... i9-9900kf ... temperature readings ... instantly ... 90-100 ... closing the game INSTANTLY drops it back down to 50-mid 40's ... same stock cpu cooler ive always had ... my last processor didnt have this issue ... is the processor really getting that hot? inspecting it at all doesnt seem to be nearly that hot
Cryptixg,
We need to clarify several points for you.
(
1) Here's the nominal operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are ideal.
(
2)
Core temperatures respond instantly to changes in load.
Intel’s specification for Digital Thermal Sensor (DTS) response time is 256 milliseconds, or about 1/4th of a second. It’s completely
normal and expected for Core temperatures to “INSTANTLY” increase and decrease.
(
3) As
Nemesia and
boju have already pointed out, the 95 Watt Thermal Design Power (TDP) i9-9900 "K" variants are easily capable of exceeding upwards of 200 Watts, so
high-end air or liquid cooling is absolutely crucial. You can not use a 65 Watt TDP stock cooler designed for a 65 Watt TDP i5-7500 and expect that it will maintain reasonable Core temperatures on your i9-9900KF at any more than a very light workload.
(
4) Yes, without high-end cooling, the i9-9900 "K" really does get "that hot". This processor requires the very best air coolers, or a minimum 280 AIO, or preferably a 360 AIO, or a good custom loop.
(
5) Trying to check thermal performance by touch is like feeling a fireplace from 3
meters (10 feet). Since hundreds of millions of microscopic
nanometer scale transistors are densely packaged into a tiny Die, heat dissipates over relatively large areas and thermal gradients to the cooler, which is a considerable distance from the Cores at about 3
millimeters (0.1 inch); 3 millimeters = 3,000,000 nanometers.
Although some heat dissipates to the substrate, socket and motherboard, most heat dissipates to the cooler through several thermal gradients; Cores > Die > internal TIM > IHS > external TIM > cooler. Consequently, even at 100% workload
nothing will feel hot; exhaust airflow, heat pipes, cooling fins, radiator or water block will only feel
warm, and liquid cooling tubes will have just a moderate temperature differential.
If you look at the top of each of our Forums, we have "Stickies" which are helpful and informative resources that are permanently "Stuck" in place so they're always available for everyone's benefit. If you look at the top of our CPUs Forum, there's a Sticky that will bring you up to speed on this topic;
Intel Temperature Guide. You might want to give it a read.
CT
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