Hyperthreading ON and OFF: Pictures (on 4790k 4.7 ghz 1070ti)
Here is my test.
With no hyperthreading, I used 2 tests. After a long game session of R6 Siege, and after a restart. With HW Monitor and MSI afterburner running in the background.
Hyperthreading OFF wins this battle, and also...there were no lag spikes on CPU with Hyperthreading off, besides when the map was loading in. Benchmark also shows that there are no dips in FPS.
After 5 years of gaming, I realized that those game stutters were caused by my CPU's Hyperthreading. The more you know!
I also disabled 4 cores and left 4 when doing a separate test with Hyperthread enabled, to simulate NO Hyperthread environment while the rest of the processes remain at full Hyperthreading, by going into Task Manager and setting affinity to 4 cores for R6 Siege.exe, and it performed better than 8 Cores enabled, and had no dips of FPS in benchmark run.
Thing to notice as well is that graph for gpu response on 4 Core manually set in Taskmanager for R6 Siege and Hyperthreading ON was almost unaffected by any lag spikes, in comparison to 8 cores enabled and Hyperthread on, where spike were on the graph, jumping in an out randomly. Hence you can see 8 cores resulted in dips to 40 FPS, which is shouldn't be.
It was definitely felt over the years, but I never figured out how to fix it. I tried setting different memory settings, I played with CPU voltages, etc.
Hyperthreading was the case. New CPUs are not running in the same kind of issues as far as I can tell, but my i7 4790k happens to have it.
Try it out, test it out. Perhaps it will be better.
Also my CPU temps dropped 5-12 Celcius with Hyperthreading OFF from what it was with Hyperthreading ON.
Also PC is consuming about 18 watts less when gaming with Hyperthreading ON, and I don't see any difference in computer speed.
I also tested start up times, and realized that it starts identically quick. I used the watch to compare.
If you are gaming, give it a shot, I noticed my FPS boosted in game by about 10-15 FPS, which is big for me, without doing anything, and reduced any kind of lag spike on GPU/CPU, it's flat on the graph with Hyperthreading OFF.
Separate video online ran tests in 10 games, and all of them performed better with Hyperthreading OFF with i7 4790k
Free FPS and stable frames. WHY NOT!