Mobo-CPU-RAM Upgrade, Cannot Detect HDDs

[Bludude41]

So about a week ago, I had some cash to blow and decided my Z97 rig was getting a little too slow for my liking, especially the SLI GTX 770s, which were showing their age in newer games.  I started shopping on Amazon, Newegg and on the eBay used market, and ended up with this:

 

CPU: Intel i7-7800X

Mobo: Gigabyte X299-UD4

RAM: Corsair Vengeance LPX 2x8GB DDR4 3000MHz

 

which was an upgrade from:

 

CPU: Intel i5-4690K

Mobo: ASRock Z97 Extreme4

RAM: Corsair Vengeance 2x4GB DDR3 1600MHz

 

so that was cool. I also got a Samsung 970EVO 240GB M.2 SSD to replace my old OCZ 128GB 2.5" SSD as the boot drive.

I also have 4 mechanical drives that I've had for years, I didn't touch them in my case at all except for plugging them into the new Gigabyte mobo's SATA ports.  After installing everything and hooking everything up I boot it for the first time, and notice something odd. It's detecting the M.2 drive, but only two of the four mechanical hard drives are being detected by the motherboard in the BIOS and in windows, the other 2 drives I don't see at all.
After flipping through some BIOS settings, I noticed that this new X299 motherboard only 2 modes I can enable on the SATA controller: AHCI and RST (Rapid Storage Technology)

 

My current hypothesis is that since I had the SATA controller on my Z97 rig set to IDE, that this new X299 motherboard's SATA controller would have to be in IDE mode to be able to detect them, but that's not listed as an option in the BIOS.

I could be wrong, and I'm hoping that's not the case, because I wouldn't know what to do if it is.  Does anyone have any suggestions as to what to try?  

 

P.S. I've already tried swapping around SATA ports on the motherboard.

 

Thanks in advance!

 

-Bludude4

[emosun]

do the drives show up in windows

[Bludude41]

Just now, emosun said:

do the drives show up in windows

nope. not in disk management and not in the file browser.

[emosun]

Quote

1 x SATA Express 10 Gb/s Connector (shared with SATA3_4, SATA3_5 and M.2 Socket)

i read that on the boards page , the sata ports might be shared with something else making them not function when the m2 drive is installed

[emosun]

oh its says this too

 

Quote

The M.2 Socket, SATA3_4, SATA3_5 and SATA Express share lanes. If either one of them is in use, the others will be disabled.

 

[Bludude41]

8 minutes ago, emosun said:

oh its says this too

 

 

Interesting.  Lemme mess around with the SATA port connections and see what happens, thanks!

You read that simply on the overview page for the motherboard on Gigabyte's website?

[emosun]

2 minutes ago, Bludude41 said:

You read that simply on the overview page for the motherboard on Gigabyte's website?

yea