I5 760 ran extremely hot during prime95

Last night while I was testing my new build, I noticed really high temperatures while my CPU was under load.

It idles around 37C.
During the prime95 benchmark (~75% load), temps were about 64C-69C.
During the prime95 blend test (100% load), temps shot up to 94C on before I turned it off right away.

I was using both RealTemp and the CPUID HW Monitor for these temperatures.

I'm running a stock heatsink that I might replace for a Cooler Master Hyper 212. I'm not planning on overclocking at all, so will this be necessary?

If I reseat the stock HSF will I need new thermal paste? Also, could the CPU be damaged from those high temperatures?
13 answers Last reply
More about extremely prime95
  1. Intel cpu can tolerate temp upto 100c before throttling itself to prevent damage.As for high temp.Did you properly installed the heatsink?Did you hear those 4 clicks when installing it?I suggest you lay your pc on its side and press the heatsink gently with you finger then run prime.If temp falls then heatsink is not properly installed.If you reinstall it it is best that you buy AS5.
  2. I made sure that the stock heatsink is all the way in. I'm still running hot at around 39-45C idle.
  3. the problem is ur using a stock cooler, which isnt made to push at 100% cpu usage on 4 cores, if u want to push ur cpu to the max, id recommand a aftermarket heatsink, such as the hyper212+ for under 30$, at newegg.com

    the stock coolers will do the job if u arent pushing it, but thats too high of a temp for that cpu ur close to the dangerous high temps, u know it aint right when ur almost reaching ur maximum cpu temperature

    cheers
  4. iceclock said:
    the problem is ur using a stock cooler, which isnt made to push at 100% cpu usage on 4 cores, if u want to push ur cpu to the max, id recommand a aftermarket heatsink, such as the hyper212+ for under 30$, at newegg.com

    the stock coolers will do the job if u arent pushing it, but thats too high of a temp for that cpu ur close to the dangerous high temps, u know it aint right when ur almost reaching ur maximum cpu temperature

    cheers

    I'm thinking about buying one of those. What thermal compound would you recommend? I see that Artic Silver 5 seems to be recommended by a lot of people.

    Also, could the CPU possibly be at all damaged from reaching those temperatures?
  5. um i wouldnt think so as long as it dint reach its maximum temperature u should be fine and artic 5 is a fine thermal paste and , also remember to remove the old thermal paste with nail polish remover, or other form of alcohol but i find nail polish remover is cheap and effective, before applying the new paste and cooler
  6. See my post about this same trouble here:
    http://www.tomshardware.com/forum/299821-28-installed-core-high-temps-load

    Fixed it by getting an aftermarket cooler. I think the stock cooler just wasn't seating properly. The CPU shouldn't be damaged by hitting those temperatures. My understanding is that the PC will shut off when the temps are too high. I ran mine into the 90s with the stock cooler before shutting it off, and it seems to be working fine.

    I even called intel and the support rep told me to run the intel diagnostic tool. Temps hit 87C during that test and the intel rep said 'yeah, that's no big deal'.

    If you are going to reseat the stock cooler or install a new cooler, you will need to remove the stock thermal paste (with alcohol or arcti-clean). Just get some AS5 or MX-2 or whatever - and read this link before you apply the paste! It helped me a lot:

    http://benchmarkreviews.com/index.php?option=com_content&task=view&id=170&Itemid=1&limit=1&limitstart=4
  7. Quote:
    See my post about this same trouble here:
    http://www.tomshardware.com/forum/299821-28-installed-core-high-temps-load

    Fixed it by getting an aftermarket cooler. I think the stock cooler just wasn't seating properly. The CPU shouldn't be damaged by hitting those temperatures. My understanding is that the PC will shut off when the temps are too high. I ran mine into the 90s with the stock cooler before shutting it off, and it seems to be working fine.

    I even called intel and the support rep told me to run the intel diagnostic tool. Temps hit 87C during that test and the intel rep said 'yeah, that's no big deal'.

    If you are going to reseat the stock cooler or install a new cooler, you will need to remove the stock thermal paste (with alcohol or arcti-clean). Just get some AS5 or MX-2 or whatever - and read this link before you apply the paste! It helped me a lot:

    http://benchmarkreviews.com/index.php?option=com_content&task=view&id=170&Itemid=1&limit=1&limitstart=4

    I guess I'm going to grab a CM Hyper 212+ and some AS5. Is it an easy install or will I need to take my motherboard out of the case?

