I spent almost my entire day trying to find from where the latency was coming, then was able pin point it only by luck when my internet connection dropped and the latency became finally normal.
Made few tests and finally removed the Intel network driver on my Asus P8Z77-V Deluxe motherboard, grabbed the last version of the driver available and it was still the same high latency spikes, then found this discussion here.
Tried the registry modification proposed in the previous pages, found 2 entries for "AlternateSemaphoreDelay" in the windows registry, set both to zero and restarted the PC but this seems to have absolutely no effect as we can see here on the first screenshot, then followed the advices on the previous pages and installed the 19.1 ones, and we can see the result in the second picture :
This problem seems to exist since a while and what worries me is the registry modification indicated is not working, you made something especially to bypass this issue and apparently even this workaround have no effect and i can't disable ME in my BIOS sadly.
Hope we get a solution to this quickly as win10 is around the corner and i was planning to switch from my win7 to this one at max in October and as the only fix for now is to use the 19.1 drivers I'll be screwed ...
Got a pci Intel ethernet card that i bought a couple of years ago for another PC but i guess it's pointless to move it from this other PC and try it on my main rig as they will probably use the same drivers :/
Hope you guys will come up with a fix for this, or make the registry modification work as supposed to at least bypass this issue.
Thanks in advance.