Safe i5 4690K Temperatures: 77-79°C in GTA 5 on Z97-G43 Board with Box Cooling & Be Quiet Paste

Hi!
I've had the i5 4690K on the Z97-G43 board for a few days now. I have a processor on stock clocks with box cooling, I'm going to buy a Fortis 3 soon. But until then I have to use a BOX and here's the problem.

In games I have quite high temperatures, in GTA 5, for example, on the highest settings, the temperatures fluctuate around 77 ° C, the maximum reached 79 ° C, but I think that after a longer game it could reach over 80 ° C. The paste under my cooling is Be Quiet silicone, I'm sure the cooling is fine.

Are such temperatures safe and nothing will happen to the processor for this week or two? Somewhere on the internet I heard not to exceed 80 ° C for a long time because the processor can crash. And for my 79 ° it's critically close. Others say not to allow 90 ° C etc. Under OCCT it goes up to 85 ° and probably higher, but in games it's not that much.

With the housing open, the temperatures are slightly lower, I assume that the perpetrator is a 3pin fan connected to 4pin on the board, which works only on 950RPM, although it could reach 1250RPM (in bios I set it like that, but only there it retains the settings and under windows still 950RPM) It does not keep to pull hot air and even the GTX970 reaches 80 ° so probably one heats the other. The housing is SPC RG1
on the front I have one fan under MOLEX, which works at 100% all the time.

The safe temperature is specified in the product specification on the manufacturer's website: https://ark.intel.com/en/products/80811/Intel-Core-i5-4690K-Processor-6M-Cache-up-to-3_90-GHz - it is she is 72 degrees (on IHS). The core temperature is several degrees higher than the IHS temperature.

For me, the safe temperature of this model would be something below 75 degrees on the cores. If you hit 85 degrees in OCCT, that would be bad for me.

The equipment should not be operated with an open housing, then you do not provide proper cooling to the rest of the set. The card temperature is still normal, although I would also try to lower it:

http://pclab.pl/art68055-60.html

So until I buy Fortis, all I have to do is browse the internet?

To slaughter it, you won't slaughter that equipment right away. It's a bit strange that it reaches such temperatures, even on the box it should be slightly cooler without OC. What paste did you use and when did you replace / apply it?

As for the temperatures, you can always do underclocking - reduce the frequency and possibly lower the CPU voltage a little. The temperatures will certainly drop - however, there should not be such an oven on a properly installed cooling box.

I used the cheapest be quiet toothpaste. On the old board, which had a 3-pin connector for the housing fan, this worked at 100% and the temperatures were cool. And now he is not going to rush it and keep pace. As I wrote, without the housing, the temperatures are max. 70 degrees, so everything indicates poor air circulation in the kennel.

I don't know if it's better to buy a fortis 3 or a PWM fan on the back and reassemble this 3 pin on the front.

I would buy cooling for the processor anyway. It is not appropriate to fasten the BOX cooling on the K-series processor

Unfortunately, Be Quiet does not have the "cheapest" model in the specification. I found DC-1 so if it's this paste and it doesn't have too much charge, that's OK.