Make sure that you using UEFI-only (no legacy) and disk controller is using AHCI mode for the HDD. You need to nuke any existing partitions on the HDDs as well. The setup should allow you create bootable UEFI partitions. I suspect that the setup is detecting legacy BIOS and this disables bootable GPT paritions for being created so you are stuck with 2TIB limit imposed by MBR.
Ivy Bridge i5-3570K@4.0Ghz, Gigabyte Z77X-UD3H, 2x4GiB of PC3-12800, Sapphire RX Vega 64, Corsair CX-600 and Fractal Refined R4 (W). Kentsfield Q6600@3Ghz, HD 4850 2x2GiB PC2-6400, Gigabyte EP45-DS4P, OCZ Modstream 700W, and PC-7B.