I need one card to kontruieren a compact PC case and the graphics card to place a floor down next to the motherboard. My first riser, in the PCIe slot was placed on a board and the flexible cable, produced some mistakes before I again shielded with aluminum tape this. But even then there was a connection with the PCIe 3.0 standard is not possible, but only 1.1 This one makes no mosquitoes. The cables have a clearly larger cross-section and the graphics card is detected promptly, and with PCIe 3.0 standard. The performance of my GTX780 shows no marginal losses to below 1%. I've had several benchmarks (3DMark 11 and Unigine Heaven div. Games like BF4, FarCry 3, World of Tanks, ..) with and without running this riser. Everything is absolute difficulty.
For this I must add that the ribbon cable is not shielded, what I did in front of the installation. A few meters aluminum tape costs only a few euros and well worth it, especially for video cards, which often times (I'd bet on elektr.magnetische) may malfunction.
My absolute buy recommendation for HTPC users or modders!