beasmodeee,
Here's the operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are preferred.
Core temperatures increase and decrease with Ambient temperature.
Standard or "normal" Ambient (room) temperature is 22°C or 72°F. Idle temperatures below 25°C are generally due to Ambient temperatures below 22°C.
Achieving the lowest possible idle temperatures involves several variables. Since ambient temperature has been covered, it's still difficult to compare apples to apples without knowing:
(1)
Is "idle" really idle ... less than 3% CPU Utilization under the Performance Tab in Task Manager?
(2) Are all the power saving features enabled in BIOS such as SpeedStep?
(3) Are Windows Power Options properly configured?
All "C" States in BIOS must be enabled to achieve the lowest possible idle temperatures. Also, if Windows Power Options for "Balanced" or "Power saver" is not set correctly, then SpeedStep will not work ... OR ... if Windows Power Options is set to "High performance", then SpeedStep will not work because Minimum processor state can‘t be set.
To check this, go to Control Panel > Power Options > Change plan setting > Change advanced power settings > Processor power management > Minimum processor state. The default setting is 5%. If it's not, then correct it and click Apply.
Your rig needs to be at
dead idle; no programs running, and off line. No Folding or SETI or "tray-trash" running in the background, and just
1 or 2% CPU Utilization under the "Performance" tab in Windows Task Manager, where unnecessary Tray items, Startups, Processes and Services that contribute to higher idle temperatures can be disabled.
Use Core Temp -
http://www.alcpu.com/CoreTemp - to check that Power is only about 2 Watts:
Under these conditions, your i7 8700K
should certainly idle less than 10°C above Ambient. However, as the Digital Thermal Sensors tend to be more accurate at higher Core temperatures due to calibration issues such as linearity, slope and range, idle temperatures may not be entirely accurate.
My personal rig is a delidded 8700K with an H105 in push-pull, which is front-mounted. The pump idles at 75% with fans at 40% and all power saving features enabled through C7. The processor idles at 1% in Task Manager, which yields an average Core temperature of 3°C above ambient.
Better cooling and lower idle Power yields lower idle temperatures.
Check out our Guide:
Intel Temperature Guide -
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
CT
Core temperatures increase and decrease with Ambient temperature.
Your rig needs to be at dead idle; no programs running, and off line. No Folding or SETI or "tray-trash" running in the background, and just 1 or 2% CPU Utilization under the "Performance" tab in Windows Task Manager, where unnecessary Tray items, Startups, Processes and Services that contribute to higher idle temperatures can be disabled.
Use Core Temp - http://www.alcpu.com/CoreTemp - to check that Power is only about 2 Watts:
Under these conditions, your i7 8700K should certainly idle less than 10°C above Ambient. However, as the Digital Thermal Sensors tend to be more accurate at higher Core temperatures due to calibration issues such as linearity, slope and range, idle temperatures may not be entirely accurate.
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