don't worry, even my old H61 motherboard can be paired with the GTX 1050ti [after i updated the BIOS]
although my suggestion is to update your mobo's BIOS to the latest possible (if by any chance your BIOS right now didn't support it, u gonna have to unplug and either use the old GPU or integrated gpu to go back to the desktop and update your BIOS, so i suggest u update it now)
for PSU, if they don't provide any pin connector, that means the PSU aren't designed to handle that kind of usage, so u should avoid using a molex-to-pin converter and stick with the GTX 1050TI (which imo is the best GPU nowdays that doesn't require any pin connector)
also, bear in mind that some brands decided to add a 6pin port to their GTX 1050ti variant, so...