Started to sag fps after 15-20 minutes of the game, what could be the problem?

Question

Iron

Hello. Recently there was a problem, after installing Mortal Kombat X, FPS began to sag in games. You play for 15-20 minutes, everything is fine, and then it starts to sag, performance drops by 3-4 times. I don’t know if this is related to Mortal Kombat or a coincidence, but I don’t know what to do anymore. I checked for viruses, cleaned the registry, reinstalled drivers in normal and safe mode. For hardware - I dismantled the whole computer, cleaned every single speck of dust, changed the thermal paste on the video card and processor, in general, I don’t know what to do anymore.
After replacing the thermal paste, the temperature dropped, and only - there was no overheating, I checked everything.
GeForce GTX 760 video card, core i7 processor. Windows, if important, 7 x64
They also advised me to check the bp - everything is fine, and there is enough power, although I have no idea how bp and fps are connected, but okay.
In general, what else would you suggest? In addition to reinstalling the OS, as this is the most extreme case. Help!

Answer 1

And how did you check the power supply, with a piercing look at the “900 watts” sticker? Degraded nutrition causes a variety of problems, incl. fps drop, graphical artifacts, freezes.
Also, you need to check the throttling of the processor and video card, it may not even overheat, but simply live its own life. Sometimes on laptops.
In Windows, you can beat the antivirus and FS indexing for the duration of the game, for example, you never know. In Windows 8, I observed a terrible lag of all programs during disk indexing.
In general, this is all fortune-telling on coffee grounds, of course - you need to take a resource monitor, start the game, wait for lags and see what the system rests on. The options are the sea.

Answer 2

Have you installed any pirates lately?
If yes, then you need to download ProcessExplorer and see what loads the system, very similar to a miner.

Answer 3

Alternatively, you can run the resource monitor in the background and when it starts to sag to see what has changed, probably someone is loading the system, as Inv3go already wrote, it looks like a stupid miner that starts at the wrong time.

Answer 4

If after 2-3 hours of playing the fps drops, then something has changed in the system.
- the temperature has risen too much
- the power supply is a bit weak
- the RAM is clogged and the paging file has started to be used
- some programs, utilities start "PC maintenance", which takes up processor and HDD resources
The processor temperature under load can grow very slowly for 2-3 hours just can allow you to add 10 degrees to what you think looks like a "stable temperature", so check what the temperature is at 100% processor load and feel free to add 10 degrees to it, that's how much it can be added after 2-3 hours of processor operation.
Of course, not in all cases, but if the temperature is below 65 degrees with this error, then it's not the processor.
When the RAM is clogged, the swap file starts to be used, in general it can already be used - here you already need to read about it and how best to set it up, there are many different opinions, but the main fact is that the read and write speed of the HDD is several times slower than that of RAM, hence the drop in performance when switching to the swap file.
If the power supply is weak, at maximum load it can heat up more than at minimum. In general, any unit at full load will heat up more, everything is in% of the load, and not in the number of watts, therefore it is better to always leave a margin of 10-20% of the unit's power so that its temperature does not rise much.
High-quality blocks withstand both the maximum load and even a long peak if you are lucky with the model, and not high-quality ones can turn off the PC, set fire to it, or in theory lead to unstable operation or, for example, lack of energy, although I can’t say here that this can 100% affect FPS, rather, it should shut down the PC or cause it to freeze.
Personally, after a couple of hours of playing FarCray 4, FPS also drops.
RAM 8gb, HDD 2pcs SATA2, block 550W, video card R9 270 OC, processor Core i3-3220.
No thermal paste at all!
so I'm still leaning towards the fact that the processor is overheating.
I think you have the same.
Or something with the paging file or maybe there is not enough space on the HDD?