Windows 10: Sudden severe FPS drop lag spike and input device latency skyrockets

The problem consists on at least 2 games that I frequently play.The problem occurs when my custom-built PC worked for a few hours and then games were played. I have done clean boot and currently no services are enabled other than Avira Operations GmbH's Endpoint Protection Service and Endpoint Protection Secondary Service, of which they are enabled by itself every time I do a clean boot. Startup items are all disabled. Memory diagnostic tool has been run and no problems were found. Graphics driver has been updated to the latest version, and game settings are not extreme.Hardware:CPU - i5-940

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Sudden FPS drop/Stutter

Since 2 days ago, I just turned on my Computer, and it starting having issues while I was playing Witcher 3 (starts with decent fpsm and then very low fps, dropping to 35, then 20, and stopping at 12 or so, in a matter of seconds, in a matter of 1min of starting the game), also stuttering without any high demanding programs, randomly. I was playing at 45-60 fps, without any stutters or sudden fps drop. Have tried other games the issue persists. Even setup everything to low settings.
I have ran several tests with several tools, all seems normal, no sudden memory spikes, or temperature raising out of the ordinary, nothing that would indicate such an fps drop or stuttering.

MSI Afterburner

I also did the reset option on Windows10, completly cleaned out all my personal info from the windows partition.
So at this point, I am not sure if it is a software issue or a hardware issue.
Any suggestions are greatly appreciated.

Edit: I kept doing some tests to find out the issue. And this happened before and I was able to replicate it. Same thing happened as before, till I set it up to fullscreen, Alt+Tab from the game and then back to the game, FPS went up to 50 again, stable and good, dropped after a couple of seconds. After a bit it went to 2-5 fps, and I had to shutdown the game, because even the sound was getting messed up.

MSI Afterburner 2

In this image those ups and downs in the GPU usage are when the fps dropped really hard and the sound got messed up.

 

Wireless input devices lag under CPU load


Hi,

I have experienced issues regarding my Wireless input devices (Logitech Unifying Receiver mouse & keyboard, Bluetooth Wireless Controller) during gaming. Both receivers are plugged into USB 3.0 ports and in almost immediate proximity. When idle, or performing simple tasks like browsing the internet, all the devices have almost no latency. But, when gaming, they have sudden spikes of latency (up to like 50 ms, from the usual 1 ms). This happens for all wireless inputs, but if connected with a USB cable the same devices perform as they should, with no hiccups.

I assume that the processing of the Wireless Receiver signals somehow has a lower priority when under heavy load, which is what would cause such behavior. I might be wrong.

Any suggestions as to how to fix this?

 

Massive FPS Lag And GPU Spikes

I've recently noticed that when running games like Minecraft and League of Legends, the FPS stutters and drops suddenly. This problem only started a few weeks ago - before that it ran fine. I usually average around 90FPS in Minecraft and 70FPS in League, but during the spikes it drops to 5-10FPS. The spikes used to only occur every few seconds and went away after a while, but now they're frequent and make trying to play near impossible.

I opened up Task Manager when running Minecraft, and the GPU constantly spikes from around 30% to up to 90%, causing the drops. Most of the GPU usage is from Java running, and the spikes are from it as well. Running on Windows 10, I already have Optifine installed on Minecraft. The problem only occurs in fullscreen.

Things I've already tried:

• Uninstall and reinstall graphics drivers
  
• Cleaned out junk files
  
• Uninstall and reinstall games
  
• Close background programs, end tasks in Task Manager
  
• Ran multiple antivirus scans using AVG, MalwareBytes and Adaware(no problems found)
  

Specs: