You might be able to but you cant have everything else to max w/o 2 gigs, but mind you I did that experiment on a GTX 256. I'm not sure if the 512 mem will help the system ram.
I havent had any problem at all I average 67FPS with everythng maxed out. Just a Note though: If you check out Xbitlabs recent Article on 1 gb vs 2 GB my dip's below 40FPS(15%) and a minium of 34 would be pretty much gone. If you havea good video card and you dip below 40 a majority of the time 2 gigs will eliminate that all together(resulting in 1% dip below 40fps)
No, i believe thats an Asus feature, not a crossfire mobo feature, or at least it can be implimented on NF4 boards. My old Asus A8N SLI deluxe had exactly the same feature. All it does is dynamically overclock the GPU(s) over the PCI-E bus, so u get slightly increased performance.
