4790k Too hot?

[DukeChangWang]

I have a 4790k with a Corsair H100i closed loop cooler, but for some reason when it's idle it sits around 40 degrees Celsius, which I saw is not too high but isn't exactly normal either. Also when I record or just play PUBG, the temperature can go up to between 70 to 90 degrees. Do I need to reapply thermal paste or something? I can feel my computer getting extremely toasty in my room when I start to play games, I have a MSI Gaming 5 z97 mobo and a NZXT H440 case.

 

[loki1944]

I have a 4790k with a Corsair H100i closed loop cooler, but for some reason when it's idle it sits around 40 degrees Celsius, which I saw is not too high but isn't exactly normal either. Also when I record or just play PUBG, the temperature can go up to between 70 to 90 degrees. Do I need to reapply thermal paste or something? I can feel my computer getting extremely toasty in my room when I start to play games, I have a MSI Gaming 5 z97 mobo and a NZXT H440 case.

90C is too warm; generally I try to keep my CPUs under 90C during cpu/RAM stress testing and under 80C for gaming. Couldn't hurt to re-apply the thermal paste and reseat the heatsink; something else that can increase temps is your ambient temp, if you live somewhere that is extremely hot it can make a big difference. I had one pc that would hit 90s C in a very hot country, but would not go past 79C in my normal temperate environment.

 

[Sam Hain]

I have a 4790k with a Corsair H100i closed loop cooler, but for some reason when it's idle it sits around 40 degrees Celsius, which I saw is not too high but isn't exactly normal either. Also when I record or just play PUBG, the temperature can go up to between 70 to 90 degrees. Do I need to reapply thermal paste or something? I can feel my computer getting extremely toasty in my room when I start to play games, I have a MSI Gaming 5 z97 mobo and a NZXT H440 case.

Is this a new installation of the H100i? If so, I'd remove the block, inspect the CPU installation, as well as the paste itself. If everything is good, reinstall the block ensuring to use a cross-pattern so that there is equal tension applied until snug/not too tight.

I'm not sure what the install instructions say for the H100i, but I use the H105 and have the pump directly connected to the/a PSU power cable, so the pump is running at 100% constantly... NOT variable. This ensures a consistent pump operation and cooler temps. However, if your manual states different, it's up to you on how to proceed on this.

Also, how do you have the H100i fans directed? Intake or exhaust? Intake bringing cool air across the rad, exhaust bringing the case air through the rad. I'd advise using the fans in an intake configuration if not already doing so, as drawing hot case air across the rad is doing your AIO no favors by increasing your CPU temps even if slightly; every degree counts. But again, this is your option.

As a note I'm OC'd at 4.7 and idle at 23*C and operating during gaming averages around 47*C.

 

[R4DIO4CT1VE]

Yeah it really shouldn't get above 80c.

make sure your fans are all running properly, if they are try reapplying thermal paste.

It sounds like your ambient temps are pretty high which will mean your cpu temps will be higher no matter what you do.

 

[DukeChangWang]

I forgot to mention that I lived in Indiana, where lately the temperature has been around 75-80 Fahrenheit lately, and also that I am running dual 24" 60HZ 1080p monitors. Not sure if that really makes a difference or not though.

 

[loki1944]

Room temperature can have a significant impact, I've seen up to a 10C difference myself between running a pc in a hotter room vs a colder room. I have a dedicated A/C for my office during the summer now. For your CPU; I have an old i7 960@4.2Ghz on 1.376v that stays below 90C during stress tests and below 79C during gaming, on an H60 single rad AIO. My worst lottery CPU, an i7 4770K@4.3Ghz/1.3v, also does not get near 90C, or 80C during gaming.

The usual culprits for the CPU running too hot are:

-overclock (CPU/RAM)
-heatsink not properly seated
-thermal paste not applied well
-AIO not having something connected, or connected right

Airflow isn't really a relatively huge deal as concerns stock clocks/temps. Even in a case with poor airflow you should be below 90C (that i7 960 has poor airflow for example).

 

[Sam Hain]

Not sure if you've resolved or not... IF all of the "mechanical-workings" of the AIO (pump, paste, connections, etc.) checked good... The next thing to look at is your fan-profile(s). I'll admit, that I am not familiar with the GUI/software that Corsair uses with the H100i, as my H105 uses zero software (one of the reasons I purchased it).

But I do know this... There is no "one best custom/preset curve that fits all". Every PC is different and the environment it's in is also has a bearing/factor too, as loki1944 points out.

However, here are a couple of links that may assist you if not already familiar:

- http://forum.corsair.com/v3/showthread.php?t=132139

- https://www.youtube.com/watch?v=gDkNMElTaao

- https://www.youtube.com/watch?v=Yhl9oGorPys

Also, if you have little to no control to your ambient/room temp... It might be a good idea to look into replacing the stock cooling fans with aftermarket static-pressure ones to mitigate as best as possible. Here's some info/reviews on 120mm SP fans: https://us.hardware.info/reviews/7186/high-static-pressure-case-fans-test-the-best-120mm-and-140mm-fans-for-your-radiator-or-cpu-cooler