Failed Prime95 but passed everything else. Stable?

[Toto123456]

So I tried to overclock my cpu to 4.4GHz (i5 4690k + MSI z87-G45) it is stable in Intel Extreme Tuning Utility and AIDA64 for 12 hours, but it will not survive 10 minutes on Prime95 large ftt. why is this? does this mean it is stable or not?

 

Also why am I keep getting bad chips from intel, my 4670k died and this one is not even a great overclocker either

 

Settings

Core ratio multiplier 44 Fixed mode

Core voltage @ 1.27V

Dram Freq: DDR3 1333MHz

Dram Voltage: 1.5

temp 30C idle, 65max under full load

[ZetZet]

Haswell doesn't like prime.

[gramzon]

I'm not an expert at overclocking, but from what I've read, you shouldn't use Prime95 on Haswell chips as they draw too much voltage. If it's stable on aida64 it should be fine.

[Sauron]

I would consider it stable where no stress test fails. If prime95 fails, tune it down until it works. It's like graphics cards, sometimes they work in some benchmarks and not in others, but you don't want to risk it crashing in a game you didn't test it with every 2 days. Try raising the voltage a bit to see what happens, but I wouldn't go over 1.3.

[A Bubble]

Try with OCCT.

[Toto123456]

I would consider it stable where no stress test fails. If prime95 fails, tune it down until it works. It's like graphics cards, sometimes they work in some benchmarks and not in others, but you don't want to risk it crashing in a game you didn't test it with every 2 days. Try raising the voltage a bit to see what happens, but I wouldn't go over 1.3.

Okay but my temps are really really good. even if I push to 4.5ghz 1.34V my temps are about 75-82 under maximum load. am I safe? (I am quite happy with 4.4 though). Also at 4.4ghz I raised my voltage to 1.3V and it still crash on prime95 but everything else was fine?

 

Haswell doesn't like prime.

Is there such thing as haswell doesn't like prime?

[Paralectic]

Haswell doesn't like prime.

Exactly this, according to the experiences of people with Prime and Haswell CPUs.

[FireFox]

Stick with AIDA 64 mate

[Sauron]

Okay but my temps are really really good. even if I push to 4.5ghz 1.34V my temps are about 75-82 under maximum load. am I safe? (I am quite happy with 4.4 though). Also at 4.4ghz I raised my voltage to 1.3V and it still crash on prime95 but everything else was fine?

 

Unfortunately temperatures aren't everything. Safe, yes of course, stable, not necessarily. And yes, apparently Haswell doesn't like prime, but unfortunately if it doesn't like prime there's a chance it won't like other ultra cpu intensive programs either and crash. You *should* be fine even at 4.5 with those temperatures, but it COULD just randomly crash under heavy workload and if you're using the pc for work that's not ideal. It's your choice, if you accept the risk then more power to you. I suggest you try to keep it at 4.4 and in the next week abuse it as much as you can without running benchmarks. Just use it as hard as you can with multiple sessions of heavy video editing, 24/7 operation etc. If nothing strange happens you should be good to go.

[harrynowl]

Haswell chips with Prime95 apparently draw more load through the integrated VRM than they should or something, if it's stable when you're using it then that's good. But if you do a 2 hour render and get a blue screen 95 minutes in you probably know where to look.

[Toto123456]

Thank you very much guys!! much appreciated!!!!