Originally Posted by truckerguy
the thing I find interesting is the FM2 boards don't have a NB
AMD's new APU technology has the Northbridge's functions integrated on the chip die. There is no need for a NB on the MOBO, so prices for them should be lower. The Southbridge chips so far are "Hudson" D2 (A55), D3 (A75) and D4 (A85). These do the same thing all SB controllers do, support different levels of SATA, USB and other peripheral devices.
To answer another question regarding memory standard, that will be decided by the APU you use. Currently Llano and Trinity do NOT support DDR4, nor do they support PCIe 3.0.
I expect no move to PCIe 3.0 any time soon because this APU platform is designed for a low cost, low power graphics solution with mid to high-level graphic quality without compromising x86 performance. Because the NB function is integrated on the chip die, the need for PCIe 3.0 is much less than with on-board NB. As for a faster memory standard, it seems more memory gives this APU better performance, some FM1 boards already have 2400Mhz speeds available for DDR3 overclocking, so I expect to see no move on that either in the short run. I do expect to see higher DDR3 frequencies available as the MOBO manufacturers figure this new APU technology out.
When this APU does go to faster standards I expect a simultaneous move o PCIe 3.0 and skip over DDR4 in favor of DDR5.
In a year at least. By then... who knows?