fan a/c advantages

[kglowacky]

beginning my final chapter of finishing my LS swap. Have read most if not all the threads on fan/relay hook up for ac. I am planning on running the factory ac system. I am NOT looking for diagrams on the hook up as there are plenty of them already posted on this forum. My question is what is the advantages of running three relays so the fans can run at half speed vs running two fans off the pcm and wire with a 3rd relay so
when you turn the ac on both fans come on 100%. I live in Houston and don't see any time I would need them to at 50% in this heat or saying it another way how would it hurt to run the fans at 100% while the ac is on. Thanks Your thoughts