New GPU increases CPU Temp?

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jatexsiron

Commendable
May 5, 2016
25
0
1,540
About a week ago, I changed my old AMD HD Radeon 7850 to an ASUS ROG STRIX 1080. Prior to the upgrade, my cpu (i7 6700k, not overclocked) ran at about 25 celsius while idle, up to about 40-53 under load. I'm using a Hyper 212 evo with 1 fan to cool it.

Now, the temp idles around 25 (seemingly no different) then goes up to 55-68 under load. Is this sudden increase in temp caused by the increase in hot air dispersed from the GPU? I haven't had any issues with the temp until this new card, and I know that it isn't overheating or anything, but I'm curious as to why it suddenly jumped up 20 degrees. The fan and radiator are both working fine and they're both free of dust and other blockages.
 
Solution
Geekwad
Keeping up with a HD7850 was a stroll in the park compared to a new GTX 1080. Now that the CPU is running a real marathon, it is completely normal to see it work harder and run hotter.

68c under load is still a very acceptable result however. If you do decide to overclock though, then you'll need to look carefully at the airflow in your case and look at better cooling for the CPU possibly. I'm sure ambient temps with the GPU throwing heat do have something to do with it too, of course.
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Geekwad

Geekwad

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Sep 25, 2015
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Keeping up with a HD7850 was a stroll in the park compared to a new GTX 1080. Now that the CPU is running a real marathon, it is completely normal to see it work harder and run hotter.

68c under load is still a very acceptable result however. If you do decide to overclock though, then you'll need to look carefully at the airflow in your case and look at better cooling for the CPU possibly. I'm sure ambient temps with the GPU throwing heat do have something to do with it too, of course.
 
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Solution
W

weberdarren97

Glorious
Aug 10, 2015
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Anything under 85C is a good temperature. Technically, 90C is acceptable, but I personally don't like to see them get this hot.

Now to explain what is going on... Geekwad did a great introduction to this topic. Your more powerful shiny new graphics card is drawing more data from the CPU than the old one did. Therefore, the CPU is forced to work harder to keep up with the graphics card. It's that simple.
 
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J

jatexsiron

Commendable
May 5, 2016
25
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1,540
Yeah my thoughts exactly were that the ambient temp was increased by the gpu, which makes sense because the card does a great job redirecting heat downward, and I dont have that many fans so the heat kind of just sat there in the case. I ordered 4 fans and I'm going to position them so they suck the heat away from the graphics card and out of the case.
 
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weberdarren97

Glorious
Aug 10, 2015
8,137
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45,615


Most CM cases have spots for intake and exhaust fans. Fill up at least three intakes, then use the fourth fan for a second exhaust.
 
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