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Bios temperatures versus HW Monitor, Speedfan

post #1 of 4
Thread Starter 
I am running an Intel 4670k on an MSI Z87- GD65 (Bios updated) using a Noctua NH-U14S with dual fans and see temps around 30C-31C for the CPU and under 30C for the system in the Bios while both programs show temps at 22C-23C (ambient is 20C-21C). Overclocking to 4.2 Mhz with just the CPU Multiplier shows idle temps in the Bios of 40C while both programs show an idle temp of about 28C and a load temp of around 60C using Prime 95 but OCCT shoots the temp to well over 80C in a matter of minutes before I shut it down (temps were up because even my fans seemed to be over revving). A 4.2 Mhz overclock is running stable for me and is all I was after in the first place and the highest temp I have seen is around 50C at about 85% CPU usage so what temperatures should I beleve and what is the max temp for a 4670k? Having always used AMD before now even 60C seems too high to me. Thanks
post #2 of 4
You mean 4.2 GHz, not 4.2 mhz right? And the BIOS may run the cpu at 4.2 GHz idling with no load, thats why you may see a higher idle temperature than in the operating system itself.

Fans over revving, you mean fans running at high speed. I doubt the fan would over rev, unless you got it somehow hard wired to a more than 12+V power source.

Max temp you should not go past is the tjMax which is 105°C. Keep under 85°C for 24/7 Use. 60°C is no where near high for your CPU. 73°C and higher is a little bit on the high temperatures of intel.

I would use Prime95 for stress testing as well, maybe Aida64. I don't always trust the BIOS temperature and I would usually use RealTemp to monitor the CPU core temperatures.

I do strongly recommend not to leave your CPU Voltage on AUTO when overclocking, it'll use more voltage than you need then you get higher temperatures than usual. 4.2 GHz might need around 1.20-1.25v maybe even lower. Keep under 1.4V at all times.

You should read the Haswell Overclocking guide on the forums, heres a link:

Haswell Overclocking Guide
Edited by benjamen50 - 3/25/14 at 2:36am
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post #3 of 4
Thread Starter 
Sorry, yes I do mean 4.2 Ghz and what I mean by the fans over revving is just that I usually don't even hear the Noctua fans running and with OCCT they were very apparent but not with Prime95, over revving is the wrong phrase. Just surprised me how much more OCCT ramped things up. And thankyou for the recommendation for CPU voltage and the link.
post #4 of 4
OCCT sends to put alot of stress on the CPU Compared to Prime 95. Intel Burn Test is probably just as intense as OCCT, if not more.
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Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
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