Can stock fan keep Intel i74790 below 48c under load?

[keynesabc]

If I want to keep it always below 48c. Is liquid cooler a must? what brand/model do you recommend?
My Budget: $50
Can't buy a good one?

Thanks.

 

[celtic_warrior99]

Hi, the stock cooler isnt too great and the CPU will probably get into the high 60s/70s degrees celcius. I would recommend a Cooler Master Hyper 212X, its a great cooler and is very affordable. And no, yuo dont NEED watercooling.

 

[SinxarKnights]

Best budget cooler right now (Cryorig H7): http://www.newegg.com/Product/Product.aspx?Item=9SIA4UF2DZ6565

 

[Ecky]

Why do you want to say below 48c?

No cooler, liquid or air, can keep a 4790K under 48c under an AVX load, but that's alright because Intel rates the CPU up to 100c before it throttles, and 130c before it shuts down. It will run safely at 95c for years, possibly even decades, definitely far longer than it will be useful. Don't obsess over temps, it's a virtually meaningless number as long as your PC is stable.

 

[lodders]

Ecky is absolutely correct about temperatures. 48C is a meaningless target
As you can see from my signature, my stock cooler is keeping my 4690k temperature below 80C even with it overclocked.
A lot of people think you can't overclock an i5 on the stock cooler.
I don't want to go any faster, because I am not comfortable running my CPU hotter than this.
Having said that, the i7 4790k works harder than my i5 when it is hyperthreading, and your stock speed is 4Ghz....
So I think the stock cooler will probably keep your i7 between 80c and 90c
most people would fit an aftermarket cooler to get their temperature below 75c.

 

[synphul]

I'd agree that 48c is an unrealistic or unnecessary target for full load. However I'd disagree that it's 'safe to run at 95c for years' which contradicts intel's own specifications.

Tcase for the 4790 is 72.72c and since core temps run 5c hotter than tcase that results in a max 'safe' temp for everyday use at 77c - not 95c+.
http://ark.intel.com/products/80806/Intel-Core-i7-4790-Processor-8M-Cache-up-to-4_00-GHz

As intel states - "Case Temperature is the maximum temperature allowed at the processor Integrated Heat Spreader (IHS)." The definition for their tcase spec listed at ark.

Please have a read here.
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Yes it won't throttle until 100c but that in no way means 95 is 'safe' in any way. Running at those sort of temps can result in damage according to intel and I'm sure there's a reason their engineers have set those thresholds.

 

[TJ Hooker]

Tcase for the 4790 is 72.72c and since core temps run 5c hotter than tcase that results in a max 'safe' temp for everyday use at 77c - not 95c+.
http://ark.intel.com/products/80806/Intel-Core-i7-4790-Processor-8M-Cache-up-to-4_00-GHz

As intel states - "Case Temperature is the maximum temperature allowed at the processor Integrated Heat Spreader (IHS)." The definition for their tcase spec listed at ark.

Please have a read here.
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

I read the parts of that article relating to Tcase vs Tjunction, and I have to say, I'm a little skeptical. He says that the 5 C offset between the two readings is demonstrated in Figure 5 of this link: http://arxiv.org/ftp/arxiv/papers/0709/0709.1861.pdf, but I read that PDF (and obviously looked at Figure 5), and I saw nothing in there that supports his claim.

 

[Ecky]

T J Hooker, I came to the same conclusion.

Additionally, Intel rates the max temperature of their mobile CPUs by Tjunction rather than Tcase, and they're physically the same chip as desktop versions. Tjunction is 100c for Haswell.

 

[Ecky]

I'd like to add that, when that paper was written 10 years ago, Intel was still using solder between the die and IHS, so 5c might have been a reasonable number at the time. Since then, Intel has switched to thermal paste, and the heat density has risen significantly.

 

[keynesabc]

I'd agree that 48c is an unrealistic or unnecessary target for full load. However I'd disagree that it's 'safe to run at 95c for years' which contradicts intel's own specifications.

Tcase for the 4790 is 72.72c and since core temps run 5c hotter than tcase that results in a max 'safe' temp for everyday use at 77c - not 95c+.
http://ark.intel.com/products/80806/Intel-Core-i7-4790-Processor-8M-Cache-up-to-4_00-GHz

As intel states - "Case Temperature is the maximum temperature allowed at the processor Integrated Heat Spreader (IHS)." The definition for their tcase spec listed at ark.

Please have a read here.
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Yes it won't throttle until 100c but that in no way means 95 is 'safe' in any way. Running at those sort of temps can result in damage according to intel and I'm sure there's a reason their engineers have set those thresholds.

Your PC can work fast even the cores temp above 60c ? mine will become slow after above 50c.

 

[Ecky]

It shouldn't run slow above 60c, your CPU should not throttle until 100c.

 

[keynesabc]

It shouldn't run slow above 60c, your CPU should not throttle until 100c.

your PC is fast when CPU above 60c ?

 

[Ecky]

Yes. There's no reason a 4790K should slow down above 60c.

Be aware that 60c on one CPU is not the same as 60c on another, because the temperature sensors are in different places.

 

[Wayfall]

Yes. There's no reason a 4790K should slow down above 60c.

Be aware that 60c on one CPU is not the same as 60c on another, because the temperature sensors are in different places.

What do you mean by that? Do you mind explaining this, thanks.

 

[Ecky]

Let's say you compare the temps on an FX-8350 to the temps on an i7 4790K. The FX CPU has a maximum temperature of around 70c, while the i7 has a max temp of around 100c. Your FX CPU is running at 65c, whereas your i7 is running at 75c. Which one is hotter?

You actually don't really know. Intel's temperature sensor is closer to hot parts of the CPU, so the hottest part of the FX might actually be hotter. All you can really say is that the FX is closer to its maximum temperature than the i7 is.

 

[Wayfall]

I have an i7 4790K and yesterday I installed it and it took a while to sort the temps out.

When I did a stress test the first time I installed it (mind you I have a Cooler Master TX3 on it) and stress tested it was throttling 1-14% at 90C at all cores 100%.

I eventually figure out that the cooler wasn't making full contact and the paste wasnt that good so I reinstalled it with new paste and It fixed the problems and now it runs a 63C around about while playing Witcher 3 every high with texture on ultra at 60fps 1080p with about 50% load. Before you ask about 100% temps I did a stress test and the temp never went past 75C which is really good, thou I wont ever be using my CPU the intensively anyways.

But what I'm saying is that it 'began' to throttle at 90% so at 100C that's when it would shut off probably to stop itself from melting a horrible death.