I am replacing a Dell XPS 420 PSU so I can upgrade the graphics card. The new one (Corsair builder) fits in just fine but there seems to be a plug I don't have. This is labelled "P2" on the original. It is a 4 pin version of the PCIE graphics card type. It has the same black and yellow wires. It is even possible to plug the end 4 pins of a PCIE plug in there but ... the wires are the wrong way round - i.e. the two yellow are next to the clip in the original but if ?I plug in a PCIE one if's the two black.
So ... Does anyone know what these are for - I am guessing fans?
Can I use a PCIE and the colour difference will it matter (unlikely)?
Is there an adapter available?
Can I swap the yellow and black wires and use a PCIE plug?
Can I cut the original 4 pin plug off and just connect to yellow and black using some shrink wrap to insulate/keep tidy?
Fingers crossed one of you good people out there knows this stuff.