Yes, according to a reddit postThose two 4 pins are probably power outputs for the sata drives. Now, 6 pin is the unknown for me, it's either PCIE 6 pin or something special for other rails like 5V and 3.3V.
But I think the extra 6pin PCIe is for the CPU, the 8pin max out around 230W(?) and this intel generation can go way past it...