This is quite the odd issue, I am using the following setup:
- ASRock Extreme4/3.1 (latest firmware)
- Intel Xeon E5-1650 v3
- Nvidia Titan X (Pascal)
- 8x16 GB DDR4 ECC RAM
- Samsung 950 Pro 256 GB m.2
- Intel 750 SSD
Before the addition of the Samsung 950 Pro M.2 drive everything was working fine, once I added in the 950 Pro I started having issues getting the Intel 750 SSD to show up in the UEFI screens. Unless I move the 750 SSD to a different PCIe slot than it was last boot it will not power on (no status LEDs) and the PCIe slot it is physically in will show as empty in the UEFI system browser tool on the motherboard. If I move it prior to boot it functions perfectly as my secondary drive. I did some research and I saw a few others on the internet having similar problems with the 750 using different motherboards using the same Intel X99 chipset. I'm wondering if there is a bug/limitation in the X99 chipset or the Intel 750 drive causing this? I can't imagine it's too common a scenario to run into but even then I did note a few posts online like the one I linked.
Thank you,
Daniel Smith