^^I do not have such big cards (no graphics card at all
) so I cannot confirm.
2. yes it comes with SBS710 with ACC for unlocking. But it does have unleash mode.
3. 4 x DIMM, Max. 16GB,
DDR3 1866(O.C.)/1333/1066 Hz ECC, Non-ECC, Un-buffered Memory
1600 is supported w.o OC.
Please go through the first post I have provided all relevant links.