The connector that bridges the two PSUs started smoking, so I threw it out and decided to not go that route. I don’t think it could have been an issue with the PSU, because I think PSUs are designed to shut off their power supply if something goes wrong (like too much voltage).
BTW, I use the H97 Anniversary. I bought two H81s from Newegg and couldn’t get them to boot up. I returned those and just ordered another H81 to try out (because the H97 Anniversary boards are going for $300-500 right now)