CPU overclock

[Speedwack]

I have an i5 7600k and it's clocked at 4.7ghz at 1.27 volts. How do I know if my overclock is stable?

[Air]

Run a stress testing application such as Prime95 for a little while; If it lasts for a few hours without any issues, then it's likely perfectly stable.

[Speedwack]

Originally posted by Air:

Run a stress testing application such as Prime95 for a little while; If it lasts for a few hours without any issues, then it's likely perfectly stable.

What would be defined as issues?

[Sapph]

Originally posted by Speedwack:

What would be defined as issues?

Crashing/test stopping abruptly in the middle of a run.

[_I_]

use ibt or prime95

unstable would result in failed tests or bsod/reboot
also watch temps, if it goes over 90c then thats too hot for a 24/7 oc

also check with cpuz to verify its staying at the oc multi

[tacoshy]

not just run any Prime 95 -> Run Prime 95 v26.6 with FTT 1344K to 1344K (custom test).

An issue you will see if a worker stops working (will be shown) or if the PC BSoD. Then it is not stable. Watch your tempoerature. It can easily hit 90C and up to 90C it is still ok.

[Speedwack]

I’m running tests right now. CPU is at 77C

[tacoshy]

well you could go higher with voltage then. In Prime 95 you can go all the way up to 90C.

[Speedwack]

Originally posted by tacoshy:

well you could go higher with voltage then. In Prime 95 you can go all the way up to 90C.

It hit 85C and i had to stop it shortly after. That worried me.

[_I_]

100c is the limit where it will thermal throttle
best to have about a 15-20c overhead in case of a fan failure or dust buildup restricting airflow

[tacoshy]

Originally posted by Speedwack:

Originally posted by tacoshy:

well you could go higher with voltage then. In Prime 95 you can go all the way up to 90C.

It hit 85C and i had to stop it shortly after. That worried me.

you cant destroy the CPU with heat in anormal way as the CPU throttles and commences an emergency shut down. you can even remove the cpu cooler while the PC is running without breaking anything.

And no you can reach with prime 95 right up to 90C and even slightly (2-3C) above in in Prime 95. Prime 95 is the worst case scenario you never will reach on a normal way.

https://www.youtube.com/watch?v=yA0oo12rbiM

[[☥] - CJ -]

Test the OC in games
If your game doesnt crash, chances are its stable.

Testing temps in games is more accurate than testing it on Prime of which the sole purpose is to test how high the temp can go, whereas with a game it shouldnt get nearly as hot.

[Arya]

Originally posted by Speedwack:

Originally posted by tacoshy:

well you could go higher with voltage then. In Prime 95 you can go all the way up to 90C.

It hit 85C and i had to stop it shortly after. That worried me.

Don't worry about it. That's an fairly ideal temp for an overclocked Intel. Anything under 95 is perfectly fine during a stress-test, it won't run anywhere near that hot during gameplay.

You can't hurt a CPU with overheating. They'll automatically shut down if you do something risky, long before you can damage the chip.

Intel temps at a glance...

50 degrees. Ridiculously good. If your CPU is this cold during a stress test, you're not trying hard enough. That, or you have a magnificent CPU cooler.
60 degrees. Absolute perfection.
70 degrees. Near-perfect, this should be your target temp for gaming. It's unreasoanble to expect it during benchmarking.
80 degrees. Typical Stress-Test temp. Looks scary but is perfectly safe.
90 degrees. OC high water-mark. Perfectly safe, and totally normal in a Stress Test for heavily OC'ed systems. Far too high during regular gaming.
100 degrees. Cut-off point. Acceptable only in benchtesting for an extreme OC. This implies you need more cooling.