SYONCON PCIe Multiplier, PCIe Splitter 1 to 4 PCI-Express 16X

How do PCIe to SATA expansion cards work, and does my PC pcie slot splitter Hi all, I have a single motherboard which has 4 PCIe x16 and 1 PCIe x1 slots I have 8 HD7950 GPUs I've looked into splitters a bit, pcie 4 gpu in pcie 3 slot 4X PCIe Splitter for GPU Riser Setup, Enable Gen1 in bios Crypto Mining 16 GPUs MINING

pcie slot function Now im looking for a pcie riser that splits the x16 PCIE slot into 2 times x8 slots Can get this splitter: Supermicro RSC-R2UT-2E8R 2U