i read that they had problems with running lower quality modules on four banks
quote:
***I spoke with Damon Muzny at AMD about this and it is not actually a problem. This behavoir is actually by design. The reason is that AMD could not predict the behavoir off all DDR3-1333 memory. They found that with certain lower quality memory modules and all four slots populated (2 modules per channel) they encountered instability. They were faced with a choice; either they could drop listing support for DDR3 - 1333 or they could design the system to down clock the memory to 1066 and recommend it to everyone using 2 modules per channel.
You have probably guessesd what they chose.
In all honesty you can usually get more performance from a lower clock and tighter latency than a high clock and loose latency. Or you could always bump up the memory voltage and bring stability back that way.
***
i also seen a thread on other forum, where guy has actually got 8gigs(4modules) of ddr3 1600
http://forums.guru3d.com/showthread.php?p=3027388
seems it worx, but overall it just might be the same thing like with ddr2 1066, setting manually in bios, unganged mode with 2T