CPU Idle Temps Increased (i7 4790k)

[harvey.l12]

Hi Everyone!

So i have an i7 4790K CPU not overclocked as of yet as i don't need any extra power as the auto 4.0GHz to 4.4GHz is enough. So around a month or two ago i had my idle temperatures around 24c if not less. Maybe 26c-27c on some days. And now my idle temps seem to be around 34c and its just annoying as there's no explanation. I use a H100i by the way...

1. This could be down to the air temperature in the UK right now over the past month it has been quiet thick and humid temperatures which could affect it but how much would this affect it? would it increase my idle temps by 10c?

2. My BIOS settings have been reset a few times when i was installing RAM and stuff. But i have got my CPU V-core back down to a lower setting but it didn't seem to make a big difference if i'm being honest.

3. I've tried running my H100i fans as nearly full RPM and this also didn't affect the temps too much.

4. When the PC is under stress tests its around 72c-80c and when rendering videos which is what i do a lot of its around 65c which isn't bad.

I just want to try and get my idle temps lower into the mid 20c again. I used to have idle at 17-19c but i can't quite remember what i had to do which made it 25c. But back to 24c would be nice

Thanks for any replies

 

[new boy]

if you ambient temps increased by 10c, then your idle temps would increase 10c.

I wouldn't be worrying about 34c idles.

 

[currob]

Radiator free of dust build up between fans and radiator? On my 24/7 system I end up hoovering the rad every month or two. Is the h100i pulling air out of the case or into the case? I always have it pulling air into the case through the rad personally. Check pump speed?

 

[harvey.l12]

So when it starts to get cooler weather the CPU should run cooler...

The radiator is free of dust i think but i will check when i'm home, what should the pump speed be? and how can i increase it?

Thanks

 

[currob]

So when it starts to get cooler weather the CPU should run cooler...

The radiator is free of dust i think but i will check when i'm home, what should the pump speed be? and how can i increase it?

Thanks

Open "Corsair Link" app and check speed displayed under "H100i Pump" - mine runs at ~2200 rpm. Double click the pump speed gauge will open menu to the right where you should hopefully have "Maximum Speed" selected. I'm sure it will be fine but worth checking. As others have said, the ambient temp will prob be the cause if dust free and running ok.

 

[harvey.l12]

okay, i will have keep an eye on the temps then just to be safe. Whats your v-core for your 4790K? when not overcloked?

 

[harvey.l12]

And whats your idle temps?

 

[currob]

1.076v at 4.0GHz
1.198v at 4.4GHz
1.225v at 4.6GHz

 

[harvey.l12]

okay i have 4.0GHz with the auto boost to 4.4GHz?

 

[currob]

Just paused one system and after 5 mins the idle temps are ~ 26c but both systems are stacked together in the corner of a very warm room with a 50" screen and 2 monitors by them and also a big UPS and surround sound amplifier, and both systems are running BOINC software with continuous heavy loads, so that part of the room / house is very warm and I'm very happy with the idle temps Pictures in post #25 here if interested: http://forums.overclockers.co.uk/showthread.php?t=18688216

 

[PullTheTricker]

Completely normal unless you live in an underground base or something. My 4790k always was 23c idle, and now during hot summer days its 33+ idle. If you live in antartica then I would check if adaptive mode is enabled in bios.

 

[Guest2]

39c idle here with noctua nh-u14s in push pull (4790k 1.280v 4.7ghz)
My computer is backed up against a wall and boxed in under my desk so gets pretty toasty and the hot air can't go anywhere