I have this new board with new i5 CPU and 4 sticks of 4gb 1333mhz DDR3 memory.
I tried at first with all four sticks of memory and got flashing DRAM LED; so, I tried various configurations, constantly resetting the CMOS ROM. I have been able to boot with a single stick in B1; but, when I try to move the single stick to A2 (the recommended way to have 1 stick in), I can not get the thing to POST. If I try to use more than 1 stick of memory, I can't post. I've tried lowering the frequency and the same behavior persists. If I raise the frequency of the one stick beyond what is reasonable, I get a similar non-POST as if I try the one stick in a different place or multiple sticks.
I changed the voltage from the bios default of 1.65 to 1.5 ( http://www.wintecind.com/features/DRAM/Desktop_Memory/DDR3_Value.html ) but everything is the same. One stick in A2 causes the DRAM light to do all sorts of stuff and the BIOS to never come up .. switch to B1 and I can boot into the OS and things seem ok.
In A2, the DRAM LED stays on beckoning me to press the "Mem Ok" button. But, when I do, it just goes into an endless check, fans stopping and starting, DRAM light blinking ...
Everything here is ok: http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems#t1895014 a lot of the basic stuff can be thrown out since I can reliably boot the machine with a single stick in a particular slot.
Any suggestions? (free rep for wild guesses)
UPDATE: 2 sticks will work in B1 and B2 (or 1 stick in either) but I have had no luck with memory in A1/A2 ... bad motherboard?