# How dangerous are high CPU temperatures?

**URL:** <https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190>\
**Category:** Factual Questions\
**Created:** [March 10, 2003, 1:19am UTC](https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190 "2003-03-10T01:19:54Z")\
**Posts on this page:** 3\
**Page:** 2

<div class="post-metadata">

**Author:** ![zwede](https://avatars.discourse-cdn.com/v4/letter/z/ac91a4/32.png) [@zwede](https://boards.straightdope.com/u/zwede)\
**Post date:** [March 11, 2003, 10:14pm UTC](https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190/21 "2003-03-11T22:14:15Z")

</div>

First you should find out if your temps are due to high case temps or an insufficient CPU heatsink. Easy way of doing this is to monitor the temp at idle and then when stressed (run a benchmark for 10-15 minutes and record the peak temp).

Next take the cover off the case and repeat the tests. If you have a large temp difference, you have airflow issues in the case. A while back I read Intels temperature management recommendations and they say to suck air in at the bottom front of the case, and then exhaust it through the power supply.

Here’s an important point: Many power supplies suck air IN, not out. So now you have a situation where room temp air is sucked into the PSU, heated up and then pumped into the case. Then you have your second fan trying to pump more air into the case. Not good.

My Antec PSU did this. I took the cover off the PSU and turned the fan around. This alone dropped my CPU temp 4C.

/Markus

---

<div class="post-metadata">

**Author:** ![ftg](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ftg/32/2801_2.png) [@ftg](https://boards.straightdope.com/u/ftg)\
**Post date:** [March 12, 2003, 12:30am UTC](https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190/22 "2003-03-12T00:30:41Z")

</div>

One point not already mentioned is a serious problem with many recent motherboards: the electrolytic capacitors in the MB. Board makers are using too cheap of caps, with too low of a temp rating. So the heat from CPUs is causing the nearby caps to fail prematurely.

Keeping the CPU well ventilated can prolong the life of your MB and reduce the problems a flaky MB can cause.

---

<div class="post-metadata">

**Author:** ![Troy\_McClure\_SF](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/troy_mcclure_sf/32/4150_2.png) [@Troy\_McClure\_SF](https://boards.straightdope.com/u/Troy_McClure_SF)\
**Post date:** [March 13, 2003, 9:12am UTC](https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190/23 "2003-03-13T09:12:22Z")

</div>

> [@](#):
>
> \*Originally posted by scm1001 \*  
> \*\*try newer gauge pro [http://www.macupdate.com/info.php/id/4512](http://www.macupdate.com/info.php/id/4512) \*\*

Many thanks, **scm1001**.

My computer has been acting up, and I suspect it’s a temperature problem.

[Previous page](https://boards.straightdope.com/t/how-dangerous-are-high-cpu-temperatures/160190.md?page=1)