is this good or bad for i7 4790k



i used prime 95 the newest verion for around 20 mins i had it at 1190 voltage at 4.5ghz and it crashed after 3 mins so i gone up to 1195 and it seemed fine for about 20 mins

 
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why the lower prime verion whats the differents


 

and just a fast ? what cpu cooler is better cool master nepton 240m or nepton 280l i am rmaing my cooler and they gave me those 2 choices
 
280l providing it fits your case. It's better. The reason for the older prime is because the newer versions are unsafe for haswell CPUs and can cause damaged to your chip. Again, I suggest testing for longer with prime, and doing 10-20 passes of intel burn test at max setting.
 


i had both 280l and 240m and it seems that the 240m has better temps and the 280l with worst anbd is louder

 


i cant find that prime number

http://www.mersenne.org/download/