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Cpu temperature question

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August 20, 2013 1:37:24 PM

Just built my pc and boots in 5 seconds(SO HYPED).

I got the 4770k 3.5 ghz and the noctua NH - u12S. I heard it's a good heat sink.

I average idle between 35-42degrees. Haven't tried at high tasks yet, but wanted to know if this is normal.

1)should I switch to performance mode from UEFI?

2)I have a z87 sabertooth that has thermal armor. This board has some vents. Should I consider opening them? They cover the heat sinks of the motherboard.

3)What is the recommended temp. to max out to on CPU before getting worried?

4)Could it be from the thermal paste? I applied it in the middle of CPU in a dot sort-of way. Kind of like a pea, but a little bit smaller. Not sure if I should have spread it with a card-like thing.

Thank you very much in advance for your time!
a b à CPUs
August 20, 2013 1:46:35 PM

1) It depends, on my old pc, I get the same performance on turbo (performance) than I do on the (cant remember name but its the opposite mode) opposite mode.
2) Yes, you'll want to open them
3) 80 degrees.
4) I'm unsure never used that cooler. You could try.
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a b à CPUs
August 20, 2013 1:51:54 PM

4)some people spread thermal compound (i do and have had nothing but good results using Arctic Silver 5) others just use the pea method. both prly work fine

3)don't let ur CPU get past 80C. if it goes up in the 70's or even touches 80C during heavy load (prime95) that's fine, but if it stays there regularly, there's an issue with ur cooling

2) leave the mobo alone. lol. don't alter it's heatspreaders. they're specifically designed the way they are

1) switch to performance if you want, but i doubt u'll need it unless you OC that CPU (you should be able to get to 4.2GHz on the CPU)
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a b à CPUs
August 20, 2013 2:44:48 PM

1) Temps: Should be around 5C->10C above ambient temps, so if Room temp is around 22 C (72F) then a good idle temp would be around 27-> 32 C. Room around 77F (25C then good = 30->35C. Note if your Thermostat shows 77 F and your computer sits on the floor the air intake could be anywhere' from 2 -> 5 F Lower.
... But then Idle is not what you need to look at, need to run say Prime 95, only need to run about 15 Min to get a good feel for max temps.
.. Your HSF is pretty good and I think unless your room is WARM, your readings should be lower.
SEE: http://www.anandtech.com/show/2485/5
You will NOT get that low as the "test" cpu is a lowely E6800. Plus didn't check to see what their ambient temp was.

3) The CPU will start to throttle Back at about 100 C, and Turn system off at about 125C. My personal preference is to keep temps in the low 70's (My systems I do not go above mid to upper 60's (Have a i5-2500K OCed to 4.2 - Its stable upto 4.8 and max temps upper 60's - But could not see enough of a diff between 4.8 and 4.2 so backed off to 4.2). 80->85 C Temps for several hours to verify stability of System using prime 95 (Must do if OC) is FINE.

4). You have a "Flat bottom" HS, so yes a Pea size is close to the right amount. I put the paste in the center (differ from most as I apply to the CPU NOT the HS) and then with my finger (Covered with latex glove) spread it. Too Much is Bad for thermal conductivity.
.. For the HSFs with valleys next to the heat pips I fill the "valleys" then level with a Credit card, then pretend it's a Flat surface and Follow above method.
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August 20, 2013 8:45:15 PM

RetiredChief said:
1) Temps: Should be around 5C->10C above ambient temps, so if Room temp is around 22 C (72F) then a good idle temp would be around 27-> 32 C. Room around 77F (25C then good = 30->35C. Note if your Thermostat shows 77 F and your computer sits on the floor the air intake could be anywhere' from 2 -> 5 F Lower.
... But then Idle is not what you need to look at, need to run say Prime 95, only need to run about 15 Min to get a good feel for max temps.
.. Your HSF is pretty good and I think unless your room is WARM, your readings should be lower.
SEE: http://www.anandtech.com/show/2485/5
You will NOT get that low as the "test" cpu is a lowely E6800. Plus didn't check to see what their ambient temp was.

3) The CPU will start to throttle Back at about 100 C, and Turn system off at about 125C. My personal preference is to keep temps in the low 70's (My systems I do not go above mid to upper 60's (Have a i5-2500K OCed to 4.2 - Its stable upto 4.8 and max temps upper 60's - But could not see enough of a diff between 4.8 and 4.2 so backed off to 4.2). 80->85 C Temps for several hours to verify stability of System using prime 95 (Must do if OC) is FINE.

4). You have a "Flat bottom" HS, so yes a Pea size is close to the right amount. I put the paste in the center (differ from most as I apply to the CPU NOT the HS) and then with my finger (Covered with latex glove) spread it. Too Much is Bad for thermal conductivity.
.. For the HSFs with valleys next to the heat pips I fill the "valleys" then level with a Credit card, then pretend it's a Flat surface and Follow above method.


Didn't consider room temperature as a factor. Here it's pretty warm(around 30-32 degrees Celsius). I'll try and lower room temperatures as a whole(air conditioner). But first I'll test out prime 95, see how much it peaks. Nice catch! Thank you very much! :) 
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a b à CPUs
August 21, 2013 5:04:39 AM

For Room temp of approx 31, Your Idle temps are FINE.
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