How can you explain the FPS drop and peaks in frame rendering time?

Question

Iron

Guys, I'm racking my brain for the second week, I need help, otherwise I don't know where to look.
There is the following assembly:
CPU: i5-3470 @ 3600 MHz with CoolerMaster X Dream P115 cooler (fresh MX-4 applied two weeks ago);
Mobo: MSI ZH77A-G41;
RAM: 12 Gb RAM DDR3 (2x4 Gb + 2x2 Gb) @ 1600 MHz (timings in auto mode);
GPU: MSI Armor 1060 6 Gb (now in stock)
SSD: Samsung 860 Evo 500 Gb;
Case: DeepCool Tesseract (3x120 for blowing in + 3x120 for blowing out);
Monitor: 2560x1080.
Until recently, everything was ok and no problems were noticed. I bought FPS Monitor to determine in games what to upgrade next - CPU or GPU. I noticed the processor warming up to 70 degrees in games and 50-55 in stock. Previously (two years ago), the same processor worked at 30 in stock and up to 60 in load.
In some games (GTA V on SSD; Apex Legends transfers to both HDD and SSD), inadequate drawdowns began to appear every few minutes - FPS sags sharply to 1-5, peak values ​​​​appear on the frame rendering time graph with a large delay. In other games - Rage 2, Hellblade, The Division, WWZ - there are no such problems.
At the same time, the AIDA64 stress test shows temperatures up to 70, throttling at 0%. Prime95 did not show any errors in 22 minutes, successfully passed 9 tests.
Where to look? Will buying a new tower cooler solve the problem? Or is it that the thermal snot has dried up under the cover of the processor and nothing will save it? How to be? In the future, the transition to Ryzen 3000, but before it you need to live for two months on this trough so that it does not burn out.

Answer 1

Well, if you didn’t have errors and throttling on two tests - apparently this is not overheating, but a software error, I had such a problem once solved by removing the paging file. Try it.