Originally Posted by faction87
is it safe to just set multiplier to 42 so i get 4.2ghz? or
Something being safe is decided by the voltage you use and the temperature you'll see. You can set whatever multiplier you want as long as temperature increase is kept in check. Voltage you have to increase if you find it running unstable. You will pretty much not be able to use a voltage that might be dangerous if you go at it with a systematic increase of values and check temperatures all the time. Any air cooling is too weak for dangerous values so temperature will be the limit.
A stress test program like IntelBurnTest, LinX or prime95 will heat up the CPU more than any other program you will use on the PC. Because of this, you can use those stress test programs to decide which multiplier and voltage will be the most you can do with your specific i5 3570k CPU and your CPU cooler.
Decide on a temperature you want to stay below at all times, for example 85 C. Then go and find the multiplier - and its required voltage - where the CPU runs the stress test program at that 85 C temperature. In normal use, the CPU will stay a lot cooler than what you will have seen in the stress test, so this overclock will be totally safe.
Well, I've just noticed you have the -DS3H board. This board does not allow you to increase the CPU's vcore voltage. This means you cannot overclock much, but you also cannot do anything wrong. You can simply go ahead and increase the multiplier as far as it will go without the PC getting unstable.
You can still use the stress test programs mentioned to see if your PC runs stable at the increased multiplier.Edited by deepor - 5/10/13 at 9:14pm