Need help underclocking my CPU - Australian summer causing overheating

[NumeroSieben]

I've been having a bit of trouble with my computer. it has a 4790k and a nepton 240L cooler. up until recently its been completely fine, but i've started crashing a lot. we are starting to have 30 to 40 degree celcius days and my room in particular is an absolute hot box. we are too poor for air conditioning and very often my room is hotter than it is outside. 

 

Under a prime95 stress test while i was looking for the problem i saw my CPU hitting 100 degrees celcius. It's also 50 degrees at idle. far far higher temperatures than i'm comfortable with and i'm suspecting - the cause of the crashes. I cancelled the prime95 test very quickly upon seeing temps hit that high, i didn't want to subject it to them for long. 

 

Could i have a step by step guide to underclocking my CPU to reduce temperatures? i really want to be capping out at 80 degrees, not 100. I'm familiar with overclocking, although i haven't touched it in a while. My cpu currently is not overclocked at all 

[BobyTheDragon]

Underclocking a CPU is the same way as Overclocking.

 

All you have to do is put the numbers down in the BIOS. But I don't know how to get there so... Google Anyone?

[Epiclol86]

I'm not an expert overclocker, but i can suggest some videos, like this one:

or this one :

 

just follow the instructions but lower the numbers instead of augmenting!

[Ling]

You might wanna invest the upcoming Christmas money you will undoubtedly receive into a new, more efficient CPU cooler (such as a Corsair H105).

[airdeano]

one thing to note is to not use a stress mark app on a adaptive voltage mode

system. produces unneeded voltage and will raise the temperatures dramatically.

p95 is one of those that you do not use, unless your system is on static voltage mode.

 

what is the ambient/room temperature? outside is 30-40°, but what about inside?

 

you can test the reduction by using the power options menus.

start>control panel>power options

balanced mode>change plan settings>change advanced power settings>scroll to Processor Power Management>change maximum processor state to 75%

and retest with normal applications/gaming verify temperatures and performance.

otherwise finding your undervolt needs to maximum multiplier 44 or dial down the

turbo to a something that can achieve 40 multi and a lower voltage.

[JJJaaammmeeesss]

I feel your pain. Get an AIO cooler. I've got the thermaltake Extreme 3.0 S and on 30+ degree Celsius days im sitting at just over room temperature at idle (with no A/C in the room) and sitting at <70 during CPU intensive tasks such as video rendering. 

[airdeano]

I feel your pain. Get an AIO cooler. I've got the thermaltake Extreme 3.0 S and on 30+ degree Celsius days im sitting at just over room temperature at idle (with no A/C in the room) and sitting at <70 during CPU intensive tasks such as video rendering. 

 

they already have a cooler master 240L..

[JJJaaammmeeesss]

they already have a cooler master 240L..

Yeah I know but I'm saying it cos if his temps are so high it may be a cooler problem

[NightMiu]

-snip-

Well, its pretty easy, you start with decreasing the voltage to your cpu until it gets unstable, then reduce clock speed and repeat until you get a temprature you are comfortably with.

[NumeroSieben]

one thing to note is to not use a stress mark app on a adaptive voltage mode

system. produces unneeded voltage and will raise the temperatures dramatically.

p95 is one of those that you do not use, unless your system is on static voltage mode.

 

what is the ambient/room temperature? outside is 30-40°, but what about inside?

 

you can test the reduction by using the power options menus.

start>control panel>power options

balanced mode>change plan settings>change advanced power settings>scroll to Processor Power Management>change maximum processor state to 75%

and retest with normal applications/gaming verify temperatures and performance.

otherwise finding your undervolt needs to maximum multiplier 44 or dial down the

turbo to a something that can achieve 40 multi and a lower voltage.

 

Ambient room temperature is typically a few degrees higher than whatever outside is. Aircon is too expensive to run so i make do with fans and ice water. the computer is like having a heater in a room with absolutely terrible ventilation and i can physically feel the temperature change between my room and the rest of the house

 

 

thanks for the advice everyone, i'll be putting it into effect tomorrow when the day is at its hottest so i can see what the temperatures look like and see if i get them into a good place. the day has already cooled down a bit here (its evening) but i've gotten the temperatures down a bit with the power management one. i appreciate all the fast responses!

[KamiKatze]

Lower the voltage in fixed mode and stress test until you reach a voltage where it gets unstable. Adjust the cpu multiplyer until its stable again and you can underclock further. Do this until you reached a comfortable target temperature. Then switch the voltage du adaptive mode but leave the maximum voltage target.

[SaladFingers]

Unfortunately in your situation the best bet would be air conditioning. Have you tried re-seating the CPU cooler after adding fresh thermal paste? Could help if the paste has been drying out.. You should at least try to keep the room temperature the same as the outdoor temperature. Open windows strategically to create airflow. On my house for example, I know a specific combination with two windows that will create a nice flow of air through the house. Your mileage may vary....

 

As far as underclocking goes, just get into your BIOS and lower the multiplier setting. After doing so, try and give it a little less voltage. Voltage is the king when talking about temps, not clocks. Even if you don't underclock, if you can manage to have it stable at a lower voltage you will immediately notice a difference in temps.

 

I feel you man, I also live in a pretty hot country and the Summer is always scary for my computer parts. The only real remedy I found is air conditioning