You may want to try moving it to another slot and see if it shows up or if you have another card to test with. Or if you have another system that we can test this card in that will help us determine if we have a bad card or if we might have an issue with a slot in the riser.
Hello,  I just bought new PCIe risers and Perc 5/E to attach MD1000 to my PE1950 III, but Perc is not visible in bios. The green led is flashing on, but it can not detect the raid controller. Please suggest me how to fix this problem, Thanks!
Perc 5/E not showing in Bios