Phenom II 945 possible overheating

Lakiza · Mar 4, 2015

Recently i upgraded my CPU, going from Athlon II x4 640(which was causing lag in some games and overall bad performance) to Phenom II 945 3.0Ghz 125W TDP. Now i know that this cpu has 30W more than the Athlon, but its temperatures are making me a bit uncomfortable.

I have tried my friends 945 but the 95w edition and i liked it, and with my Raijintek Themis cooler its core temp never got higher than 40 degrees celsius and 27-29 idle (even on a stress test on Prime95). Same was for my Athlon
So i decided to get one since it was good, but they don't make them anymore, so i got what i found, and it was a used 945 125w, slightly older than 95w edition. I've tested it on the owners computer with stock cooling and on max it got 55 degrees and idles at 40.

Now whats currently bugging me a lot, is that on my aftermarket cooling i get nearly the same temps and the core temp is always near or above the socket temp. It idles the same as the socket which is 40 degrees and jumps up to 48 instantly even on minor tasks, and on stress test it goes to about 55 degrees. And it's really hot inside(its not a bug where it displays wrong temps).

I wanna hear your opinions on this, and gonna do some searching and testing(refitting it, reseting bios, changing thermal paste although i did it two times already), but first of all i wanna know if this is a problem or is it normal.

Thanks in advance

thx1138v2 · Mar 4, 2015

I'm running a Phenom II 555 dual core so it's not exactly the same but may be worth comparing. The stated TDP is 80W and I'm not overclocking. Idle runs 28-30C and light load (browsing etc) runs around 38-40C as reported by CPUID.

CPUID software reports TMPIN0 at 38-40C and TMPIN1 at 28-30C. I'm not sure which is the socket temp.

I've got my alarm set at 65C and haven't run into a problem or even an alarm. 70C is the spec stated max.

With all that said, my opinion is you can't have too much cooling because heat causes permanent damage. Once there's a little overheating you can expect a lot more in short order.

thx1138v2 · Mar 4, 2015

One other thing to keep in mind: all temperatures are going to depend on the ambient temperatures. It's winter so relatively cool here in the northern hemisphere. Depending on how your thermostat gets adjusted for summertime cooling you might have higher ambient temps in the summer so should consider how that would affect your cooling.

Lakiza · Mar 4, 2015

thx1138v2 :

Well, the the temperature in my room is low, since i sleep in it, at day 21-23 degrees C and 16-18 at night. But that doesn't really matter since it's nowhere near the CPU temp and in the exact same case, config and room were other CPUs running without a problem. Its worth mentioning that i tested it on prime95 for 24 hours non-stop and it never failed and maxed at 54 degrees C. Its probably why the newer edition had improved efficiency(95w - same performance) and had a new thermal design(70 deg max instead of 62) which overall did improve the cpu since you have it less heating and more heat resistance so you no longer need to worry about it. Will continue investigating

Lakiza · Mar 5, 2015

dirtyferret :

Thank you, i was getting worried about it. Now im planing on reworking my old pc case in which my components are currently to a modern "PSU on the bottom" case, so that the hot air from the CPU cooler goes up directly out of the case instead of going through the PSU. Plus im gonna add some fans for better airflow and im positively sure that will help a lot, since when i run a stress test and open the case mid-testing, the core and socket temp go down for 3-5 degrees.
Cheers

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