i got my i5-3570K 5 years ago
did strong 4.5GHz on 1.216 Vcore... 12 hours prime95 and LinX 4 hours++ stable...

untill i moved to itx mobo,then shift back to original tetsed mobo b4
(Asrock Fatal1ty Z77 pro-M > Asrock Z77e itx > Asrock Fatal1ty Z77 pro-M)

unfortunately, i tried back my used OC setting2 b4 as all component all the same except ssd (corsair Force GT > Intel 530) different OS(windows 7 > 10) and AIO cpu cooler (Corsair H70 > Corsair H60)

however the stress test failed within a minute... temp shown as expected the culprit which is reaching 101c++ then freeze bsod b4 restart trigger in

1stly i suspected the cooler not suffice enuf to cool down the heat, i shifted to a high end air cooler which is BeQuiet Dark Rock Pro...
hence the problem still occurs...

so the last resort is to delid the cpu, since no more warranty from Intel..i think y not...
last night using a razor blade technique (which is using a blade scrapper 2b precise) i bought this scrapper for rm1.50 from mr. DIY shop (got 5 pieces inside)
then carefully i proceeded with delidding my cpu

frankly speaking,the process didn't take much of my time..within 5-7 minutes i manage to separate the IHS from the die
but the silicon residue cleaning process did take me about 30 minutes to b done

i replaced TIM using a budget Mastergel pro (rm27 from all IT hypermart)
place all bak in rig..then 1 st attempt failed me... demmm temp spike above 100c++
then only i set the LLC setting to level 1..proceeded with linX yeah cpu going strong but with higher Vcore=1.288v
then only i change the LLC to level 2, and back to level 3
and only after that my cpu pass the 10 minutes linx test with 4.5GHz on 1.216Vcore

short story.....i had to delid my cpu after 5 years of use....
glad i did that...temp drop almost ~10c on my system