9900K Idle Temps

F

fullvietFX

[H]ard|Gawd
Joined
Sep 1, 2004
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Hey there guys so usually my 9900K idles around 29C to 32C. However recently I installed Ai Suite 3 and the software shuts off my fans at idle which I really like. My only issue is that my CPU now idles around 46C now. Long-term wise do you think there will be any degradation on the processor? Probably not a big issue at all but I was just wondering.
 
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Sounds like you need to set up the fans in suite 3 with fan profiles.

That's a hot CPU and letting it get that hot before something like gaming kicks in would only make sure shes running too hot more then it needs to be.

Have your fans set to low rpms but still moving air when idling. Usually just noticable would be good.
 
You want quiet you need to invest a ton of money into a custom water loop and large rads so you can have many quiet fans cooling that CPU and graphics card.
 
I just upped the RPM's by 350 and I can't even hear it and the temperatures dropped 15C. Thanks for the input fellas!
 
eclypse said:
You want quiet you need to invest a ton of money into a custom water loop and large rads so you can have many quiet fans cooling that CPU and graphics card.
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The higher end AIOs do a decent job for low cost, maint, and noise. The 280mm or 360mm is definitely recommended minimum though for any OC on the 9900k.

That being said theres nothing that will affect the chip with running 0 fam at low temps, however it may decrease the life of the fans if they have to turn on/off several hundred times a day.
 
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Andross182 said:
my 9900k at stock clocks idles around 39-41c under an h115i platinum cooler.
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That's bad, especially if you're using that Air 540 case in your sig. What is the ambient temp of the room? How hot does it get with a gaming load? Mine idles at 30C with the Kraken X72 (360mm) with a 24C ambient for a 6C delta. It idled at 32C with the X62 (280mm). This is with MCE enabled.
 
Keep the fans on, but keep them slow at stock.

If enabled in the bios Thermal Voltage Boost will allow the chip to momentarily (until temperatures rise above 50C) clock up 200Mhz above the maximum turbo speed. But for this to happen the temperature of the chip needs to be below 50C. The lower the initial temperature, the more time it can sit at the higher speed.

It is for brief transient loads.
 
Keljian said:
Keep the fans on, but keep them slow at stock.

If enabled in the bios Thermal Voltage Boost will allow the chip to momentarily (until temperatures rise above 50C) clock up 200Mhz above the maximum turbo speed. But for this to happen the temperature of the chip needs to be below 50C. The lower the initial temperature, the more time it can sit at the higher speed.

It is for brief transient loads.
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That isn't thermal velocity boost.
What you described is for laptops. TVB functions differently on laptops than desktops.
TVB on desktops just lower the VID based on temperature.

https://rog.asus.com/forum/showthread.php?106375-MCE-explanations-and-others&highlight=explanations
 
Keljian said:
Falkentyne:

from intel's datasheet: https://www.intel.com/content/dam/w...th-gen-core-family-datasheet-vol-1.pdf#page64

from wikichips: https://en.wikichip.org/wiki/intel/thermal_velocity_boost

Am I missing something?
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No, it's just Intel being Intel.
TVB on desktops isn't documented (it's controlled by a MSR) because it's literally unimportant. All it does is *decrease* CPU VID by 1.5mv every 1C drop starting at 100C (Intel chips are designed to operate up to 100C when running at their official turbo boost frequencies, and with auto voltages and stock AC/DC loadlines. Your question was naturally asked by someone else before and I forgot who replied, saying that the datasheet only talks about the laptop ratio clipping.
Notice that the intel PDF says "only avalable on 8th generation intel i9 (8th, not 9th) and mobile xeons?
It's directly referring to laptops here.

TVB on laptops actually increases turbo bins if the chip is under 50C (again, total garbage...how is a laptop going to stay under 50C at load?).
Those pages and the datasheet you mentioned only deals with TVB on *laptops*. Not desktops.

The laptop TVB is not controlled by a MSR. It's controlled by the bios
"TVB Ratio Clipping enabled/disabled" (you can see this in a raw AMI bios dump with AMIBCP 5.02.0031.

(not sure what TVB Voltage Optimizations does, but it's in the same location in a bios; it may or may not be the same as the desktop "MSR" version.
Read Shamino's post and see how it works on desktops.

(I had no luck with this MSR, it was all 0's and any attempt to change it made it stay all 0's).

TVB

Now for the current emphasis on totally stock perf of the i9’s by the review sites, all the attention is on TDP but that’s just a gnat compared to the camel swallowed. NO site actually talked about and examined the latest feature of the i9, Thermal Velocity Boost TVB. By default Intel enables this but I see that only Asus boards enable this at defaults. The other boards I tested have this disabled even at defaults.

What this does is it reduces voltage guardbands depending on core temp. Traditionally, the voltage request by the proc is always based on worst case scenario TJMAX, meaning the voltage the proc thinks it needs for the frequency when temp is 100c. It is well-known that the cooler the chip runs, the lesser the voltage needed. Therefore TVB is opportunistically reducing power and temps. The behavior is quite linear and I observed the following on several samples.

TVB takes effect from 40~50x on 99k and 40 to 49x on 97k and 40 to 47x on 96k, simply 40x to single core boost ratio. The V/temp curve runs from 0c to 100c. For example 150mv delta between 100c and 0c for 50x, meaning every 1C drop from 100c VID requested will reduce by 1.5mv. The reduction is smaller as you go down to 49x, the smaller the ratio the smaller the reduction, and below 40x you get no reduction. This is good for most people running stock. You can try this yourself by noting the VID idle, and then unplug your water pump and let the core temp rise slowly, noting down the correlated temp/VID, and see what i'm talking about.
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My fan and pump curves ramp up when I'm gaming.
I can't hear them bc I'm wearing a set of cans and concentrating on breaking my kill record.
Fwiw airflow is becoming an issue as Spring hits the mid-80's.

280mm Aio on 7820x front case intake with 120mm aio on 1080ti exhaust will need some help this summer.
 
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