CPU Temperature concerns

[Elthrael]

I recently got a PC with the following specs

i7 8700k
ASUS PRIME Z370-A
G.Skill Ripjaws 16GB 3200MHz CL16
(still waiting for gfx card, using integrated Intel gfx right now)
Fractal Design R6 Tempered Glass case
CoolerMaster MasterLiquid 240 AIO watercooling system

Idle temperature is OK (30-32°C), but when I use CPU-Z to stress-test my CPU and CoreTemp to measure the temperatures, it reads temperatures up to 90°C - as far as I know, that's entering "dangerous" territory.

I have three 120mm case fans (two front, one back) set to run at 100% when the processor reaches 60°C and a closed-loop AIO watercooler with two 120mm fans (top mounted), also set to run at 100% when the processor reaches 55°C. The CPU isn't overclocked - I am, however, using it as the graphics card on an ASUS ROG Swift PG279Q at 1440p until my 1080 Ti/2080 arrives (haven't decided yet). I've compared some tests on the web and folks are getting around 80°C at full stress. I feel like I shouldn't be running that hot with 3 fans and watercooling.

Is the fact that I'm using the processors integrated graphics contributing the extra 10°C? Or is something wrong and I should check out my cooling system?

[Bad 💀 Motha]

Still is kind high given the OP's cooling. Manually control all your fans yourself, crank em up and then re-run such tests.

Stress tests are going to put the CPU to the max, so this is rather normal though. Games will not do that.

[TehSpoopyKitteh]

Impending Rentacle Tape eredeti hozzászólása:

Bad_Motha eredeti hozzászólása:

I smell a faulty cooler. Not even a cheaper 120mm AIO-LC should have your CPU running this hot with just Gaming.

Read the above posts. They're saying it's 90c (just 1 core) and the others 83c-87c, only when under full load, not gaming.

Those are still completly unssafe and abnormal temperatures. I am OCing my Core i7-6700K at 4.4GHz 24/7 365....and it doesn't even reach 80C...let alone anything above that, under gaming load. Note I am not using an AIO. Just a massive Heat Sink and fan system that barely leaves me room for any side case fans xD

The highest I have seen mine go at that speed during a stress test is 75C peak, 70 average on full core use, and 65C and 70C peak with multi-threeaded modes.

[Bad 💀 Motha]

Yea 90*C on a 240 or 280 mm AIO, something is wrong with the cooler.
Buy a good one.

As with a good 240 or 280mm cooler, you should never see 80+ *C really if even that high.
As you should have enough breathing room with such coolers to OC to around 4.6 - 5.0 Ghz and still not go above 90*C even then.

[TehSpoopyKitteh]

Bad_Motha eredeti hozzászólása:

Yea 90*C on a 240 or 280 mm AIO, something is wrong with the cooler.
Buy a good one.

As with a good 240 or 280mm cooler, you should never see 80+ *C really if even that high.
As you should have enough breathing room with such coolers to OC to around 4.6 - 5.0 Ghz and still not go above 90*C even then.

There are three distinct possibilities.

!. The OP messed with voltages.
2. The AIO is borked.
3. Both 1 and 2.

[Bad 💀 Motha]

Try manually lowering the CPU VCore Voltage as low as you can while having the system overall still maintain stability. You should never have to go disable SpeedStep or Turbo to achieve this.

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

The Spoopy Kitteh eredeti hozzászólása:

Those are still completly unssafe and abnormal temperatures. I am OCing my Core i7-6700K at 4.4GHz 24/7 365....and it doesn't even reach 80C...let alone anything above that, under gaming load. Note I am not using an AIO. Just a massive Heat Sink and fan system that barely leaves me room for any side case fans xD

The highest I have seen min go at that speed during a stress test is 75C peak, 70 average on full core use, and 65C and 70C peak with multi-threeaded modes.

See Intel specifications for the 8700K here: https://ark.intel.com/products/126684/Intel-Core-i7-8700K-Processor-12M-Cache-up-to-4_70-GHz And scroll down to "Package Specifications" and then read where it says "TJUNCTION 100°C"

Now, compare that to your processor, the 6700K: https://ark.intel.com/products/88195/Intel-Core-i7-6700K-Processor-8M-Cache-up-to-4_20-GHz Then scroll down and see Package Specifications where it says "TCASE 64°C".

So technically, any temperature above 64c for your 6700K -IS- dangerous, and can damage your processor. And 80c or 90c would definitely be extremely dangerous, for your processor.

However none of this is true for the 8700K. For the 8700K, such temperatures are completely normal, and in fact completely safe and harmless.

Also the 8700K is a 6-core chip and your 6700K is a 4-core chip. So of course the 8700K is going to run hotter than your chip.

