My PCI-E extender are soon to arrive, but as far as I know it is working good with any nv card
so I'm doubting there should be problem, but, because of it is chinese staff this thing might be broken from the beginning, in that case just ask a refund or just change it
I ended up returning the second one I ordered and decided to go with 7-9 card rigs instead of 10-12 to avoid the hassle. I probably wasted 4 days trying to get the 12 card rig stable with the expander.