I7 4790k 4 Core OC?

[AlsrexoKitzre]

so I have an I7 4790k on an ASRock Fatal1ty Z97 motherboard, paired with a corsair H75 water cooler. I managed to disable hyper-threading in the bios and get the overclock all of the way to 5ghz.

I did notice, however, that in programs like cinnebench performance went down almost 200 points. However, loading applications is noticeably faster. Is it just a result of there now being only 4 logical cores instead of 8?

Another thing I tried was 3 cores with hyper-threading at 4.9ghz. The cinnebench score was even worse than the 4 cores at 5. Why?

I understand that performance in multi-threaded applications may suffer, but I would assume that nearly a full 1.0ghz overclock would make SOME of that up. (base is 4.2, turbo is 5.)

temperatures when stress tested in AIDA64 peaked at 90C after around 9 minutes of intense load.

 

[SinxarKnights]

I am going to guess throttling. If you get XTU it will show you how much it is being throttled (if at all). It isn't thermal throttling either it is some internal thing that slows it down.

Good job on getting to 5. I managed to get 4.95 @ 1.31. Hit a wall there though, tried up to 1.4v and it just can't gain that last 0.05.

 

[ShadyHamster]

Why disable HT? The whole point of the i7 is to have the 4 extra threads, you are effectively turning your i7 into an i5.
What OC can you achieve with 4c 8t?
Physical cores are always better to have then HT cores.