CPU ran with no cooler/heat sink for around 15min and 15sec on prime95 extreme

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Ximerous

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Mar 12, 2014
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Long story short, my i7 4770k didn't have it's cooler on and I turned it on, watched some YouTube worked fine, turned on prime 95 the max heat test one still ran fine opened my cpu thermometer and the shut it allll down and was like o ya cpu cooler not on. So that was like two weeks ago and my cpu still works but should I expect lower life, higher temps, more volt pull? I got a new CPU cooler and temps are a little high for the CPU/setup so I was just looking to see if that's why.

Idle CPU temp is usually 38-40. My GPU1 is cooler most of the time idling at 35. Load temps will be added

Specs
Cosmos II Case
i7 4770k
Kraken x61 cpu AIO
MSI Z97 G45 gaming
16GB(8x2) DDR3 2400 Corsair dominator plats
Gpu1 evga gtx 980ti hybrid
Gpu2 gtx 660 ti
Evga 850w psu gold rating one
A hgst hdd
A Samsung ssd
Lots of fans, + pressure I believe
 
Solution
synphul
Hard to say, the cpu was likely throttling during the stress test to prevent damage. I'm surprised it didn't shut down. I don't know of any hard factual rule to go by as to how long you can run a cpu like that, since it powers on and everything it's probably ok. All you can do is use it.

What version of prime95 were you running and what temps were you getting with the x61 cooler? What kind of ambient room temps? You can try reseating the cooler and cleaning off the thermal paste and reapplying, see if that helps some. Maybe the waterblock got tilted a little bit while tightening it down to the cpu or wasn't making as good of contact as it could.

Have a read here, some good information on cpu temps and stressing with p95 (version...
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synphul

synphul

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Mar 11, 2011
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Hard to say, the cpu was likely throttling during the stress test to prevent damage. I'm surprised it didn't shut down. I don't know of any hard factual rule to go by as to how long you can run a cpu like that, since it powers on and everything it's probably ok. All you can do is use it.

What version of prime95 were you running and what temps were you getting with the x61 cooler? What kind of ambient room temps? You can try reseating the cooler and cleaning off the thermal paste and reapplying, see if that helps some. Maybe the waterblock got tilted a little bit while tightening it down to the cpu or wasn't making as good of contact as it could.

Have a read here, some good information on cpu temps and stressing with p95 (version 26.6) for the i7.
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
 
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RJMadCat

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There are quite a lot of "fail safes" that should prevent your CPU from dying instantly and prevent excessive damage. It should be alright, but there is no real way of knowing apart from using it and see if your cpu does what it suppose to do. If you start having FPS problems in places wher eyou should not, it could be a bad sign, if it runs fine you should be okay.
 
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Ximerous

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I was running latest prime95(small FFTs torture test) as of October 22nd and idle temps with kraken x61 are usually 38-40 prime95 small FFTs is 80-85, but I never get there during real-life usage. Still I am pretty sure these are high for the build. Ambient temps are 26-27+ degrees c.
 
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synphul

synphul

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26-27c isn't outrageously hot for ambient temps, maybe a bit on the warmer side of 'average' depending how warm you like your pc room. For the 4770k you should try running p95 v26.6. It's not the latest version of prime95 and that article I linked to, the intel temperature guide (one of the cpu forum sticky threads) explains why it would be better to use that version rather than the latest. The temp guide has a link to v26.6.

You likely won't reach prime95 temps under regular usage, the reason for a stressful test is so you can get an idea of how your cooling handles worst case scenario. 80-85 is still a bit warm but if you're not reaching that under regular use you're probably ok. There was no mention if you overclocked your cpu or not which will make a difference on temps.

If you didn't purposely overclock it then you still may want to check bios settings. Using things like 'performance' modes in the bios is still typically an overclock setting the motherboard came with as a preset. Auto overclock or preset overclock settings tend to be more aggressive using more vcore than necessary to make sure it's stable. More vcore means more heat.
 
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Ximerous

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It has a small overclock of by Core usage multiplier - 1C:44 2C:43 3C:42 4C:41
In the last week ambient temptures have gone down a lot due to weather. Idle/load temps have dropped 8-20c depending, room stays around 20c now. Sadly this is only for the winter. But I'll check out the p95 version.
 
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