Originally Posted by Lyoda
I have the i5 3570 NON K on a gigabyte Z77-D3H motherboard and in the bios I can change the multiplier up to 40 (its default is 34). So I put it to 39 and it seems to run fine at 3.9ghz with a corsair H60 cooler. Should I leave it? and will it be safe if I put it to 40? because it says in the description of my bios that semi locked chips have a limited multiplier.
It could, and it couldn't, you should always check for stability and see how much vCore is needed to run the chip stable when overclocking. You should use programs like;
LinX AVX Instruction; http://www.mediafire.com/download/0vh82dnirx8cl44/linx%280.64%29_10.3.4.007.zip
To test 2D and overall CPU stability
You also should check for 3D stability using programs like;
3D Mark(can be found on futuremark.com and Steam)
Cinebench 15; http://www.maxon.net/en/news/singleview-default/article/maxon-cinebench-r15-available-immediately-for-download.html
Safe temperatures are subjective, but Intel's Official one is 68.2C
You can use HW Monitor by CPUID to monitor the temperatures of your CPU while putting them through stress test.
There is also an overclocking guide for these chips on this site;