Sierra lag on i7 860/Maximus3Formula/GTX780

[TraumAmnesia]

Hi, 

 

Here's my config : 

i7 860

Maximus III Formula

GTX 780

2x8go ram DDR3

Card Silverstone PCI Express 2 SATA 6gbps

SSD 850 EVO 500 Go

Dongle USB>Jack natively recognized.

 

I have a problem quite unordinary

I just migrated to Mac OS Sierra, and everything works but the OS itself lags, whether it's in the applications or opening the Finder, the preference panel, etc.

However my graphic card is well detected and the whole hardware is detected

 

I had the same problem on El Captain, that I resolved by recreating a cleaner EFI Clover. After doing that, it was perfectly fluid, but it didn't work on Sierra. 

 

I'm on Clover r3773 (see on the screenshot)

By the way, I ticked CloverEFI 64-bits BiosBlockIO to have the support of my PCI card and therefore make the most of the SATA 3

I'm configured in iMac 13,2 (the 14.2 made my GTX780 crash at boot)

 

Thanks !