intel i7-6700K skylake running default
evga z170 classified bios 1.4
samsung SM951 m.2 512GB PCI-express 3.0 SSD
GSkill TridenzZ 4x4gb ddr4 3866
EVGA Titan z 12gb 768-bit GDDR5
Corsair AXi series 1200W
Dell U3011 monitor at 2560x1600
second monitor HP25bw at 1920 x1080
Windows 10 64-bit
 
Memory does not run at spec.....reads as no memory. set at 3100 1.35 and when computer actually starts...it runs fine and fast....so I guess.  scores 7537 3dmark Firestrike extreme. Has never hung up or crashed, no bsod once windows loads. Tried many mem settings and often gets stuck early but once it loads windows..great.
 
BUT most of the time its hanging up somewhere on  initial boot.  Often hangs with code 62 southbridge initialization. it takes forever to load windows when it does start...and should be lightening fast.
 
Titan is in PE4 as the noctua cpu cooler blocks PE1.
ideas?
 
 
edit: quick internet search showed me lots of people having slow windows start and close. Turns out default power setting is sleep with power button not shut down. Changing this made it boot much faster.  However.....one boot in 3 gangs with post code 62.
 
Also.....most of the SATA ports don't seem to work.  Took me forever for the MB to see an add on HD. None of the Marvell 6g SATA or Intel 6G SATA connections are recognized.  Only connecting it to SATA Express port worked. I can't get the MB to see a dvd drive at all. 
 
Any chance the SSD on the m.2 PCI 3.0 slot is messing things up?
 

ok....do I need to RMA this board? None of the Marvell 6g SATA or Intel 6G SATA connections are recognized.  Only connecting an SSD to SATA Express port worked. I can't get the MB to see a dvd drive at all. 
 
conflict with m.2? that slot IS working 
 
Also.....the onboard sound is very limited. On my last evga MB it had typical audiojacks in the back. I use a headset on computer....and I set another jack to 'audio input' where i connected an augio out line from my TV....so I hear TV and my computer to my headset.....but on this board only one port can be configured to be either microphone in....or audio in....but I use a gaming headset and teamspeak....so I need the mic in. what am I missing?

no one?

roentgen
On the sata section of bios 0,1,2,3 are active which by the manual is pci e sata. 4,5 are grayed out (why?)....and where are the others? intel and marvell 6g sata ports?

I'm not certain but I think that when a M.2 SSD is attached it disables SATA_4 and SATA_5. The manual should confirm this.

I'm starting  asus z170a build. I did a breadboard setup and posted into bios, so far so good. waiting on my new psu to complete the build be here saturday I hope