I have two Rosewill units to choose from, one being Photon 550 and the other is PMG550. I purchased the Photon and had trouble getting a replacement cable so Rosewill sent the PMG550 at my request. PMG has two PCI-e connections at psu end although it only ships with one cable and still have to use split cable for two connections. I haven't been able to find oem with 100% certainty but believe the PMG is Hung Hing Electronics and the Photon is Sirtec. Photon has Rubycon and KZE caps and the PMG has Teapo caps. I'm sure neither is ideal but which one should I keep out of the two ?