4690k high idle temps: 40c in Bios with EVO 212 cooler

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rubbed

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I bought a cooler master 212 EVO for use with my new 4690k and have re-applied the thermal paste twice.

My idle temps in the bios are 40c and its showing the same (37-38c) in speedfan.
Load temps don't go above 61c.

I really want to reduce the idle temps, as they were around 25-30c on my last CPU (i5 750) and I am also using a very good CPU cooler so I don't understand.

Ambient room temperature is 22c.
System temp is 27c.

38c00b8075f086afae20797496ac5512.png


Even when running at 800MHz with low voltage, the temps are still quite high when idle!

Can anyone help?
 
Solution
synphul
Bios idle will be higher than idle at the desktop since it's not using speedstep in the bios and dropping down the multiplier and power consumption.

Try making sure you're also tightening the center knurled screw in the middle of the 212 evo, it's under the cooling fins on top of the cooler base and can help the cooler increase mounting pressure for a good fit. Before I tightened mine the cooler was extremely sloppy and a light pressure against the cooler tower turning it allowed it to twist freely indicating low contact pressure.

Make sure idle is truly idle, that nothing is running in the background and cpu usage is around 3% or less for a good 4-5min. Open browsers can sometimes have the cpu at 12-20% usage which isn't idle...
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ingtar33

ingtar33

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Dec 17, 2012
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my i5-4690k is idling at 42C right now, and i have a much better cpu cooler. granted I have a light overclock on it (4.2ghz); but the reality is haswell run hot, and while the 212 evo is a great cpu cooleron a price/performance metric, it isn't really a high end cpu cooler; combining your average performing cpu cooler with a hot running haswell and i'd say your temps are pretty normal.

you only really have an issue if the load temps are hitting 90C

 
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synphul

synphul

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Mar 11, 2011
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Bios idle will be higher than idle at the desktop since it's not using speedstep in the bios and dropping down the multiplier and power consumption.

Try making sure you're also tightening the center knurled screw in the middle of the 212 evo, it's under the cooling fins on top of the cooler base and can help the cooler increase mounting pressure for a good fit. Before I tightened mine the cooler was extremely sloppy and a light pressure against the cooler tower turning it allowed it to twist freely indicating low contact pressure.

Make sure idle is truly idle, that nothing is running in the background and cpu usage is around 3% or less for a good 4-5min. Open browsers can sometimes have the cpu at 12-20% usage which isn't idle. Looking at your realtemp screenshot the cpu is at over 5% usage and at over 1200mhz, idle it should be 800mhz (x8 multiplier x 100mhz default bclk).

Mine gets up to the mid 30's c around 1200-1300mhz but stays around 31-32c at 800mhz with an ambient room temp of 23.6c but that's using a larger cooler than the 212 evo also.
 
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Solution
R

rubbed

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Hey, I didn't actually tighten the screw in the middle.. how is that even possible!? I can't even reach it.
It's a bit of a wonky design as it took me a while to align the centre screw in properly in the hole. I'll open my case and take another look at that screw.
 
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synphul

synphul

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Mar 11, 2011
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If I recall correctly I tightened it with the cpu installed and cooler mounted to the motherboard but outside of the case. It was a bear. I think I poked an index finger in from either side and using both fingertips rotated it. Then I installed the ram and then finally the cooling fan since you have to take the cooling fan off to tighten 2 of the 4 mounting screws anyway.

If it's too tight with the cooler fully mounted you might have to loosen the mounting screws some, rotate the center nut/screw to get a little more pressure then re-tighten the mounting screws. Definitely not the easiest design out there and part of the reason I didn't care for the cooler. Overall it does cool decent, it's cheap and once mounted it's not like it's a weekly procedure but initially it can be a pain. If I had to do it all over again I'd go with a different cooler personally just to avoid fiddling with it.
 
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R

rubbed

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Thanks, I tightened the middle screw as best I could with everything still in place inside my case.
Temps have since dropped to about 29c-35c.
All cores show 29-30c except the first core (or reading) which shows 35c on RealTemps.

You are right about the cooler, wasn't the best install and definitely a bit of a pain!
 
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