This is probably an easy question for someone but I'm concerned about all the talk about Bulldozer having 'native' support for 1866mhz RAM as I've currently got 2X4GB 1600Mhz Corsair Vengeance and am not sure if I'll be able to use them when I upgrade to an AM3+ motherboard?
Final specs have not been released on Bulldozer, so no guarrantees can be made. However, if Bulldozer does happen to have native support fr 1866mhz DDR3, it will in fact support 1600mhz DDR3 as well. DDR3 voltage, is a different story though. Core i7 required 1.5-1.65v DDR3, whereas at release most available DDR3 was 1.8-1.9v.