Originally Posted by maicoalvim
I can put on 42 without problems?
Well, you can use at most 41 for all four cores active. When Windows disables cores because there's not enough for them to do currently, that's when the other, higher numbers will start to get used. I linked to Intel's documents about the stock settings for the CPUs in post #48.
The highest numbers you can use on yours is 43 for one and two cores active, and 42 for three cores active.
I just don't like the idea of going above 41 because you will never really be able to test if your PC is running stable or not. When you use a stress test that runs on all four cores, you can't test the 42 and 43 multiplier, only the 41 multiplier. When you limit the test to run on a single core, you can only have it run at 43 if Windows disables two cores, and that's random and will only happen rarely. You can't disable cores for testing completely in the BIOS, because you then wouldn't be able to test each of the four cores individually. You need to test each core because the first two might behave differently and you won't have proof that the disabled cores three and four will also run stable at 43.
I would personally just stay with 41 for all four multiplier settings, instead play around with the 100MHz BCLK just like you are already doing.