I have, E5-2686v3 QS and E5-2696v3 QS. I am using it on Astock Taichi x99. Solo cpu socket ofcourse.
With 2686v3 and C-Payne v0.1 patch for ASROCK mainboards it worked with very high performance and stable as rock (with 27 microcode installed in system, bus 105mhz) without any changes at bios (c-states on, c1e on, spread spectrum on). For example cinebench 2700+ (and even once was 3k), corona1.3 = 1.04, geekbench4 = 32700+.
At HWInfo a saw next parameters:
IA Overclocking: Voltage offset = -70 mV
GT Overclocking: Voltage offset = 0mV
CLR (CBo/LLC/Ring Overclocking): Voltage offset = -51 mV
Uncore Overclocking: Voltage offset = +100 mV (?)
https://img-fotki.yandex.ru/get/225650/51780633.0/0_14eda8_becd03fb_orig.png
When changed 2686v3 to 2696v3, it seems that he worked no so fast as it need
For example, stable working with C_Payne v0.1 asrock patch only when bus no more than 102 Mhz and bios energy saving futures are off (c1e, spread spectrum, c-states). And results at tests very bad. With 102 Mhz stable, but 2500+ at cinebench. If i want more, for example 3000 at cinebench - i use 103.5 bus but some applications didnt working
Do u have any advices for me? I think at first i need try to use v3x2_50_39vcc for maxmum results with maaximum stability? ( i can try it only after a week, now i am in hospital).
p.s. sorry for my english.