CPU thread pegged while gaming

HDD-Mod

Reputable
Mar 15, 2015
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This is happening for all the games I've been playing recently.

CPU usage is about 3% while not gaming, so it's not an issue of a background issues. When I'm gaming, ONE thread is maxed out, while the rest are doing their own thing, 5-10% for something like black ops 2 multiplayer (yes I still play, tons of fun). Something more demanding like battlefield 1 will yield about 35% on each core, but the SAME thread is pegged at 100%, even in the main menu. Battlefront, black ops 2, battlefront, cs:go, etc. What is going on here?

It's RUINING my gaming experience, and I just noticed this issue about a month ago when I checked task manager, so this may have and more than likely HAS been happening for alot longer than that.

Aiming while your randomly stuttering because one of your threads is maxed out is no fun. Something is wrong here. Any thoughts?

Let me know if you need more precise information.

While playing Star Wars Battlefront 2015
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Computer specs

6800K stock @ 3.4 GHz, 34C under gaming load. Intel RMA center had me run their processor diagnostics test, everything came back fine.
EVGA X99 Classified (third board, first one had issues, rma replacement had issues, on the third board)
16 GB G.Skill DDR4 3200 Mhz @ 2133 - Memtested 16 hours, passed with no problems.
G1 Gaming GTX 1080 - RMA tested, no issues.
 
Solution
If you look at thread CPU usage in Process Explorer, you will see the same pattern in every game: the main thread is always using 100% of one core. Most games are designed to busy-wait (burn CPU cycles) between external inputs instead of going to sleep between events to reduce input lag.
If you look at thread CPU usage in Process Explorer, you will see the same pattern in every game: the main thread is always using 100% of one core. Most games are designed to busy-wait (burn CPU cycles) between external inputs instead of going to sleep between events to reduce input lag.
 
Solution