BaumiBaumann

How about an open challenge to the office to build a Stealth PC. (things that should not be pc's)
 
Set a decent budget.
 
Cameras can follow each person involved like a reality show to record progress and failures/ challenges they have to overcome with their design.
 
And no retro game system chassis.
 
Lets see how creative your team can be!
 
We, the viewers can vote on the winner.
 
For motivation from just some random guy my HTPC.....
Pics show her with; 15-7500T, Noctura low profile cooler, Gigabyte H170TN, 16GB ram, 960 Evo 250GB M.2.
She has been upgraded with i7-8600, 16GB Vengence 3200Mhz RGB, Z390 Phantom ITX.
Front mount USB's 3.0, cockpit has PWR/ HDD etc LEDs and PW/ Reset switches.

Its the click all the expensive shit in PCPP thread

1. Record at a higher bitrate if you're recording your videos at a lower bitrate. YouTube wants a good source to work with.
2. Keep in mind that YouTube compresses video in an incredibly mediocre bitrate in AVC, VP9 and AV1.
3. Videos need a couple of reference frames to be able to clean up and produce its image properly. This really isn't something you can fix unless your video does not have a lot of reference frames.

The thing is I bought the Radiator with the intention to put it at the top but sadly to big, so I improvised and found a way to put it at the Front
 
Now the Radiator is Exhausting while getting air from the from the bottom fan
 
My Rear aswell as the top left fan is blowing air to the motherboard - which I thought were enaugh but but looks like it isnt
And my top right fan is again exhausting
 
 
 
To your other points im currently testing to underclock the cpu combined with my case fans now running at 100% (They were on Silent mode before) to hope that thats enaugh which at the moment looks very high promising
 
To be honest im pretty happy with my water cooling its really silent never had any failures what so ever and 70-80*C is more than enaugh
 
All in all I will probably build a completly new Pc in a view months or so just to not  have to mess around with this and again have a high clocked cpu
 
Again Thanks to all your help!

What orientation is your rear fan? Exhaust? What orientation is your radiator? Intake?
 
A couple of things I personally don't like about AIO's:
 
1) Generally speaking, you're making a compromise one way or another. Usually, you're using up the spot that your case would allot for intake fans. In your case, with only a single 140mm radiator, it's either set up as intake on the radiator, that by the by time air passes through the radiator, the temperature is increased vs. if they were just intake fans, OR its set up as exhaust, where the radiator is cooling the CPU with hot air and also the hot air exhaust is reduced. You can do push-pull to help increase flow, but the restriction is still there.
 
2) Generally speaking, vs. air coolers, you don't get any incidental motherboard cooling that air coolers give. This is more apparent on top-down coolers, but even air tower coolers there is some benefit.
 
3) All the other things that can go wrong with AIOs, like pump failures and rarely leaks.
 
If you had a regular cheap cooler, say a Cooler Master Hyper 212 (and subsequently standard intake fans instead of a radiator in front, i'd wager your CPU cooling performance would be just as good, and your internal case temperature would be better, your system would be quieter, and your VRMs would be a little less toasty.
 
As for why this is happening now? Maybe after years of high temperatures (but not to the point of throttling or failure) the motherboard components are on the way out. That H-series board isn't really designed for a very high power chip, and if you look at the power delivery it is not too robust.
 
If you are concerned with money, i'd just leave the case open + fan blowing on it until you can afford to just upgrade to Ryzen 3000 in a couple months.

Ah, I hadn't thought about this yet, but I now understand it even more! The VRM is probably what is so toasty. This is partly because you have a quite power hungry CPU, but also partly because it cannot benefit from air passing by from air coolers, as you are "expected" to have an air cooler with the motherboard you have. You could try experimenting with a fan directed at near the CPU socket and above (google for where the VRM is located on your motherboard) so it has more air to cool itself. Possibly tape (preferably with some rubber stuff or so in between to reduce vibrations) or so a fan ontop of your GPU, pointed towards the VRM and CPU socket.

Might want to consider some VRM add on heatsinks and jury-rig a 140mm fan on the inside of your case + drill out some holes

So with this little Fan Setup and also GPU Fans pinned at 100% my Motherboard Temperatures are now at around 100-105*C which after 15 minutes of Stress Testing seems to Prevent the System from Thermal Throttling so thanks to everyone who helped me out with this!
 
But i still have no clue why seemingly has started out of nowhere
Do you guys think that maybe my mainboard or the sensors on the mainboard are broken and replacing it will help?

So with this little Fan Setup and also GPU Fans pinned at 100% my Motherboard Temperatures are now at around 100-105*C which after 15 minutes of Stress Testing seems to Prevent the System from Thermal Throttling so thanks to everyone who helped me out with this!
 
But i still have no clue why seemingly has started out of nowhere
Do you guys think that maybe my mainboard or the sensors on the mainboard are broken and replacing it will help?

So, this is what I see - 
 
In that second image, you aren't CPU thermal throttling, right? You aren't getting higher than 68c, and it says "Thermal Throttling: No", and your average frequency seems pretty even.
 
But I do see some of your motherboard temperatures in the 90s, which if those are VRM readings, is quite high, but IIRC they are rated at 115 or 125 max (depending on the components, i guess, some more some less), so it could be your motherboard VRM throttling your CPU speed because of its temperatures (that saw in your first original post) if it hits close to those temps.
 
If you don't have any type of positive airflow over the VRM, try adding some cooling onto the VRM and see if that improves things. Like open up your case and blow a regular house fan or something directly onto the VRM.
 
See if it still has the same behavior.

I think that it is being limited somewhere, as it's only turboing to 4.2 GHz instead of 4.4 GHz. I do agree with you that the motherboard temperatures could be causing this. Looking at pictures of your motherboard, it definitely has an almost complete lack of cooling for motherboard components. It's probably not designed to cope with the power draw of the i7 4790k, and therefore doesn't have enough cooling for it. Like Plutosaurus suggested, I'd recommend you to direct some extra airflow over the motherboard, and see if those high temperatures decrease any.