I'm too here...
Intel core i7 have embeded the memory controller operate @ 1.5V +/- ?, 800/1066Mhz DDR3 memory module, you may run @ 1.6V but the "lifespan" of the CPU will decrease. Unless you are over clockers...It may effect the warranty if something go wrong.
Basically, now on the new desktop board like the SmackOver DX58SO, the Memory controller has moved to the CPU.
The Optimized controller is more sensitive to voltage.
Voltages over 1.65 volts significantly reduce the life of the CPU.
The JEDEC spec only allows up to 1.5V. Memory run at default values will run at 1.5V
Everything is explained clearly on the website:
I am pretty sure that memory on this board will always default to JEDEC DDR3-1066 standards which can be found here http://en.wikipedia.org/wiki/Ddr3
What Intel does not mention is that the only way to use higher speeds/timings/voltages is to either overclock or use one of their eXtreme Edition (XE) CPUs.
So most high-end boutique memory is a complete waste of money unless you plan to overclock or buy a XE processor. I would just find some quality 1066MHz memory and leave it at that for the most bang for the buck (i.e. stability, price, etc.).
I have an i7-920 with a 3-pack Cosair memory, 2 GB each and all 1600 Mhz. Did I waste the extra money or should I try to overclock? I wish I would have known this when I wasted the money on that memory.
I'm running the DX58SO, along with a i7-940 and that particular memory kit you're referencing. If you flash to at least the 3828 BIOS,
the XMP option for the RAM should appear in the CMOS setup. I've been running @ 1600 since the BIOS was released with no ill effects.