USB 3 and SATA 6G/S and was thinking about the GIGABYTE GA-890GPA-UD3H
Neither is worth a damn, at the moment! May be in the future - remains to be seen... There are no SATA devices (even SLC SDDs) that can use the bandwidth, and an old-fashioned Intel ICH can still kick the Marvell's @$$: http://benchmarkreviews.com/index.php?option=com_conten...
USB3 may become 'useable' quicker, but they're having the devil's own time trying to get controllers to work that fast - most can only work by 'paralleling' a pair of controllers, which is expensive, both in fab cost and heat generation - for the time being, USB3 flash drives will be pricey, and have to have metal cases for heat dissipation (which makes 'em even more pricey!)...
That said, they're always 'future-proofing'; eventually, they're bound to get something working, if you don't mind updating drivers once a month (week?)!
The only person I've worked with here that has an 890 seems pretty pleased with it, though we haven't yet OC'd his BE, or tweaked his DDR3-1600... Try to get the memory with the lowest latency you can afford, at a reasonable speed - 1600, or 1333. Raw clock speed matters little - latencies matter a lot!
Yeah, I like bilbat's suggestions. I'd say its worth it to build around the 890gx, even though you may have a few growing pains..Going to be doing that for my niece, although I am considering giving her my 790gx and keeping the 890 for me In the future these interfaces will be useful, though they aren't so much right now.
I hear good things about the gskill ripjaws series of ram. I like OCZ and I have seen kits from them DDR3 1600 at cl7. I recommend you look at cl7 kits.
I've had absolutely excellent experience with G.Skill, both here, helping with OCs, and for the systems I do for myself, as well as the inevitable, endless parade of 'for a buddy of a buddy' setups - they're getting like Picasso's - everyone who sees one wants one
but I like to stay away from the first gen of a new chipset
Or new CPUs - like the bubonic plague! I still won't do i7s - they had exactly one 'second gen' board, with the PCIe termination problems fixed (GA-EX58-UD3R, rev 1.6/1.7) before it was 'off to the races' again, this time with new USB3/SATA3 'junque'! I'll invest in a SATA3/USB3 solution when Intel deigns to provide one - 'till then, I'm guessing my first i7 will be a server board with a Xeon