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Unreasonable temps with i7 920 overclock

Hi everybody. I've got an old i7 920 that I have overclocked to a very stable 3.8GHz, with a Corsair H115i watercooler. I've been running it this way for months with 0 issues. However, I recently noticed my core temps are reaching 82-84C while playing Battlefield 1 (which keeps my CPU running at 100% for hours at a time).

When I was tweaking this overclock I was always just looking at "CPU temp" as read by the motherboard, and none of the countless guides I consulted ever suggested otherwise. However, I now understand that core temp is what one should be concerned with. Now I'm running a 45% overclock which is very significant, but at just a bit over 1.3volts I cannot even begin to understand how my core temps are hitting 84c. This cooler does a fantastic job of keeping my "CPU temp" at 70C or below, but these core temps apparently just fly off the handle. I know this processor is notorious for running hot but I see people claiming they easily get their 920's to 4GHz without anywhere near this much heat. What's going on here? Any advice?

Specs:
Motherboard: ASUS P6T
CPU: i7 920 @ 3.8ghz, with Corsair H115i watercooler
RAM: 12GB DDR3
GPU: Nvidia GTX 1060 6GB
Reply to BadAtVidyagames
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  1. Best answer
    Hi,

    I'd use Realtemp/coretemp. How were you reading the temp before? In the bios?

    Voltage does increase heat and 1.3v is commonly used but could be a bit lower. Just all depends on memory speeds and cpu lottery itself.

    Memory on these platforms is one of the main stability issue, backing the frequency off might show you better result at a lower cpu voltage.

    Hyperthreading if in use can add lot of heat also

    In my sig i've had an 920 at 4Gz running still to this day if you'd like to try the settings i used.
    Reply to boju
  2. boju said:
    Hi,

    I'd use Realtemp/coretemp. How were you reading the temp before? In the bios?

    Voltage does increase heat and 1.3v is commonly used but could be a bit lower. Just all depends on memory speeds and cpu lottery itself.

    Memory on these platforms is one of the main stability issue, backing the frequency off might show you better result at a lower cpu voltage.

    Hyperthreading if in use can add lot of heat also

    In my sig i've had an 920 at 4Gz running still to this day if you'd like to try the settings i used.


    Hey boju, thanks for the reply. I spent a couple weeks fine tuning the setup I have now and 1.325 volts is the absolute lowest I could get it to be rock solid stable at 21*181 (I really lost the silicon lottery with this D0 chip). The memory multiplier is at it's second lowest setting, but I suppose I could set it to it's lowest and try to play with the voltage some more. My only concern in that regard is that I have heard that some poorly optimized games like Fallout 4 actually do see a noticeable difference in performance depending on RAM speed.

    My main concern is basically that I wouldn't think I should have to do those things since 1.325v doesn't strike me as an insane number. Core #1 is idling at 46C, which just seems ridiculous to me. I actually just reseated the watercooler with some fresh arctic silver and temperatures are topping out at 79C on Prime95 instead of the 90+ it was reaching before. Hopefully it stays this way, as I am not too concerned with idle temps. Thanks for your help!
    Reply to BadAtVidyagames
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