0 and so on. I tried to 6.0 first. Frequency was lower.About 800 Mhz, i'm not sure. So i tried to 8.0 and 10.0
If i set to 10.0 , is NOT 1333 Mhz. It's 1400 Mhz. Is that danger ? Like i said, i didn't modified nothing.
Next step : i scrolled down to M.I.T. to Advanced DRAM Features - pressed ENTER - and System Memory Multiplier ( SPD )
There are exactly the same options. 6.0 / 8.0 / 10.0 / 12.0
Now is set to AUTO, but i'm affraid to put it on 1400 MHz, that's higher than 1333 Mhz.
What am i doing wrong there ? I followed exactly like you said, but i can't set exactly to 1333 Mhz.
Thanks again.