[Bad 💀 Motha]

still clearly something wrong when you're hitting 90*C like that, on stock settings, on a 240mm LC. That's not leaving any breathing room for OC'ing, I can assure you. Seriously, buy a better CPU Cooler.

All the i7 though are "fine" under 90-95*C though; even the 6700K

CPU-Z also doesn't run those tests long enough, so that right there also spells trouble.

Run Prime95 or IntelBurnTest for 20-30 mins non-stop and see how it does.

[[☥] - CJ -]

Tcase is the max temp at the IHS level
Tjunction is the max temp at the die level


If youd actually click the little ? it says what it is.

And No, 80s and 90s ARE NOT Normal, especially when it comes to an AIO that size, it doesnt matter if its a 4 core or a 6 core

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

☥ - CJ - eredeti hozzászólása:

Tcase and Core temps are NOT the same thing
Tcase is the max temp at the IHS level
Tjunction is the max temp at the die level


If youd actually click the little ? it says what it is.

And No, 80s and 90s ARE NOT Normal, especially when it comes to an AIO that size, it doesnt matter if its a 4 core or a 6 core

You can twist your words around to mean what ever you want. The actual throttle temperature for 8700K is 100c per Intel. You can run your 8700K chip @ 100c 24-7-365 under 100% load non-stop for the entire duration of the warranty period, at 100c, and no damage will occur to the chip and it will still be covered under Intel factory warranty. It's a fact and it's right there in black and white.

[[☥] - CJ -]

How am i twisting any words around when it states what they are for in your words, BLACK AND WHITE

No one is dumb enough to actually think that running a CPU that hot is acceptable, it doesnt matter if a CPU can handle it or not, thats something you DONT DO

[_I_]

at 100c it will throttle
so no it cant run at 100c and full clock and load

with the 240mm aio it definately has problems if its going over 80c

[Bad 💀 Motha]

After looking at the tech reviews, yea this AIO cooler the OP has chosen just 100% sux
It's simply not good enough for an 8700K, simply put.

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

☥ - CJ - eredeti hozzászólása:

How am i twisting any words around when it states what they are for in your words, BLACK AND WHITE

No one is dumb enough to actually think that running a CPU that hot is acceptable, it doesnt matter if a CPU can handle it or not, thats something you DONT DO

8700K's just throttle clocks back and run just happily fine. Even if hot. They'll last at least 2-3 years til the end of the warranty period, even if 100c, it won't kill em. Most people replace their computer at least every 3 years if not 2. It's all fine, nothing catastrophic will happen. Intel thermal protection will shut off the computer before anything actually destructive happens. As long as the computer's not shutting off just run it and enjoy. The years of chips dying due to heat within the first 5 years are long behind us now.

[Bad 💀 Motha]

Defeats the purpose of getting liquid cooling.

[Elthrael]

Bad_Motha eredeti hozzászólása:

After looking at the tech reviews, yea this AIO cooler the OP has chosen just 100% sux
It's simply not good enough for an 8700K, simply put.

I don't know where you got this information from, of all the AIOs in this price range, the one I chose got consistently good reviews with the main complaints being silly stuff like "hoses are a bit short" and "no RGB lighting". I'm not saying this just to counter you or act proud of my gear or anything, but I just don't see any reviews that would indicate it's not a good cooler.

I also checked some reviews of the i7 8700k and one review got pretty much the same temperatures as I do with a 420mm (3x140mm) Eisbaer cooler... I don't know.

The Spoopy Kitteh eredeti hozzászólása:

Bad_Motha eredeti hozzászólása:

Yea 90*C on a 240 or 280 mm AIO, something is wrong with the cooler.
Buy a good one.

As with a good 240 or 280mm cooler, you should never see 80+ *C really if even that high.
As you should have enough breathing room with such coolers to OC to around 4.6 - 5.0 Ghz and still not go above 90*C even then.

There are three distinct possibilities.

!. The OP messed with voltages.
2. The AIO is borked.
3. Both 1 and 2.

1) I did no such thing - in fact, I reset the BIOS to its defaults and decreased the threshold at which my fans run at 100% (from 70°C to 60°C). Voltages were not touched.

2.) Could be, but if the AIO was really a lemon I'd say I wouldn't get idle temperatures of 30°C.

There is one thing that bugs me though. My MoBo only shows CPU FAN and CHA2 FAN. I checked and the store where I had the machine built connected the CPU FAN and CHA2 FAN and the CHA1 FAN and AIO PUMP connections are empty. The AIO still works though, the fans are spinning and I can hear the pump, well, pumping. Thing is, my case has a fan hub and god knows what's connected there - would that be the reason I'm not seeing all the fans?