No this does not preserve them. I believe it depends on the version, I am not 100% sure. I have it tested on SF450 no issues. Most of the times the sense is not necessary. It is primarily for high current loads over a longer wire distance to where you have voltage drop.Oh, a question I forgot to ask: do the Corsair SF PSUs have voltage sense wires on the 24-pin, and if so does this preserve them?