CPU Core Temp at 100C? Is OK for rendering 3d?

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mycreativepro

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I just built this yesterday. It's i7 4790K, ASROCK Extreme4 MB, Asus GTX 660 graphics, stock cpu fan, in a full size case.

I don't know if I'm using the right software, i download Core Temp, says 35C when idle but when I bring up photoshop, it jumps to about 48C. When I start working with 3d Text, it jumps to 75C and when I render it, it jumps to 100C.

Are these numbers OK? I bought all this so I can work more in 3d in Photoshop, work faster in Premiere and start learning after effects.

I should also mention, the case I bought has some sort of fan speed control as well as the power supply that I didn't expect. There are settings for Low, off and High for the Front Fans, Top Fans and Back Fan. Should I have them all on full blast? or some on low and some on high to better control the air flow? Should power supply fan be on high, how do i know what to put these on?

I have two fans in the front, two fans on the top and one fan in the back.

Any tips or suggestions are appreciated.
 
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volcanoscout
The first temp is okay, the next two are too high and the last one is WAY too high.
Even with the stock cooler, the temps should be better. Make sure that the CPU cooler is seated properly and that all four pins are fully engaged. Anything over around 85C is to be avoided, and sub-70 would be much better - that's with your chip maxed. With a temp of 100C, your chip is right on the edge of thermal throttling. Your chip will shutdown to protect itself, but that doesn't necessarily mean that it will do it quickly enough to avoid permanent damage. I'd recommend getting an aftermarket cooler as the 4790K can run hot, even if you're not overclocking. Most rendering tasks shouldn't be maxing the CPU out, but they will engage all four...
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i7Baby

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They are too high. Try getting cpu/case/package temp from bios/uefi instead. That should be 35C max idle and 50C max gaming.

My guess is that the cpu cooler isn't on right. Re-seat it with new thermal paste.

You should be able to control your fans from uefi.
 
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icraft

icraft

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It is fairly common on haswell with AVX loads. Not good though. You might want to get an aftermarket cooler and keep it around 85c max.

It is also slower because your CPU is forcing itself to run slower so it doesn't die of heat.
 
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volcanoscout

volcanoscout

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The first temp is okay, the next two are too high and the last one is WAY too high.
Even with the stock cooler, the temps should be better. Make sure that the CPU cooler is seated properly and that all four pins are fully engaged. Anything over around 85C is to be avoided, and sub-70 would be much better - that's with your chip maxed. With a temp of 100C, your chip is right on the edge of thermal throttling. Your chip will shutdown to protect itself, but that doesn't necessarily mean that it will do it quickly enough to avoid permanent damage. I'd recommend getting an aftermarket cooler as the 4790K can run hot, even if you're not overclocking. Most rendering tasks shouldn't be maxing the CPU out, but they will engage all four cores and your chip will probably be in Turbo mode, which will heat it up quickly.

For the fans, what settings you use depends on how hot your case gets. For now I would put them on high until you get control of your CPU temps and have a better feel for the system temps. The PSU fan will run itself. If you have the PSU with the fan facing up, unless your PC is sitting on carpet and assuming that you have a filtered fan grill in the bottom, you should remove it, flip it over so it's fan down, then re-secure it. That way it will be drawing cool air from outside the case and then exhausting it out the rear.

 
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mycreativepro

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Thanks for all the tips guys.

My PSU fan was facing up by the way, but I've got that turned around now. I checked the back of the MB to see if the pins looked like there were fully engaged, they weren't, so I just pushed on the pins a little. It helped only slightly, seems that it goes between 85-95C now when I'm rendering. I really don't like this push pin design. I need a quick fix, so I'll be running to best buy or this local computer store I found, to see if I might find a better fan or at least get some thermal paste.

 
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volcanoscout

volcanoscout

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Yes, the Cooler Master Hyper 212 EVO (http://pcpartpicker.com/part/cooler-master-cpu-cooler-rr212e20pkr2) is inexpensive and works very well. Just about any aftermarket cooler will work better than the stock one. The cooler should come with a tube of thermal paste - make sure you follow the directions for applying it closely, as it's pretty critical for getting the proper cooling performance.

You'll also want to make sure that your BIOS is up to date. I've never seen it, but there's been at least one recent (as in the last couple days) thread on this site referring to wonky CPU temps being caused, or at least exasperated, by an out-of-date BIOS. You can download it at the Asrock website under the support section for your mobo.
 
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