|"The 2 cards (Gtx 260 core 216) that I have are from my previous computer so I want to use them and i'm gonna buy the gtx 285 later this year."|
Why would you go from two GTX-260s to a single GTX 285?
That would be quite a downgrade.
To wait for the DirectX 11 cards would be much wiser. They should arrive at around the same time as Windows 7...October, I believe.
"Is it possible that I use the Asus M4A79T Deluxe but than I don't have the sli support ."
Nope. You'll have to limit yourself to a single nVidia card or switch to Intel as jam mentioned.
"What is the big difference between a motherboard with sli support and one without sli support ?"
SLI-capable boards are usually built around nVidia chipsets (nForce). However, all that's required to run SLI on the Intel x58 chipset is nVidia's blessing...lol.
Dual core Opteron 185 @ 3.2GHz on A8N32-SLI Deluxe
4GB of CL2 PC3200
2x 8800GTS in SLI
Blu-Ray and HD-DVD
X-Fi Titanium for PCI-E
Samsung 24" LCD