4770k stock cooler very high tempratures

classna · May 7, 2016

My core i7 4770k reaches 100 °C when i run Asus realbench. My bios settings are set to default and everything is stock. My temps drop to 35 idle and 70 load when i install my cooler master napton 280L cooler. I tried overclocking it to 4.2ghz but i can't get it stable below 1.3 vcore. Did i get a bad chip? it is still under warranty so i can return it but is 100 °C stock cooler temps a reason good enough to ask for replacement?

Eximo · May 7, 2016

4770k wasn't really known for reaching high overclocks in general. i7-4790k solved most of the problems it had. 70C under a benchmark with a water cooler is quite good really.

1.3 is about the safe maximum. The stock cooler is underwhelming at all times.

classna · May 7, 2016

Do you think i should return it? 100 C stock is quite high even if i choose not to overclock.

lodders · May 7, 2016

You can't RMI a chip because it doesn't overclock very well, only if it doesn't work.
Anyway, overclocking automatically ends the warranty.
I was unlucky with a CPU a few years back- I have a 3570k on a nice motherboard with a big cooler, but it will not go faster than 4.1GHz.
just have to suck it up, can't be lucky every time

classna · May 7, 2016

I agree you can't RMA if it doesn't overclock but it is supposed to run stable at stock settings. 100C stock is acceptable ?

lodders · May 7, 2016

All 4770k run really hot with the stock cooler. Not a reason to RMI.
Almost everybody uses an aftermarket cooler.
Many people are surprised I managed to overclock an i5 to 4.2Ghz on the stock cooler
(I did it by undervolting to 1.09V)

classna · May 7, 2016

So i should just install my liquid cooler and stay at stock 3.5ghz? The whole point of buying a "K" variant, after market cooler and highend mobo was to overclock my system. I think i got very unlucky.

lodders · May 7, 2016

You might get an overclock to 4Ghz at 1.3V.
That will still be a pretty fast PC......

Eximo · May 9, 2016

My chip is happy to run at 100C at 4.5Ghz, I don't let it do it since it takes 1.35 volts, but instead settled on 1.3 volts for 4.3Ghz. This puts peaks at around 71C with a pretty hefty water cooling loop.

As I said, 70C under a benchmark load is quite good for an i7-4770k. Perfectly safe for daily use up to about 85C, so you have a little room for overclocking.

If it is a recent purchase, just replace it with a i7-4790k and call it a day. 4.4Ghz out of the box.

classna · May 9, 2016

4.2 ghz at 1.3v safe for 24/7 use if i keep my temps below 85c load? wouldn't it reduce the lifespan of my cpu?

Eximo · May 9, 2016

Not significantly. How long are you planning on keeping it?

I've had mine going on 3 years, no signs of degradation yet.

I'll probably keep it up through a Kaby-Lake/Z270 re-build which will give it good 4+ year run. Looking forward to some of the I/O potental with M.2 slots, USB 3.1, and Thunderbolt 3.

lodders · May 9, 2016

classna :

I would say 1.3V is about the upper sensible Vcore level.
My son is gaming on an overclocked computer which is 7 years old.... if you want your CPU to last as long as this, you might settle for 4.1Ghz at 1.25V.

classna · May 10, 2016

After putting my water cooler back on, my system at 4.1Ghz and 1.25V peaks out around 70C with 65C average during Intel Extreme tuning stress test. I ran it for only 15 minutes but i am going to give it another 2 hour run. If it remains stable, should i stick with 4.1 and call it a day?

Eximo · May 10, 2016

Seems like you have a little more room, but if you are satisfied then it is fine.

classna · May 10, 2016

If i go for 4.2ghz, i have to crank up my vcore to 1.3v that i am not really comfortable with. I did try 1.28v but it crashed after a few hours of stress test.

Zerk2012 · May 10, 2016

My motherboard default vcore was1.27 for my 4790K. Using a Cryorig R1 cooler I'm now at 4.6 1.22 volts cool 72C running OCCT

Eximo · May 10, 2016

classna :

Have you been modifying any other voltages at all? As you increase the core voltage VIN needs to be increased as well. Should be at least 1.7 for 4+Ghz and 1.8 or so for 4.3Ghz and up.

Eximo · May 10, 2016

Zerk2012 :

Like comparing Red Delicious to Granny Smith...

i7-4790k doesn't have the weird temperature and stability problems that the average i7-4770k has. Devil's Canyon is basically a binned chip with a better Thermal paste between the IC and the heat spreader. (Still tempted to crack mine open and replace it, or just run delidded.)

classna · May 11, 2016

Eximo :

I set my VIN to 1.9v once but it didn't help stabilize the system so it is back to default 1.7ish. Right now my system is stable at 4.1Ghz with 1.25v. Ran realbench and IETU for two hours and temps stayed under 70 °C with a couple of spikes to 72 °. I have since set my vcore to adaptive with turbo to 1.25v to utilize power saving features of hasewell. I am going to give VIN another try and see if i can go up to 4.2 or 3

4770k stock cooler very high tempratures

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