    Edit: My HAF-912 has a motherboard cut out in the back.
  8. ge8ff said:
    I guess I'm going to grab a CM Hyper 212+ and some AS5. Is it an easy install or will I need to take my motherboard out of the case?


    This guy made a walkthrough for the 212+ installation:
    http://www.tomshardware.com/forum/258023-29-installing-cooler-master-hyper

    It's really simple, especially if your case allows access to the back of the mobo without removing the whole thing. Make sure to check out that link that I put in the above post...it shows you the best way to apply the AS5 on the heatsink's base.

    Edit: I picked my 212 up yesterday from CompUSA for 29.99...if you happen to have one nearby (it's actually a few dollars cheaper than newegg).
  9. Quote:
    What gpu do you have btw?

    EVGA Geforce Gtx 560
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604&cm_re=evga_gtx560-_-14-130-604-_-Product

    I have a HAF 912 case with only 2 120mm (1 intake front, 1 exhaust back). I'm going to be adding another exhaust fan on top, once I find nuts that fit the screws I have for fans. (Since the screws that came with the extra fan don't fit at all :heink: ).

    Fan I bought: http://www.newegg.com/Product/Product.aspx?Item=N82E16835185065&cm_re=scythe_120mm-_-35-185-065-_-Product

    Edit: I might return the fan and get a 200mm fan for the intake. I'd move the current 120mm to the top instead.
  10. Quote:
    Hardware shop or if you have a old psu lying somewhere you can try its fans screws.

    but your temps will get better with a aftermarket cooler. if you get artic just be carefully you don't drop any on the mobo or socket. But I suggest you get Mx 4 rather.

    what psu do you have?

    CORSAIR Enthusiast Series CMPSU-650TX
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005&cm_re=corsair_650w-_-17-139-005-_-Product

    CPU: i5 760
    GPU: EVGA Gtx 560
    Motherboard: Asrock P55 Pro/USB3
    Ram: 8GB (2x4GB) G.SKILL Ripjaws Series DDR3-1333
    HDD1: Samsung Spinpoint F3 500gb 7200rpm SATA
    HDD2: Samsung Spinpoint F3 1tb 7200rpm SATA
    ODD: ASUS Black 24X DVD+R 8X DVD+RW
    OS: Windows 7 Home Premium 64-bit OEM
    Wireless: ASUS PCE-N13 (Thinking about RMA'ing considering it gets worse connection than my iPod touch from the exact same distance.)
    Case: Cooler Master HAF 912
  11. Quote:
    If you didn't get the aftermarket cooler yet you can get the zalman performa and add the extra 120mm fan to it. It can take two. Now here's the coolers tested
    http://www.tweaktown.com/reviews/3371/cooler_master_v6_gt_cpu_cooler/index6.html

    The zalman performa was about 7 degrees cooler than the hyper and it cost bout 7 usd more. if you add this fan with it you good a very good performance out of it
    http://www.newegg.com/Product/Product.aspx?Item=N82E16835186033

    Here is some case fans you can look at.

    CM Long-Life Sleeve .6k-2k RPM 21-77CFM 13-32dBA PWM

    CM Barometric Ball .6k-2k RPM 26-86CFM 13-30dBA PWM .

    AC Fluid Dynamic .3k-1.35k RPM Max 57 CFMw/ 4 Pin PWM

    Scythe SFF21E Sony Fluid Dynamic 1.2k RPM49CFM 20dBA

    Scythe SFF21F Sony Fluid Dynamic 1.6k RPM64CFM 28dBA

    Silverstone 2Ball .8k-2.4k RPM Max 110CFM 17-40dBA fan contr.

    Noctua SSO .9k-1.1k-1.3k RPM 33-54CFM 13-20dBA adj. speed
    I don't already have the CPU cooler but I do already have a Scythe 120mm fan but at 800 RPM.

    I'm also debating on RMAing the board and CPU for a i5 2400 and a P67 Motherboard. Thoughts?
  12. ge8ff said:
    I'm also debating on RMAing the board and CPU for a i5 2400 and a P67 Motherboard. Thoughts?


    Nah, you've already got this thing up and running. You just need to slap an aftermarket cooler on there and you'll be happier.
  13. Don't need to RMA; overclock that bad boy with that 212 and it'll be more than sufficient for years to come.

    My 760 is at 3.91ghz (186 x 21) with 1.36 vcore 1.285 vtt 1.6 vram.
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