I was fixing up a friends Dell tower and the crummy CapXon output caps in the PSU were bad. These were 2200uf/6.3V jobs. My experience, having fixed a huge amount of test equipment over the decades, is that electrolytic caps with less than a 15V or so rating are invariably the first to fail. I can't imagine designing 6.3V caps into anything!

Not having a suitable replacement on hand, and knowing that low ESR is really the primary consideration in a switching supply, not value, and suspecting that the CapXon part has no special abilities in that area, I installed a couple 150uF OSCONs....