Sounds like you erased your storage partition when you were setting up the disk for the re-install. You might be able to get your information back with the right tools (I'm sure others can make suggestions), but I hope you have a backup handy.
Intel i7 4790k @ stock, Asus Z97-PRO(Wi-Fi ac), 2x8GB Crucial DDR3 1600MHz, EVGA GTX 760
Samsung 950 Pro 512GB + 2TB Western Digital Black
Dell 2408WFP and Dell 2407WFP-HC for dual-24" goodness
Windows 10 64-bit