Evga 790i Ultra & Crucial Ballistix 2 gb kit (1gbx2) PC3-16000 2000Mhz

Hi there , i would like to ask you that i want to buy 2 of this mermory module for to use it as 4gb kit (1gbx4) on my Evga 790i Ultra mainboard.

I keep hearing that with this 790i board , You can only run 2x1. You must put ddr2000 in the grey slots afaik.People say that Its the way the nforce 790i is setup.
2000 MHZ is reserved for those slots afaik, since there is no 2 x 2 kits avaible for 2000 mhz EPP2.0 "sli-ready" memory modules, you are forced to use only 2gb of these memory modules

So my question is, 790i ultra mainboard support 2000 mhz EPP2.0 "sli-ready" memory modules 1gbx4 with using 4 slots ? Or do i need to wait 2gbx2 versions of these memory modules for to use it as 4gb.

it would be glad if you can help me about this issue.Thanks...